diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/base/RuleCollections.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/base/RuleCollections.java
index 783fbaa..1f3801c 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/base/RuleCollections.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/base/RuleCollections.java
@@ -34,7 +34,7 @@
 import edu.uci.ics.asterix.optimizer.rules.IntroduceInstantLockSearchCallbackRule;
 import edu.uci.ics.asterix.optimizer.rules.IntroduceRapidFrameFlushProjectRule;
 import edu.uci.ics.asterix.optimizer.rules.IntroduceSecondaryIndexInsertDeleteRule;
-import edu.uci.ics.asterix.optimizer.rules.IntroduceStaticTypeCastRule;
+import edu.uci.ics.asterix.optimizer.rules.IntroduceStaticTypeCastForInsertRule;
 import edu.uci.ics.asterix.optimizer.rules.LoadRecordFieldsRule;
 import edu.uci.ics.asterix.optimizer.rules.NestGroupByRule;
 import edu.uci.ics.asterix.optimizer.rules.NestedSubplanToJoinRule;
@@ -122,7 +122,7 @@
         // IntroduceStaticTypeCastRule should go before
         // IntroduceDynamicTypeCastRule to
         // avoid unnecessary dynamic casting
-        normalization.add(new IntroduceStaticTypeCastRule());
+        normalization.add(new IntroduceStaticTypeCastForInsertRule());
         normalization.add(new IntroduceDynamicTypeCastRule());
         normalization.add(new IntroduceEnforcedListTypeRule());
         normalization.add(new ConstantFoldingRule());
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceEnforcedListTypeRule.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceEnforcedListTypeRule.java
index 2e8d530..a07583f 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceEnforcedListTypeRule.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceEnforcedListTypeRule.java
@@ -20,6 +20,7 @@
 
 import org.apache.commons.lang3.mutable.Mutable;
 
+import edu.uci.ics.asterix.om.typecomputer.base.TypeComputerUtilities;
 import edu.uci.ics.asterix.om.types.IAType;
 import edu.uci.ics.asterix.optimizer.rules.typecast.StaticTypeCastUtil;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -27,7 +28,6 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.IOptimizationContext;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalExpressionTag;
-import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalOperatorTag;
 import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression;
 import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
 import edu.uci.ics.hyracks.algebricks.core.algebra.operators.logical.AbstractAssignOperator;
@@ -53,26 +53,27 @@
             throws AlgebricksException {
         if (context.checkIfInDontApplySet(this, opRef.getValue()))
             return false;
-        AbstractLogicalOperator op1 = (AbstractLogicalOperator) opRef.getValue();
+        AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
         context.addToDontApplySet(this, opRef.getValue());
-        boolean changed = false;
 
         /**
          * rewrite list constructor types for list constructor functions
          */
-        if (op1.getOperatorTag() == LogicalOperatorTag.ASSIGN) {
-            AbstractAssignOperator assignOp = (AbstractAssignOperator) op1;
-            List<Mutable<ILogicalExpression>> expressions = assignOp.getExpressions();
-            IVariableTypeEnvironment env = assignOp.computeOutputTypeEnvironment(context);
-            changed = rewriteExpressions(expressions, env);
+        List<Mutable<ILogicalExpression>> expressions;
+        switch (op.getOperatorTag()) {
+            case ASSIGN:
+                AbstractAssignOperator assignOp = (AbstractAssignOperator) op;
+                expressions = assignOp.getExpressions();
+                break;
+            case UNNEST:
+                AbstractUnnestOperator unnestOp = (AbstractUnnestOperator) op;
+                expressions = Collections.singletonList(unnestOp.getExpressionRef());
+                break;
+            default:
+                return false;
         }
-        if (op1.getOperatorTag() == LogicalOperatorTag.UNNEST) {
-            AbstractUnnestOperator unnestOp = (AbstractUnnestOperator) op1;
-            List<Mutable<ILogicalExpression>> expressions = Collections.singletonList(unnestOp.getExpressionRef());
-            IVariableTypeEnvironment env = unnestOp.computeOutputTypeEnvironment(context);
-            changed = rewriteExpressions(expressions, env);
-        }
-        return changed;
+        IVariableTypeEnvironment env = op.computeOutputTypeEnvironment(context);
+        return rewriteExpressions(expressions, env);
     }
 
     private boolean rewriteExpressions(List<Mutable<ILogicalExpression>> expressions, IVariableTypeEnvironment env)
@@ -83,7 +84,10 @@
             if (expr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
                 AbstractFunctionCallExpression argFuncExpr = (AbstractFunctionCallExpression) expr;
                 IAType exprType = (IAType) env.getType(argFuncExpr);
-                changed = changed || StaticTypeCastUtil.rewriteListExpr(argFuncExpr, exprType, exprType, env);
+                if (StaticTypeCastUtil.rewriteListExpr(argFuncExpr, exprType, exprType, env)) {
+                    TypeComputerUtilities.resetRequiredAndInputTypes(argFuncExpr);
+                    changed = true;
+                }
             }
         }
         return changed;
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceStaticTypeCastRule.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceStaticTypeCastForInsertRule.java
similarity index 98%
rename from asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceStaticTypeCastRule.java
rename to asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceStaticTypeCastForInsertRule.java
index f42782b..850f01d 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceStaticTypeCastRule.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/IntroduceStaticTypeCastForInsertRule.java
@@ -60,7 +60,7 @@
  * ConstantFoldingRule uses ARecordSerializerDeserializer which seems to have
  * some problem.
  */
-public class IntroduceStaticTypeCastRule implements IAlgebraicRewriteRule {
+public class IntroduceStaticTypeCastForInsertRule implements IAlgebraicRewriteRule {
 
     @Override
     public boolean rewritePre(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/typecast/StaticTypeCastUtil.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/typecast/StaticTypeCastUtil.java
index 282d26b..e5d6bfc 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/typecast/StaticTypeCastUtil.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/typecast/StaticTypeCastUtil.java
@@ -47,6 +47,7 @@
 import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
 import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
 import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import edu.uci.ics.hyracks.algebricks.core.algebra.functions.IFunctionInfo;
 
 /**
@@ -98,7 +99,7 @@
                 if (argExpr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
                     AbstractFunctionCallExpression argFuncExpr = (AbstractFunctionCallExpression) argExpr;
                     IAType exprType = (IAType) env.getType(argFuncExpr);
-                    changed = changed || rewriteListExpr(argFuncExpr, exprType, exprType, env);
+                    changed = rewriteListExpr(argFuncExpr, exprType, exprType, env) || changed;
                 }
             }
             return changed;
@@ -163,7 +164,7 @@
                 }
             }
             if (!compatible(reqType, inputType)) {
-                throw new AlgebricksException("type mistmach, requred: " + reqType.toString() + " actual: "
+                throw new AlgebricksException("type mismatch, required: " + reqType.toString() + " actual: "
                         + inputType.toString());
             }
             return changed;
@@ -219,20 +220,21 @@
 
         IAType itemType = requiredListType.getItemType();
         IAType inputItemType = inputListType.getItemType();
+        boolean changed = false;
         for (int j = 0; j < args.size(); j++) {
             ILogicalExpression arg = args.get(j).getValue();
-            if (arg.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
-                ScalarFunctionCallExpression argFunc = (ScalarFunctionCallExpression) arg;
-                IAType currentItemType = (IAType) env.getType(argFunc);
-                if (inputItemType == null || inputItemType == BuiltinType.ANY) {
-                    currentItemType = (IAType) env.getType(argFunc);
-                    rewriteFuncExpr(argFunc, itemType, currentItemType, env);
-                } else {
-                    rewriteFuncExpr(argFunc, itemType, inputItemType, env);
-                }
+            IAType currentItemType = (inputItemType == null || inputItemType == BuiltinType.ANY) ? (IAType) env.getType(arg) : inputItemType;
+            switch (arg.getExpressionTag()) {
+                case FUNCTION_CALL:
+                    ScalarFunctionCallExpression argFunc = (ScalarFunctionCallExpression) arg;
+                    changed = rewriteFuncExpr(argFunc, itemType, currentItemType, env) || changed;
+                    break;
+                case VARIABLE:
+                    changed = injectCastToRelaxType(args.get(j), currentItemType, env) || changed;
+                    break;
             }
         }
-        return true;
+        return changed;
     }
 
     /**
@@ -426,67 +428,68 @@
             if (openFields[i]) {
                 arguments.add(originalArguments.get(2 * i));
                 Mutable<ILogicalExpression> expRef = originalArguments.get(2 * i + 1);
-                ILogicalExpression argExpr = expRef.getValue();
-                List<LogicalVariable> parameterVars = new ArrayList<LogicalVariable>();
-                argExpr.getUsedVariables(parameterVars);
-                // we need to handle open fields recursively by their default
-                // types
-                // for list, their item type is any
-                // for record, their
-                boolean castInjected = false;
-                if (argExpr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL
-                        || argExpr.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
-                    IAType reqFieldType = inputFieldTypes[i];
-                    // do not enforce nested type in the case of no-used variables
-                    if (inputFieldTypes[i].getTypeTag() == ATypeTag.RECORD) {
-                        reqFieldType = DefaultOpenFieldType.NESTED_OPEN_RECORD_TYPE;
-                        if (!inputFieldTypes[i].equals(reqFieldType) && parameterVars.size() > 0) {
-                            //inject dynamic type casting
-                            injectCastFunction(FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.CAST_RECORD),
-                                    reqFieldType, inputFieldTypes[i], expRef, argExpr);
-                            castInjected = true;
-                        }
-                    }
-                    if (inputFieldTypes[i].getTypeTag() == ATypeTag.ORDEREDLIST) {
-                        reqFieldType = DefaultOpenFieldType.NESTED_OPEN_AORDERED_LIST_TYPE;
-                        if (!inputFieldTypes[i].equals(reqFieldType) && parameterVars.size() > 0) {
-                            //inject dynamic type casting
-                            injectCastFunction(FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.CAST_LIST),
-                                    reqFieldType, inputFieldTypes[i], expRef, argExpr);
-                            castInjected = true;
-                        }
-                    }
-                    if (inputFieldTypes[i].getTypeTag() == ATypeTag.UNORDEREDLIST) {
-                        reqFieldType = DefaultOpenFieldType.NESTED_OPEN_AUNORDERED_LIST_TYPE;
-                        if (!inputFieldTypes[i].equals(reqFieldType) && parameterVars.size() > 0) {
-                            //inject dynamic type casting
-                            injectCastFunction(FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.CAST_LIST),
-                                    reqFieldType, inputFieldTypes[i], expRef, argExpr);
-                            castInjected = true;
-                        }
-                    }
-                    if (argExpr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
-                        //recursively rewrite function arguments
-                        if (TypeComputerUtilities.getRequiredType((AbstractFunctionCallExpression) argExpr) == null
-                                && reqFieldType != null) {
-                            if (castInjected) {
-                                //rewrite the arg expression inside the dynamic cast
-                                ScalarFunctionCallExpression argFunc = (ScalarFunctionCallExpression) argExpr;
-                                rewriteFuncExpr(argFunc, inputFieldTypes[i], inputFieldTypes[i], env);
-                            } else {
-                                //rewrite arg
-                                ScalarFunctionCallExpression argFunc = (ScalarFunctionCallExpression) argExpr;
-                                rewriteFuncExpr(argFunc, reqFieldType, inputFieldTypes[i], env);
-                            }
-                        }
-                    }
-                }
+                injectCastToRelaxType(expRef, inputFieldTypes[i], env);
                 arguments.add(expRef);
             }
         }
         return true;
     }
 
+    private static boolean injectCastToRelaxType(Mutable<ILogicalExpression> expRef, IAType inputFieldType,
+            IVariableTypeEnvironment env) throws AlgebricksException {
+        ILogicalExpression argExpr = expRef.getValue();
+        List<LogicalVariable> parameterVars = new ArrayList<LogicalVariable>();
+        argExpr.getUsedVariables(parameterVars);
+        // we need to handle open fields recursively by their default
+        // types
+        // for list, their item type is any
+        // for record, their
+        boolean castInjected = false;
+        if (argExpr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL
+                || argExpr.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
+            IAType reqFieldType = inputFieldType;
+            FunctionIdentifier fi = null;
+            // do not enforce nested type in the case of no-used variables
+            switch (inputFieldType.getTypeTag()) {
+                case RECORD:
+                    reqFieldType = DefaultOpenFieldType.NESTED_OPEN_RECORD_TYPE;
+                    fi = AsterixBuiltinFunctions.CAST_RECORD;
+                    break;
+                case ORDEREDLIST:
+                    reqFieldType = DefaultOpenFieldType.NESTED_OPEN_AORDERED_LIST_TYPE;
+                    fi = AsterixBuiltinFunctions.CAST_LIST;
+                    break;
+                case UNORDEREDLIST:
+                    reqFieldType = DefaultOpenFieldType.NESTED_OPEN_AUNORDERED_LIST_TYPE;
+                    fi = AsterixBuiltinFunctions.CAST_LIST;
+            }
+            if (fi != null
+                    && ! inputFieldType.equals(reqFieldType)
+                    && parameterVars.size() > 0) {
+                //inject dynamic type casting
+                injectCastFunction(FunctionUtils.getFunctionInfo(fi),
+                        reqFieldType, inputFieldType, expRef, argExpr);
+                castInjected = true;
+            }
+            if (argExpr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
+                //recursively rewrite function arguments
+                if (TypeComputerUtilities.getRequiredType((AbstractFunctionCallExpression) argExpr) == null
+                        && reqFieldType != null) {
+                    if (castInjected) {
+                        //rewrite the arg expression inside the dynamic cast
+                        ScalarFunctionCallExpression argFunc = (ScalarFunctionCallExpression) argExpr;
+                        rewriteFuncExpr(argFunc, inputFieldType, inputFieldType, env);
+                    } else {
+                        //rewrite arg
+                        ScalarFunctionCallExpression argFunc = (ScalarFunctionCallExpression) argExpr;
+                        rewriteFuncExpr(argFunc, reqFieldType, inputFieldType, env);
+                    }
+                }
+            }
+        }
+        return castInjected;
+    }
+
     /**
      * Inject a dynamic cast function wrapping an existing expression
      * 
@@ -516,7 +519,7 @@
      *            the required type
      * @param inputType
      *            the input type
-     * @return true if the two types are compatiable; false otherwise
+     * @return true if the two types are compatible; false otherwise
      */
     public static boolean compatible(IAType reqType, IAType inputType) {
         if (reqType.getTypeTag() == ATypeTag.ANY || inputType.getTypeTag() == ATypeTag.ANY) {
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java
index c858ed9..d72ba6a 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/APIFramework.java
@@ -162,7 +162,7 @@
             out.println();
             switch (pdf) {
                 case HTML: {
-                    out.println("<h3>Expression tree:</h3>");
+                    out.println("<h4>Expression tree:</h4>");
                     out.println("<pre>");
                     break;
                 }
@@ -197,7 +197,7 @@
 
             switch (pdf) {
                 case HTML: {
-                    out.println("<h3>Rewriten expression tree:</h3>");
+                    out.println("<h4>Rewritten expression tree:</h4>");
                     out.println("<pre>");
                     break;
                 }
@@ -234,7 +234,7 @@
 
             switch (pdf) {
                 case HTML: {
-                    out.println("<h3>Logical plan:</h3>");
+                    out.println("<h4>Logical plan:</h4>");
                     out.println("<pre>");
                     break;
                 }
@@ -289,7 +289,7 @@
                 } else {
                     switch (pdf) {
                         case HTML: {
-                            out.println("<h3>Optimized logical plan:</h3>");
+                            out.println("<h4>Optimized logical plan:</h4>");
                             out.println("<pre>");
                             break;
                         }
@@ -349,7 +349,7 @@
         if (pc.isPrintJob()) {
             switch (pdf) {
                 case HTML: {
-                    out.println("<h3>Hyracks job:</h3>");
+                    out.println("<h4>Hyracks job:</h4>");
                     out.println("<pre>");
                     break;
                 }
@@ -381,7 +381,7 @@
             hcc.waitForCompletion(jobId);
             long endTime = System.currentTimeMillis();
             double duration = (endTime - startTime) / 1000.00;
-            out.println("<pre>Duration: " + duration + "</pre>");
+            out.println("<pre>Duration: " + duration + " sec</pre>");
         }
 
     }
@@ -403,7 +403,7 @@
             }
             long endTime = System.currentTimeMillis();
             double duration = (endTime - startTime) / 1000.00;
-            out.println("<pre>Duration: " + duration + "</pre>");
+            out.println("<pre>Duration: " + duration + " sec</pre>");
         }
 
     }
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContext.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContext.java
index e64f68f..d4d7ac6 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContext.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/common/AsterixAppRuntimeContext.java
@@ -27,6 +27,8 @@
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.api.io.IIOManager;
+import edu.uci.ics.hyracks.api.lifecycle.ILifeCycleComponent;
+import edu.uci.ics.hyracks.api.lifecycle.LifeCycleComponentManager;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexLifecycleManager;
@@ -99,10 +101,9 @@
         ioManager = ncApplicationContext.getRootContext().getIOManager();
         bufferCache = new BufferCache(ioManager, allocator, prs, pcp, fileMapManager,
                 storageProperties.getBufferCachePageSize(), storageProperties.getBufferCacheNumPages(),
-                storageProperties.getBufferCacheMaxOpenFiles());
+                storageProperties.getBufferCacheMaxOpenFiles(), ncApplicationContext.getThreadFactory());
 
         indexLifecycleManager = new IndexLifecycleManager(storageProperties.getMemoryComponentGlobalBudget());
-
         lsmIOScheduler = SynchronousScheduler.INSTANCE;
         mergePolicy = new ConstantMergePolicy(storageProperties.getLSMIndexMergeThreshold(), this);
         lsmBTreeOpTrackerFactory = new IndexOperationTrackerFactory(LSMBTreeIOOperationCallbackFactory.INSTANCE);
@@ -120,6 +121,14 @@
                 this);
         txnSubsystem = new TransactionSubsystem(ncApplicationContext.getNodeId(), asterixAppRuntimeContextProvider);
         isShuttingdown = false;
+
+        // The order of registration is important. The buffer cache must registered before recovery and transaction managers.
+        LifeCycleComponentManager.INSTANCE.register((ILifeCycleComponent) bufferCache);
+        LifeCycleComponentManager.INSTANCE.register((ILifeCycleComponent) indexLifecycleManager);
+        LifeCycleComponentManager.INSTANCE.register((ILifeCycleComponent) txnSubsystem.getTransactionManager());
+        LifeCycleComponentManager.INSTANCE.register((ILifeCycleComponent) txnSubsystem.getLogManager());
+        LifeCycleComponentManager.INSTANCE.register((ILifeCycleComponent) txnSubsystem.getLockManager());
+        LifeCycleComponentManager.INSTANCE.register((ILifeCycleComponent) txnSubsystem.getRecoveryManager());
     }
 
     public boolean isShuttingdown() {
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/APIServlet.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/APIServlet.java
index d378429..bb03dc3 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/APIServlet.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/APIServlet.java
@@ -1,13 +1,16 @@
 package edu.uci.ics.asterix.api.http.servlet;
 
+import java.awt.image.BufferedImage;
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.util.List;
 import java.util.logging.Level;
 
+import javax.imageio.ImageIO;
 import javax.servlet.ServletContext;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
@@ -79,42 +82,21 @@
             aqlTranslator.compileAndExecute(hcc, hds, false);
             long endTime = System.currentTimeMillis();
             duration = (endTime - startTime) / 1000.00;
-            out.println("<PRE>Duration of all jobs: " + duration + "</PRE>");
+            out.println("<PRE>Duration of all jobs: " + duration + " sec</PRE>");
         } catch (ParseException | TokenMgrError | edu.uci.ics.asterix.aqlplus.parser.TokenMgrError pe) {
             GlobalConfig.ASTERIX_LOGGER.log(Level.INFO, pe.toString(), pe);
-            out.println("<pre class=\"error\">");
-            String message = pe.getMessage();
-            message = message.replace("<", "&lt");
-            message = message.replace(">", "&gt");
-            out.println("SyntaxError:" + message);
-            int pos = message.indexOf("line");
-            if (pos > 0) {
-                int columnPos = message.indexOf(",", pos + 1 + "line".length());
-                int lineNo = Integer.parseInt(message.substring(pos + "line".length() + 1, columnPos));
-                String[] lines = query.split("\n");
-                if (lineNo >= lines.length) {
-                    out.println("===> &ltBLANK LINE&gt");
-                } else {
-                    String line = lines[lineNo - 1];
-                    out.println("==> " + line);
-                }
-            }
-            out.println("</pre>");
+            ResultUtils.webUIParseExceptionHandler(out, pe, query);
         } catch (Exception e) {
-            String errorMessage = ResultUtils.extractErrorMessage(e);
-            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, errorMessage, e);
-            out.println("<pre class=\"error\">");
-            out.println(errorMessage);
-            out.println("</pre>");
+            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, e.getMessage(), e);
+            ResultUtils.webUIErrorHandler(out, e);
         }
     }
 
     @Override
     public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
         String resourcePath = null;
-        response.setCharacterEncoding("utf-8");
-        PrintWriter out = response.getWriter();
         String requestURI = request.getRequestURI();
+
         if (requestURI.equals("/")) {
             response.setContentType("text/html");
             resourcePath = "/webui/querytemplate.html";
@@ -127,6 +109,21 @@
             response.sendError(HttpServletResponse.SC_NOT_FOUND);
             return;
         }
+
+        // Special handler for font files and .png resources
+        if (resourcePath.endsWith(".png")) {
+
+            BufferedImage img = ImageIO.read(is);
+            OutputStream outputStream = response.getOutputStream();
+            String formatName = "png";
+            response.setContentType("image/png");
+            ImageIO.write(img, formatName, outputStream);
+            outputStream.close();
+            return;
+
+        }
+
+        response.setCharacterEncoding("utf-8");
         InputStreamReader isr = new InputStreamReader(is);
         StringBuilder sb = new StringBuilder();
         BufferedReader br = new BufferedReader(isr);
@@ -137,6 +134,7 @@
             line = br.readLine();
         }
 
+        PrintWriter out = response.getWriter();
         out.println(sb.toString());
     }
 
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/RESTAPIServlet.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/RESTAPIServlet.java
index dff759d..8caf05e 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/RESTAPIServlet.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/http/servlet/RESTAPIServlet.java
@@ -32,6 +32,7 @@
 import edu.uci.ics.asterix.aql.base.Statement.Kind;
 import edu.uci.ics.asterix.aql.parser.AQLParser;
 import edu.uci.ics.asterix.aql.parser.ParseException;
+import edu.uci.ics.asterix.aql.parser.TokenMgrError;
 import edu.uci.ics.asterix.aql.translator.AqlTranslator;
 import edu.uci.ics.asterix.common.config.GlobalConfig;
 import edu.uci.ics.asterix.metadata.MetadataManager;
@@ -95,35 +96,24 @@
             AqlTranslator aqlTranslator = new AqlTranslator(aqlStatements, out, sessionConfig, format);
 
             aqlTranslator.compileAndExecute(hcc, hds, asyncResults);
-
-        } catch (ParseException pe) {
-            GlobalConfig.ASTERIX_LOGGER.log(Level.INFO, pe.toString(), pe);
-            StringBuilder errorMessage = new StringBuilder();
-            String message = pe.getLocalizedMessage();
-            message = message.replace("<", "&lt");
-            message = message.replace(">", "&gt");
-            errorMessage.append("SyntaxError:" + message + "\n");
-            int pos = message.indexOf("line");
-            if (pos > 0) {
-                int columnPos = message.indexOf(",", pos + 1 + "line".length());
-                int lineNo = Integer.parseInt(message.substring(pos + "line".length() + 1, columnPos));
-                String line = query.split("\n")[lineNo - 1];
-                errorMessage.append("==> " + line + "\n");
-            }
-            JSONObject errorResp = ResultUtils.getErrorResponse(2, errorMessage.toString());
+        } catch (ParseException | TokenMgrError | edu.uci.ics.asterix.aqlplus.parser.TokenMgrError pe) {
+            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, pe.getMessage(), pe);
+            String errorMessage = ResultUtils.buildParseExceptionMessage(pe, query);
+            JSONObject errorResp = ResultUtils.getErrorResponse(2, errorMessage, "", "");
             out.write(errorResp.toString());
+            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
         } catch (Exception e) {
-            String errorMessage = ResultUtils.extractErrorMessage(e);
-            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, errorMessage, e);
-            JSONObject errorResp = ResultUtils.getErrorResponse(99, errorMessage);
-            out.write(errorResp.toString());
+            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, e.getMessage(), e);
+            ResultUtils.apiErrorHandler(out, e);
+            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
         }
     }
 
     private boolean checkForbiddenStatements(List<Statement> aqlStatements, PrintWriter out) {
         for (Statement st : aqlStatements) {
             if (!getAllowedStatements().contains(st.getKind())) {
-                JSONObject errorResp = ResultUtils.getErrorResponse(1, String.format(getErrorMessage(), st.getKind()));
+                JSONObject errorResp = ResultUtils.getErrorResponse(1, String.format(getErrorMessage(), st.getKind()),
+                        "", "");
                 out.write(errorResp.toString());
                 return true;
             }
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/aql/translator/AqlTranslator.java b/asterix-app/src/main/java/edu/uci/ics/asterix/aql/translator/AqlTranslator.java
index 911f6fd..93dcf39 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/aql/translator/AqlTranslator.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/aql/translator/AqlTranslator.java
@@ -186,112 +186,107 @@
             metadataProvider.setOutputFile(outputFile);
             metadataProvider.setConfig(config);
             jobsToExecute.clear();
-            try {
-                switch (stmt.getKind()) {
-                    case SET: {
-                        handleSetStatement(metadataProvider, stmt, config);
-                        break;
-                    }
-                    case DATAVERSE_DECL: {
-                        activeDefaultDataverse = handleUseDataverseStatement(metadataProvider, stmt);
-                        break;
-                    }
-                    case CREATE_DATAVERSE: {
-                        handleCreateDataverseStatement(metadataProvider, stmt);
-                        break;
-                    }
-                    case DATASET_DECL: {
-                        handleCreateDatasetStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-                    case CREATE_INDEX: {
-                        handleCreateIndexStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-                    case TYPE_DECL: {
-                        handleCreateTypeStatement(metadataProvider, stmt);
-                        break;
-                    }
-                    case NODEGROUP_DECL: {
-                        handleCreateNodeGroupStatement(metadataProvider, stmt);
-                        break;
-                    }
-                    case DATAVERSE_DROP: {
-                        handleDataverseDropStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-                    case DATASET_DROP: {
-                        handleDatasetDropStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-                    case INDEX_DROP: {
-                        handleIndexDropStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-                    case TYPE_DROP: {
-                        handleTypeDropStatement(metadataProvider, stmt);
-                        break;
-                    }
-                    case NODEGROUP_DROP: {
-                        handleNodegroupDropStatement(metadataProvider, stmt);
-                        break;
-                    }
-
-                    case CREATE_FUNCTION: {
-                        handleCreateFunctionStatement(metadataProvider, stmt);
-                        break;
-                    }
-
-                    case FUNCTION_DROP: {
-                        handleFunctionDropStatement(metadataProvider, stmt);
-                        break;
-                    }
-
-                    case LOAD_FROM_FILE: {
-                        handleLoadFromFileStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-                    case WRITE_FROM_QUERY_RESULT: {
-                        handleWriteFromQueryResultStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-                    case INSERT: {
-                        handleInsertStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-                    case DELETE: {
-                        handleDeleteStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-
-                    case BEGIN_FEED: {
-                        handleBeginFeedStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-
-                    case CONTROL_FEED: {
-                        handleControlFeedStatement(metadataProvider, stmt, hcc);
-                        break;
-                    }
-
-                    case QUERY: {
-                        metadataProvider.setResultSetId(new ResultSetId(resultSetIdCounter++));
-                        executionResult.add(handleQuery(metadataProvider, (Query) stmt, hcc, hdc, asyncResults));
-                        break;
-                    }
-
-                    case WRITE: {
-                        Pair<IAWriterFactory, FileSplit> result = handleWriteStatement(metadataProvider, stmt);
-                        if (result.first != null) {
-                            writerFactory = result.first;
-                        }
-                        outputFile = result.second;
-                        break;
-                    }
-
+            switch (stmt.getKind()) {
+                case SET: {
+                    handleSetStatement(metadataProvider, stmt, config);
+                    break;
                 }
-            } catch (Exception e) {
-                throw new AlgebricksException(e);
+                case DATAVERSE_DECL: {
+                    activeDefaultDataverse = handleUseDataverseStatement(metadataProvider, stmt);
+                    break;
+                }
+                case CREATE_DATAVERSE: {
+                    handleCreateDataverseStatement(metadataProvider, stmt);
+                    break;
+                }
+                case DATASET_DECL: {
+                    handleCreateDatasetStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+                case CREATE_INDEX: {
+                    handleCreateIndexStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+                case TYPE_DECL: {
+                    handleCreateTypeStatement(metadataProvider, stmt);
+                    break;
+                }
+                case NODEGROUP_DECL: {
+                    handleCreateNodeGroupStatement(metadataProvider, stmt);
+                    break;
+                }
+                case DATAVERSE_DROP: {
+                    handleDataverseDropStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+                case DATASET_DROP: {
+                    handleDatasetDropStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+                case INDEX_DROP: {
+                    handleIndexDropStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+                case TYPE_DROP: {
+                    handleTypeDropStatement(metadataProvider, stmt);
+                    break;
+                }
+                case NODEGROUP_DROP: {
+                    handleNodegroupDropStatement(metadataProvider, stmt);
+                    break;
+                }
+
+                case CREATE_FUNCTION: {
+                    handleCreateFunctionStatement(metadataProvider, stmt);
+                    break;
+                }
+
+                case FUNCTION_DROP: {
+                    handleFunctionDropStatement(metadataProvider, stmt);
+                    break;
+                }
+
+                case LOAD_FROM_FILE: {
+                    handleLoadFromFileStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+                case WRITE_FROM_QUERY_RESULT: {
+                    handleWriteFromQueryResultStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+                case INSERT: {
+                    handleInsertStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+                case DELETE: {
+                    handleDeleteStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+
+                case BEGIN_FEED: {
+                    handleBeginFeedStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+
+                case CONTROL_FEED: {
+                    handleControlFeedStatement(metadataProvider, stmt, hcc);
+                    break;
+                }
+
+                case QUERY: {
+                    metadataProvider.setResultSetId(new ResultSetId(resultSetIdCounter++));
+                    executionResult.add(handleQuery(metadataProvider, (Query) stmt, hcc, hdc, asyncResults));
+                    break;
+                }
+
+                case WRITE: {
+                    Pair<IAWriterFactory, FileSplit> result = handleWriteStatement(metadataProvider, stmt);
+                    if (result.first != null) {
+                        writerFactory = result.first;
+                    }
+                    outputFile = result.second;
+                    break;
+                }
             }
         }
         return executionResult;
@@ -364,7 +359,7 @@
             MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
         } catch (Exception e) {
             abort(e, e, mdTxnCtx);
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -528,7 +523,7 @@
                 }
             }
 
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -664,7 +659,7 @@
                             + "." + datasetName + "." + indexName + ") couldn't be removed from the metadata", e);
                 }
             }
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -703,7 +698,7 @@
             MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
         } catch (Exception e) {
             abort(e, e, mdTxnCtx);
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -817,7 +812,7 @@
                 }
             }
 
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -922,7 +917,7 @@
                 }
             }
 
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -1027,7 +1022,7 @@
                 }
             }
 
-            throw new AlgebricksException(e);
+            throw e;
 
         } finally {
             releaseWriteLatch();
@@ -1054,7 +1049,7 @@
             MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
         } catch (Exception e) {
             abort(e, e, mdTxnCtx);
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -1080,7 +1075,7 @@
             MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
         } catch (Exception e) {
             abort(e, e, mdTxnCtx);
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -1106,7 +1101,7 @@
             MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
         } catch (Exception e) {
             abort(e, e, mdTxnCtx);
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -1130,7 +1125,7 @@
             MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
         } catch (Exception e) {
             abort(e, e, mdTxnCtx);
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -1178,7 +1173,7 @@
                 abort(e, e, mdTxnCtx);
             }
 
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseReadLatch();
         }
@@ -1208,7 +1203,7 @@
             if (bActiveTxn) {
                 abort(e, e, mdTxnCtx);
             }
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseReadLatch();
         }
@@ -1241,7 +1236,7 @@
             if (bActiveTxn) {
                 abort(e, e, mdTxnCtx);
             }
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseReadLatch();
         }
@@ -1275,7 +1270,7 @@
             if (bActiveTxn) {
                 abort(e, e, mdTxnCtx);
             }
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseReadLatch();
         }
@@ -1341,7 +1336,7 @@
             if (bActiveTxn) {
                 abort(e, e, mdTxnCtx);
             }
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseReadLatch();
         }
@@ -1370,7 +1365,7 @@
             if (bActiveTxn) {
                 abort(e, e, mdTxnCtx);
             }
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseReadLatch();
         }
@@ -1401,28 +1396,38 @@
                     handle.put(jobId.getId());
                     handle.put(metadataProvider.getResultSetId().getId());
                     response.put("handle", handle);
+                    out.print(response);
+                    out.flush();
                 } else {
+                    if (pdf == DisplayFormat.HTML) {
+                        out.println("<h4>Results:</h4>");
+                        out.println("<pre>");
+                    }
+
                     ByteBuffer buffer = ByteBuffer.allocate(ResultReader.FRAME_SIZE);
                     ResultReader resultReader = new ResultReader(hcc, hdc);
                     resultReader.open(jobId, metadataProvider.getResultSetId());
                     buffer.clear();
-                    JSONArray results = new JSONArray();
+
                     while (resultReader.read(buffer) > 0) {
-                        results.put(ResultUtils.getJSONFromBuffer(buffer, resultReader.getFrameTupleAccessor()));
+                        response.put("results",
+                                ResultUtils.getJSONFromBuffer(buffer, resultReader.getFrameTupleAccessor()));
                         buffer.clear();
+                        switch (pdf) {
+                            case HTML:
+                                ResultUtils.prettyPrintHTML(out, response);
+                                break;
+                            case TEXT:
+                            case JSON:
+                                out.print(response);
+                                break;
+                        }
+                        out.flush();
                     }
-                    response.put("results", results);
-                }
-                switch (pdf) {
-                    case HTML:
-                        out.println("<pre>");
-                        ResultUtils.prettyPrintHTML(out, response);
+                    if (pdf == DisplayFormat.HTML) {
                         out.println("</pre>");
-                        break;
-                    case TEXT:
-                    case JSON:
-                        out.print(response);
-                        break;
+                    }
+
                 }
                 hcc.waitForCompletion(jobId);
             }
@@ -1433,7 +1438,7 @@
             if (bActiveTxn) {
                 abort(e, e, mdTxnCtx);
             }
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseReadLatch();
         }
@@ -1463,7 +1468,7 @@
             MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
         } catch (Exception e) {
             abort(e, e, mdTxnCtx);
-            throw new AlgebricksException(e);
+            throw e;
         } finally {
             releaseWriteLatch();
         }
@@ -1502,8 +1507,7 @@
         return format;
     }
 
-    private String getActiveDataverseName(String dataverse)
-            throws AlgebricksException {
+    private String getActiveDataverseName(String dataverse) throws AlgebricksException {
         if (dataverse != null) {
             return dataverse;
         }
@@ -1512,13 +1516,11 @@
         }
         throw new AlgebricksException("dataverse not specified");
     }
-    
-    private String getActiveDataverseName(Identifier dataverse)
-            throws AlgebricksException {
-        return getActiveDataverseName(
-                dataverse != null ? dataverse.getValue() : null);
+
+    private String getActiveDataverseName(Identifier dataverse) throws AlgebricksException {
+        return getActiveDataverseName(dataverse != null ? dataverse.getValue() : null);
     }
-    
+
     private void acquireWriteLatch() {
         MetadataManager.INSTANCE.acquireWriteLatch();
     }
@@ -1543,4 +1545,4 @@
             throw new IllegalStateException(rootE);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/CCApplicationEntryPoint.java b/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/CCApplicationEntryPoint.java
index 5d4f6ec..9b83f00 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/CCApplicationEntryPoint.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/CCApplicationEntryPoint.java
@@ -13,6 +13,7 @@
 import edu.uci.ics.asterix.api.http.servlet.QueryResultAPIServlet;
 import edu.uci.ics.asterix.api.http.servlet.QueryStatusAPIServlet;
 import edu.uci.ics.asterix.api.http.servlet.UpdateAPIServlet;
+import edu.uci.ics.asterix.common.api.AsterixThreadFactory;
 import edu.uci.ics.asterix.common.config.AsterixExternalProperties;
 import edu.uci.ics.asterix.common.config.AsterixMetadataProperties;
 import edu.uci.ics.asterix.metadata.MetadataManager;
@@ -37,12 +38,12 @@
     @Override
     public void start(ICCApplicationContext ccAppCtx, String[] args) throws Exception {
         this.appCtx = ccAppCtx;
+
         if (LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Starting Asterix cluster controller");
         }
-
+        appCtx.setThreadFactory(AsterixThreadFactory.INSTANCE);
         AsterixAppContextInfo.initialize(appCtx);
-
         proxy = AsterixStateProxy.registerRemoteObject();
         appCtx.setDistributedState(proxy);
 
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/NCApplicationEntryPoint.java b/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/NCApplicationEntryPoint.java
index 4569088..32bfeb5 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/NCApplicationEntryPoint.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/hyracks/bootstrap/NCApplicationEntryPoint.java
@@ -1,11 +1,15 @@
 package edu.uci.ics.asterix.hyracks.bootstrap;
 
+import java.io.File;
 import java.rmi.RemoteException;
 import java.rmi.server.UnicastRemoteObject;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import edu.uci.ics.asterix.api.common.AsterixAppRuntimeContext;
+import edu.uci.ics.asterix.common.api.AsterixThreadFactory;
 import edu.uci.ics.asterix.common.api.IAsterixAppRuntimeContext;
 import edu.uci.ics.asterix.common.config.AsterixMetadataProperties;
 import edu.uci.ics.asterix.common.config.IAsterixPropertiesProvider;
@@ -19,6 +23,7 @@
 import edu.uci.ics.asterix.transaction.management.resource.PersistentLocalResourceRepository;
 import edu.uci.ics.hyracks.api.application.INCApplicationContext;
 import edu.uci.ics.hyracks.api.application.INCApplicationEntryPoint;
+import edu.uci.ics.hyracks.api.lifecycle.LifeCycleComponentManager;
 
 public class NCApplicationEntryPoint implements INCApplicationEntryPoint {
     private static final Logger LOGGER = Logger.getLogger(NCApplicationEntryPoint.class.getName());
@@ -32,17 +37,19 @@
 
     @Override
     public void start(INCApplicationContext ncAppCtx, String[] args) throws Exception {
+        ncAppCtx.setThreadFactory(AsterixThreadFactory.INSTANCE);
         ncApplicationContext = ncAppCtx;
         nodeId = ncApplicationContext.getNodeId();
         if (LOGGER.isLoggable(Level.INFO)) {
-            LOGGER.info("Starting Asterix node controller: " + nodeId);
+            LOGGER.info("Starting Asterix node controller  TAKE NOTE: " + nodeId);
         }
+        JVMShutdownHook sHook = new JVMShutdownHook(this);
+        Runtime.getRuntime().addShutdownHook(sHook);
 
+     
         runtimeContext = new AsterixAppRuntimeContext(ncApplicationContext);
         runtimeContext.initialize();
         ncApplicationContext.setApplicationObject(runtimeContext);
-        JVMShutdownHook sHook = new JVMShutdownHook(this);
-        Runtime.getRuntime().addShutdownHook(sHook);
 
         // #. recover if the system is corrupted by checking system state.
         IRecoveryManager recoveryMgr = runtimeContext.getTransactionSubsystem().getRecoveryManager();
@@ -78,6 +85,8 @@
             if (isMetadataNode) {
                 MetadataBootstrap.stopUniverse();
             }
+
+            LifeCycleComponentManager.INSTANCE.stopAll(false);
             runtimeContext.deinitialize();
         } else {
             if (LOGGER.isLoggable(Level.INFO)) {
@@ -89,7 +98,8 @@
     @Override
     public void notifyStartupComplete() throws Exception {
         IAsterixStateProxy proxy = (IAsterixStateProxy) ncApplicationContext.getDistributedState();
-        AsterixMetadataProperties metadataProperties = ((IAsterixPropertiesProvider)runtimeContext).getMetadataProperties();
+        AsterixMetadataProperties metadataProperties = ((IAsterixPropertiesProvider) runtimeContext)
+                .getMetadataProperties();
 
         if (systemState == SystemState.NEW_UNIVERSE) {
             if (LOGGER.isLoggable(Level.INFO)) {
@@ -113,11 +123,29 @@
             }
             MetadataManager.INSTANCE = new MetadataManager(proxy, metadataProperties);
             MetadataManager.INSTANCE.init();
-            MetadataBootstrap.startUniverse( ((IAsterixPropertiesProvider)runtimeContext), ncApplicationContext,
+            MetadataBootstrap.startUniverse(((IAsterixPropertiesProvider) runtimeContext), ncApplicationContext,
                     systemState == SystemState.NEW_UNIVERSE);
             MetadataBootstrap.startDDLRecovery();
         }
 
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("Starting lifecycle components");
+        }
+        
+        Map<String, String> lifecycleMgmtConfiguration = new HashMap<String, String>();
+        String key = LifeCycleComponentManager.Config.DUMP_PATH_KEY;
+        String value = metadataProperties.getCoredumpPath(nodeId);
+        lifecycleMgmtConfiguration.put(key, value);
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("Coredump directory for NC is: " + value);
+        }
+        LifeCycleComponentManager.INSTANCE.configure(lifecycleMgmtConfiguration);
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("Configured:" + LifeCycleComponentManager.INSTANCE);
+        }
+        
+        LifeCycleComponentManager.INSTANCE.startAll();
+
         IRecoveryManager recoveryMgr = runtimeContext.getTransactionSubsystem().getRecoveryManager();
         recoveryMgr.checkpoint(true);
 
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/result/ResultUtils.java b/asterix-app/src/main/java/edu/uci/ics/asterix/result/ResultUtils.java
index 02cf6a4..012b7b2 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/result/ResultUtils.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/result/ResultUtils.java
@@ -14,14 +14,22 @@
  */
 package edu.uci.ics.asterix.result;
 
+import java.io.BufferedReader;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.io.PrintWriter;
+import java.io.StringWriter;
 import java.nio.ByteBuffer;
 
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 
+import com.sun.el.parser.ParseException;
+
+import edu.uci.ics.asterix.api.http.servlet.APIServlet;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.dataflow.common.comm.util.ByteBufferInputStream;
@@ -51,13 +59,18 @@
         return resultRecords;
     }
 
-    public static JSONObject getErrorResponse(int errorCode, String errorMessage) {
+    public static JSONObject getErrorResponse(int errorCode, String errorMessage, String errorSummary,
+            String errorStackTrace) {
         JSONObject errorResp = new JSONObject();
         JSONArray errorArray = new JSONArray();
         errorArray.put(errorCode);
         errorArray.put(errorMessage);
         try {
             errorResp.put("error-code", errorArray);
+            if (!errorSummary.equals(""))
+                errorResp.put("summary", errorSummary);
+            if (!errorStackTrace.equals(""))
+                errorResp.put("stacktrace", errorStackTrace);
         } catch (JSONException e) {
             // TODO(madhusudancs): Figure out what to do when JSONException occurs while building the results.
         }
@@ -65,30 +78,107 @@
     }
 
     public static void prettyPrintHTML(PrintWriter out, JSONObject jsonResultObj) {
-        JSONArray resultsWrapper;
-        JSONArray resultsArray;
         try {
-            resultsWrapper = jsonResultObj.getJSONArray("results");
-            for (int i = 0; i < resultsWrapper.length(); i++) {
-                resultsArray = resultsWrapper.getJSONArray(i);
-                for (int j = 0; j < resultsArray.length(); j++) {
-                    out.print(resultsArray.getString(j));
-                }
+            JSONArray resultsArray = jsonResultObj.getJSONArray("results");
+            for (int i = 0; i < resultsArray.length(); i++) {
+                out.print(resultsArray.getString(i));
             }
         } catch (JSONException e) {
             // TODO(madhusudancs): Figure out what to do when JSONException occurs while building the results.
         }
     }
 
+    public static void webUIErrorHandler(PrintWriter out, Exception e) {
+        String errorTemplate = readTemplateFile("/webui/errortemplate.html", "%s\n%s\n%s");
+
+        String errorOutput = String.format(errorTemplate, extractErrorMessage(e), extractErrorSummary(e),
+                extractFullStackTrace(e));
+        out.println(errorOutput);
+    }
+
+    public static void webUIParseExceptionHandler(PrintWriter out, Throwable e, String query) {
+        String errorTemplate = readTemplateFile("/webui/errortemplate_message.html", "<pre class=\"error\">%s\n</pre>");
+
+        String errorOutput = String.format(errorTemplate, buildParseExceptionMessage(e, query));
+        out.println(errorOutput);
+    }
+
+    public static void apiErrorHandler(PrintWriter out, Exception e) {
+        int errorCode = 99;
+        if (e instanceof ParseException) {
+            errorCode = 2;
+        } else if (e instanceof AlgebricksException) {
+            errorCode = 3;
+        } else if (e instanceof HyracksDataException) {
+            errorCode = 4;
+        }
+
+        JSONObject errorResp = ResultUtils.getErrorResponse(errorCode, extractErrorMessage(e), extractErrorSummary(e),
+                extractFullStackTrace(e));
+        out.write(errorResp.toString());
+    }
+
+    public static String buildParseExceptionMessage(Throwable e, String query) {
+        StringBuilder errorMessage = new StringBuilder();
+        String message = e.getMessage();
+        message = message.replace("<", "&lt");
+        message = message.replace(">", "&gt");
+        errorMessage.append("SyntaxError:" + message + "\n");
+        int pos = message.indexOf("line");
+        if (pos > 0) {
+            int columnPos = message.indexOf(",", pos + 1 + "line".length());
+            int lineNo = Integer.parseInt(message.substring(pos + "line".length() + 1, columnPos));
+            String[] lines = query.split("\n");
+            if (lineNo >= lines.length) {
+                errorMessage.append("===> &ltBLANK LINE&gt \n");
+            } else {
+                String line = lines[lineNo - 1];
+                errorMessage.append("==> " + line);
+            }
+        }
+        return errorMessage.toString();
+    }
+
+    private static Throwable getRootCause(Throwable cause) {
+        Throwable nextCause = cause.getCause();
+        while (nextCause != null) {
+            cause = nextCause;
+            nextCause = cause.getCause();
+        }
+        return cause;
+    }
+
     /**
-     * extract meaningful part of a stack trace:
+     * Extract the message in the root cause of the stack trace:
+     * 
+     * @param e
+     * @return error message string.
+     */
+    private static String extractErrorMessage(Throwable e) {
+        Throwable cause = getRootCause(e);
+
+        String exceptionClassName = "";
+        String[] messageSplits = cause.toString().split(":");
+        if (messageSplits.length > 1) {
+            String fullyQualifiedExceptionClassName = messageSplits[0];
+            System.out.println(fullyQualifiedExceptionClassName);
+            String[] hierarchySplits = fullyQualifiedExceptionClassName.split("\\.");
+            if (hierarchySplits.length > 0) {
+                exceptionClassName = hierarchySplits[hierarchySplits.length - 1];
+            }
+        }
+        return cause.getLocalizedMessage() + " [" + exceptionClassName + "]";
+    }
+
+    /**
+     * Extract the meaningful part of a stack trace:
      * a. the causes in the stack trace hierarchy
      * b. the top exception for each cause
      * 
      * @param e
      * @return the contacted message containing a and b.
      */
-    public static String extractErrorMessage(Throwable e) {
+    private static String extractErrorSummary(Throwable e) {
         StringBuilder errorMessageBuilder = new StringBuilder();
         Throwable cause = e;
         errorMessageBuilder.append(cause.getLocalizedMessage());
@@ -99,4 +189,48 @@
         }
         return errorMessageBuilder.toString();
     }
+
+    /**
+     * Extract the full stack trace:
+     * 
+     * @param e
+     * @return the string containing the full stack trace of the error.
+     */
+    private static String extractFullStackTrace(Throwable e) {
+        StringWriter stringWriter = new StringWriter();
+        PrintWriter printWriter = new PrintWriter(stringWriter);
+        e.printStackTrace(printWriter);
+        return stringWriter.toString();
+    }
+
+    /**
+     * Read the template file which is stored as a resource and return its content. If the file does not exist or is
+     * not readable return the default template string.
+     *
+     * @param path
+     *            The path to the resource template file
+     * @param defaultTemplate
+     *            The default template string if the template file does not exist or is not readable
+     * @return The template string to be used to render the output.
+     */
+    private static String readTemplateFile(String path, String defaultTemplate) {
+        String errorTemplate = defaultTemplate;
+        try {
+            String resourcePath = "/webui/errortemplate_message.html";
+            InputStream is = APIServlet.class.getResourceAsStream(resourcePath);
+            InputStreamReader isr = new InputStreamReader(is);
+            StringBuilder sb = new StringBuilder();
+            BufferedReader br = new BufferedReader(isr);
+            String line = br.readLine();
+
+            while (line != null) {
+                sb.append(line);
+                line = br.readLine();
+            }
+            errorTemplate = sb.toString();
+        } catch (IOException ioe) {
+            // If there is an IOException reading the error template html file, default value of error template is used.
+        }
+        return errorTemplate;
+    }
 }
diff --git a/asterix-app/src/main/resources/webui/errortemplate.html b/asterix-app/src/main/resources/webui/errortemplate.html
new file mode 100644
index 0000000..8c39e03
--- /dev/null
+++ b/asterix-app/src/main/resources/webui/errortemplate.html
@@ -0,0 +1,38 @@
+<div class="accordion" id="errorblock">
+  <div class="accordion-group">
+    <div class="accordion-heading">
+      <a class="accordion-toggle" data-toggle="collapse" data-parent="#errorblock" href="#levelOne">
+        Message
+      </a>
+    </div>
+    <div id="levelOne" class="accordion-body collapse in">
+      <div class="accordion-inner">
+        <pre class="error">%s</pre>
+      </div>
+    </div>
+  </div>
+  <div class="accordion-group">
+    <div class="accordion-heading">
+      <a class="accordion-toggle" data-toggle="collapse" data-parent="#errorblock" href="#levelTwo">
+        Summary
+      </a>
+    </div>
+    <div id="levelTwo" class="accordion-body collapse">
+      <div class="accordion-inner">
+        <pre class="error">%s</pre>
+      </div>
+    </div>
+  </div>
+  <div class="accordion-group">
+    <div class="accordion-heading">
+      <a class="accordion-toggle" data-toggle="collapse" data-parent="#errorblock" href="#levelThree">
+        Full Stack Trace
+      </a>
+    </div>
+    <div id="levelThree" class="accordion-body collapse">
+      <div class="accordion-inner">
+        <pre class="error">%s</pre>
+      </div>
+    </div>
+  </div>
+</div>
diff --git a/asterix-app/src/main/resources/webui/errortemplate_message.html b/asterix-app/src/main/resources/webui/errortemplate_message.html
new file mode 100644
index 0000000..ea95ccf
--- /dev/null
+++ b/asterix-app/src/main/resources/webui/errortemplate_message.html
@@ -0,0 +1,14 @@
+<div class="accordion" id="errorblock">
+  <div class="accordion-group">
+    <div class="accordion-heading">
+      <a class="accordion-toggle" data-toggle="collapse" data-parent="#errorblock" href="#levelOne">
+        Message
+      </a>
+    </div>
+    <div id="levelOne" class="accordion-body collapse in">
+      <div class="accordion-inner">
+        <pre class="error">%s</pre>
+      </div>
+    </div>
+  </div>
+</div>
diff --git a/asterix-app/src/main/resources/webui/querytemplate.html b/asterix-app/src/main/resources/webui/querytemplate.html
index 95323bb..f1c2e7e 100644
--- a/asterix-app/src/main/resources/webui/querytemplate.html
+++ b/asterix-app/src/main/resources/webui/querytemplate.html
@@ -14,23 +14,127 @@
 <link href="/webui/static/css/style.css" rel="stylesheet" type="text/css" />
 
 <script type="text/javascript">
-$(document).ready(function(){
-   $("form#queryform").submit(function() {
-     $('#output-message').html("");
-     $.post("/", $("form#queryform").serialize(), function(data) {
-       $('#output-message').html(data);
-     });
-     return false;
-   });
+$(document).ready(function() {
+
+    var optionButtonSize = $('#checkboxes-on').width();
+    $('#clear-query-button, #run-btn').width(optionButtonSize);
+
+    $('#checkboxes-on').click(function() {
+        /* Displays a checkmark to indicate selection/clearing */
+        if ($('#opts').is(":visible")) {
+            $('#opts').hide();
+            $('#queryform :input').prop('checked', false);
+        } else {
+            $('#opts').show();    
+            $('#queryform :input').prop('checked', true);
+        }    
+        return false;
+    });
+
+    $('#clear-query-button').click(function() {
+        $("#qry").val('');
+        return false;
+    });
+
+    $('form#queryform :input').click( function () {
+        /* Hides selection check on uncheck, shows when all 5 selected */
+        if ($(this).val()) {
+            if ($(this).is(':checked') && $('input[type=checkbox]').filter(':checked').length == 5) {
+                $('#opts').show();
+            } else {
+                $('#opts').hide();
+            }
+        }
+    });
+
+    $("form#queryform").submit(function() {
+        $('#output-message').html("");
+        $.post("/", $("form#queryform").serialize(), function(data) {
+
+            var resSet = 0;
+            var resPattern = /<h4>Results:<\/h4>/g;
+            var durPattern = /<PRE>Duration/g;
+            var errorPattern = /<div class="accordion" id="errorblock">/g;
+            var resultCount = data.match(resPattern);
+
+            if (!resPattern.test(data)) {
+                if(errorPattern.test(data)) {
+                  $('#output-heading').html('Error');
+                  $('#output-heading').addClass('error');
+                } else {
+                  $('#output-heading').html('Output');
+                  $('#output-heading').removeClass('error');
+                }
+                $('#output-message').html(data);
+            } else {
+                $('#output-heading').html('Output');
+                $('#output-heading').removeClass('error');
+                if (resultCount.length <= 1) {
+                    $('#output-message').html(data);
+                } else {
+                    var splitData = data.split('<PRE>Duration');
+                    var results = splitData[0].split('<h4>');
+                    var components = results.slice(1, results.length);
+                    var sections = components.length / resultCount.length;
+
+                    for (resSet = 0; resSet < resultCount.length; resSet++) {
+
+                        $('#output-message').append('<h4>' + components[(resSet+1)*sections - 1]);
+
+                        if (sections > 1) {
+                            var resNum = resSet + 1;
+                            $('<button/>')
+                                .attr("class", "btn")
+                                .attr("data-toggle", "collapse")
+                                .attr("data-target", "#collapse" + resSet)
+                                .css("margin-bottom", "1em")
+                                .html('Result Plan #' + resNum + '<i id="ibtn' + resSet + '" class="icon-plus extarget"></i>')
+                                .appendTo('#output-message');
+
+                            $('<div/>')
+                                .attr("id", "collapse" + resSet)
+                                .attr("class", "collapse in")
+                                .appendTo('#output-message');
+
+                            for (var c = 0; c < sections - 1; c++) {
+                                var pos = resSet*sections + c;
+                                $('#collapse' + resSet).append('<h4>' + components[pos]);
+                            }
+
+                            /* Placeholder for future on show/hide result plan behavior
+                            $('#collapse' + resSet).on('show', function() {
+                            }).on('hide', function() {
+                            });
+                            */
+
+                            $('#output-message').append("<hr/>");
+                        }
+
+                    }
+                    $('#output-message').append('<PRE>Duration' + splitData[1]);
+                }
+
+            }
+
+            var contentString = data.toString();
+            if (contentString.indexOf("<PRE>Duration") !== -1) {
+                $('<div/>')
+                    .addClass("alert alert-success")
+                    .html("Success: Query Complete")
+                    .appendTo('#output-message');
+            }
+        });
+        return false;
+    });
 });
 </script>
 
 <meta charset=utf-8 />
-<title>ASTERIX Demo</title>
+<title>AsterixDB Web Interface</title>
 </head>
 
 <body>
-  <div class="navbar navbar-inverse navbar-fixed-top">
+  <div class="navbar navbar-fixed-top">
     <div class="navbar-inner">
       <div class="container">
         <a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
@@ -38,12 +142,18 @@
           <span class="icon-bar"></span>
           <span class="icon-bar"></span>
         </a>
-        <a class="brand" href="#">ASTERIX</a>
+
+        <!-- Temporary logo placeholder -->
+        <a class="brand" href="#"><img src="/webui/static/img/finalasterixlogo.png"></a>
+
         <div class="nav-collapse collapse">
           <ul class="nav">
-            <li><a href="http://code.google.com/p/asterixdb/source/browse/">Open source</a></li>
-            <li><a href="http://code.google.com/p/asterixdb/issues/list">File issues</a></li>
-            <li><a href="https://groups.google.com/forum/?fromgroups#!forum/asterixdb-userst">Contact</a></li>
+            <li><a href="http://code.google.com/p/asterixdb/" target="_blank">
+                    Open source<img class="extarget" src="/webui/static/img/targetlink.png"/></a></li>
+            <li><a href="http://code.google.com/p/asterixdb/issues/list" target="_blank">
+                    File issues<img class="extarget" src="/webui/static/img/targetlink.png"/></a></li>
+            <li><a href="https://groups.google.com/forum/?fromgroups#!forum/asterixdb-users" target="_blank">
+                    Contact<img class="extarget" src="/webui/static/img/targetlink.png"/></a></li>
           </ul>
         </div><!--/.nav-collapse -->
       </div>
@@ -53,42 +163,48 @@
   <div class="content">
     <div class="container">
       <div class="row-fluid">
-        <div class="span6">
-          <form id="queryform" class="form-horizontal" method="post">
-            <div>
-              <label class="query">Query</label>
-              <textarea rows="10" name="query" class="query" value="%s" placeholder="Type your AQL query ..."></textarea>
-            </div>
-            <div>
-              <label class="checkbox"><input type="checkbox" checked="checked" name="print-expr-tree" value="true" /> Print parsed expressions</label>
-              <label class="checkbox"><input type="checkbox" checked="checked" name="print-rewritten-expr-tree" value="true" /> Print rewritten expressions</label>
-            </div>
-            <div>
-              <label class="checkbox"><input type="checkbox" checked="checked" name="print-logical-plan" value="true" /> Print logical plan</label>
-              <label class="checkbox"><input type="checkbox" checked="checked" name="print-optimized-logical-plan" value="true" /> Print optimized logical plan</label>
-            </div>
-            <div>
-              <label class="checkbox"><input type="checkbox" checked="checked" name="print-job" value="true" /> Print hyracks job</label>
-            </div>
-            <button type="submit" class="btn btn-danger">Execute</button>
-          </form>
-        </div>
 
         <div class="span6">
+
+          <form id="queryform" class="form-horizontal" method="post">
+            <div style="margin-bottom: 1em;">
+              <label class="query">Query</label>
+              <textarea rows="10" id="qry" name="query" class="query" value="%s" placeholder="Type your AQL query ..."></textarea>
+            </div>
+            
+          <div class="btn-group">
+            <button id="checkboxes-on" class="btn">
+                <i id="opts" class="icon-ok" style="display:none;"></i>Select Options</button>
+            <button id="clear-query-button" class="btn">Clear Query</button>
+            <!-- <button id="checkboxes-off" class="btn">Clear All Options</button> -->
+            <button type="submit" id="run-btn" class="btn btn-custom-darken">Run</button>
+          </div>
+
+            <div>
+              <label class="checkbox optlabel"><input type="checkbox" name="print-expr-tree" value="true" /> Print parsed expressions</label>
+              <label class="checkbox optlabel"><input type="checkbox" name="print-rewritten-expr-tree" value="true" /> Print rewritten expressions</label>
+              <label class="checkbox optlabel"><input type="checkbox" name="print-logical-plan" value="true" /> Print logical plan</label>
+              <label class="checkbox optlabel"><input type="checkbox" name="print-optimized-logical-plan" value="true" /> Print optimized logical plan</label>
+              <label class="checkbox optlabel"><input type="checkbox" name="print-job" value="true" /> Print Hyracks job</label>
+            </div>
+          </form>
+       </div>
+
+       <div class="span6">
          <div class="output">
-           <label class="heading">Output</label>
+           <label id="output-heading" class="heading">Output</label>
            <div id="output-message" class="message">
            </div>
          </div>
        </div>
+
       </div>
     </div>
-  </div>
+</div>
   <div class="footer">
     <section class="line"><hr></section>
     <section class="content">
       <section class="left">
-        Developed by ASTERIX group
       </section>
       <section class="right">
         &copy; Copyright 2013 University of California, Irvine
diff --git a/asterix-app/src/main/resources/webui/static/css/bootstrap.min.css b/asterix-app/src/main/resources/webui/static/css/bootstrap.min.css
index c10c7f4..518ad8e 100644
--- a/asterix-app/src/main/resources/webui/static/css/bootstrap.min.css
+++ b/asterix-app/src/main/resources/webui/static/css/bootstrap.min.css
@@ -1,9 +1,874 @@
 /*!
- * Bootstrap v2.3.1
+ * Bootstrap v2.3.2
  *
  * Copyright 2012 Twitter, Inc
  * Licensed under the Apache License v2.0
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Designed and built with all the love in the world @twitter by @mdo and @fat.
- */.clearfix{*zoom:1}.clearfix:before,.clearfix:after{display:table;line-height:0;content:""}.clearfix:after{clear:both}.hide-text{font:0/0 a;color:transparent;text-shadow:none;background-color:transparent;border:0}.input-block-level{display:block;width:100%;min-height:30px;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}article,aside,details,figcaption,figure,footer,header,hgroup,nav,section{display:block}audio,canvas,video{display:inline-block;*display:inline;*zoom:1}audio:not([controls]){display:none}html{font-size:100%;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}a:focus{outline:thin dotted #333;outline:5px auto -webkit-focus-ring-color;outline-offset:-2px}a:hover,a:active{outline:0}sub,sup{position:relative;font-size:75%;line-height:0;vertical-align:baseline}sup{top:-0.5em}sub{bottom:-0.25em}img{width:auto\9;height:auto;max-width:100%;vertical-align:middle;border:0;-ms-interpolation-mode:bicubic}#map_canvas img,.google-maps img{max-width:none}button,input,select,textarea{margin:0;font-size:100%;vertical-align:middle}button,input{*overflow:visible;line-height:normal}button::-moz-focus-inner,input::-moz-focus-inner{padding:0;border:0}button,html input[type="button"],input[type="reset"],input[type="submit"]{cursor:pointer;-webkit-appearance:button}label,select,button,input[type="button"],input[type="reset"],input[type="submit"],input[type="radio"],input[type="checkbox"]{cursor:pointer}input[type="search"]{-webkit-box-sizing:content-box;-moz-box-sizing:content-box;box-sizing:content-box;-webkit-appearance:textfield}input[type="search"]::-webkit-search-decoration,input[type="search"]::-webkit-search-cancel-button{-webkit-appearance:none}textarea{overflow:auto;vertical-align:top}@media print{*{color:#000!important;text-shadow:none!important;background:transparent!important;box-shadow:none!important}a,a:visited{text-decoration:underline}a[href]:after{content:" (" attr(href) ")"}abbr[title]:after{content:" (" 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+.hero-unit li{line-height:30px;}
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+.media,.media .media{margin-top:15px;}
+.media:first-child{margin-top:0;}
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+.media-heading{margin:0 0 5px;}
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.nav>li>a{margin-bottom:2px;} .nav-collapse .nav>.divider-vertical{display:none;} .nav-collapse .nav .nav-header{color:#777777;text-shadow:none;} .nav-collapse .nav>li>a,.nav-collapse .dropdown-menu a{padding:9px 15px;font-weight:bold;color:#777777;-webkit-border-radius:3px;-moz-border-radius:3px;border-radius:3px;} .nav-collapse .btn{padding:4px 10px 4px;font-weight:normal;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;} .nav-collapse .dropdown-menu li+li a{margin-bottom:2px;} .nav-collapse .nav>li>a:hover,.nav-collapse .nav>li>a:focus,.nav-collapse .dropdown-menu a:hover,.nav-collapse .dropdown-menu a:focus{background-color:#f2f2f2;} .navbar-inverse .nav-collapse .nav>li>a,.navbar-inverse .nav-collapse .dropdown-menu a{color:#999999;} .navbar-inverse .nav-collapse .nav>li>a:hover,.navbar-inverse .nav-collapse .nav>li>a:focus,.navbar-inverse .nav-collapse .dropdown-menu a:hover,.navbar-inverse .nav-collapse .dropdown-menu a:focus{background-color:#111111;} .nav-collapse.in .btn-group{margin-top:5px;padding:0;} .nav-collapse .dropdown-menu{position:static;top:auto;left:auto;float:none;display:none;max-width:none;margin:0 15px;padding:0;background-color:transparent;border:none;-webkit-border-radius:0;-moz-border-radius:0;border-radius:0;-webkit-box-shadow:none;-moz-box-shadow:none;box-shadow:none;} .nav-collapse .open>.dropdown-menu{display:block;} .nav-collapse .dropdown-menu:before,.nav-collapse .dropdown-menu:after{display:none;} .nav-collapse .dropdown-menu .divider{display:none;} .nav-collapse .nav>li>.dropdown-menu:before,.nav-collapse .nav>li>.dropdown-menu:after{display:none;} .nav-collapse .navbar-form,.nav-collapse .navbar-search{float:none;padding:10px 15px;margin:10px 0;border-top:1px solid #f2f2f2;border-bottom:1px solid #f2f2f2;-webkit-box-shadow:inset 0 1px 0 rgba(255,255,255,.1), 0 1px 0 rgba(255,255,255,.1);-moz-box-shadow:inset 0 1px 0 rgba(255,255,255,.1), 0 1px 0 rgba(255,255,255,.1);box-shadow:inset 0 1px 0 rgba(255,255,255,.1), 0 1px 0 rgba(255,255,255,.1);} .navbar-inverse .nav-collapse .navbar-form,.navbar-inverse .nav-collapse .navbar-search{border-top-color:#111111;border-bottom-color:#111111;} .navbar .nav-collapse .nav.pull-right{float:none;margin-left:0;} .nav-collapse,.nav-collapse.collapse{overflow:hidden;height:0;} .navbar .btn-navbar{display:block;} .navbar-static .navbar-inner{padding-left:10px;padding-right:10px;}}@media (min-width:980px){.nav-collapse.collapse{height:auto !important;overflow:visible !important;}}
diff --git a/asterix-app/src/main/resources/webui/static/css/style.css b/asterix-app/src/main/resources/webui/static/css/style.css
index b8688db..a3e411c 100644
--- a/asterix-app/src/main/resources/webui/static/css/style.css
+++ b/asterix-app/src/main/resources/webui/static/css/style.css
@@ -1,6 +1,6 @@
 body {
     background: none repeat scroll 0 0 white;
-    color: #222222;
+    color: black;
     font-family: 'Bitter';
     font-size: 14px;
     line-height: 17px;
@@ -8,13 +8,14 @@
 }
 
 .content {
-    margin-top: 70px;
+    margin-top: 36px;
 }
 
 label.query, label.result {
     font-size: 24px;
     padding-bottom: 10px;
     font-weight: bold;
+    color : #17265a;
 }
 
 div.host {
@@ -34,10 +35,14 @@
 div.right {
 }
 
-button.btn {
-    clear: both;
-    float: left;
-    margin: 20px 0 0 10px;;
+#run-btn {
+}
+
+#select-toggle-holder {
+    border: 1px black;
+    -webkit-border-radius: 5px;
+    -moz-border-radius: 5px;
+    border-radius: 5px;
 }
 
 textarea.query {
@@ -59,12 +64,18 @@
     padding-top: 10px;
 }
 
+#opts {
+    margin-right: 4px;
+}
+
 input[type=text] {
     height: 20px;
 }
 
 pre {
+    overflow-x : auto;
     overflow: auto;
+    overflow-wrap: normal;
     white-space: pre;
 }
 
@@ -73,6 +84,27 @@
     margin-top: 2px;
     padding-bottom: 10px;
     font-weight: bold;
+    color : #17265a;
+}
+
+div.output label.heading.error {
+    color: #E03809; 
+}
+
+div.output h4 {
+    color : #17265a;
+}
+
+a.accordion-toggle {
+    color : #17265a;
+}
+
+.accordion-inner {
+    padding : 0 0 0 0;
+}
+
+#errorblock .accordion-group .accordion-heading a.accordion-toggle {
+    color: #E03809;
 }
 
 div.output .message {
@@ -85,22 +117,7 @@
 }
 
 div.output .message pre.error {
-    -webkit-box-sizing: border-box;
-    -moz-box-sizing: border-box;
-    -ms-box-sizing: border-box;
-    box-sizing: border-box;
-    border-color: rgba(82, 168, 236, 0.8);
-    outline: 0;
-    outline: thin dotted 9;
-
-    -webkit-box-shadow: inset 0 1px 1px rgba(250, 0, 0, 0.075), 0 0 8px rgba(255, 0, 0, 0.8);
-    -moz-box-shadow: inset 0 1px 1px rgba(250, 0, 0, 0.075), 0 0 8px rgba(255, 0, 0, 1.0);
-    box-shadow: inset 0 1px 1px rgba(250, 0, 0, 0.075), 0 0 8px rgba(255, 0, 0, 1.0);
-    color: #000;
-    resize: none;
-    border: 1px solid #eee;
-    margin-top: 7px;
-    padding: 20px 20px 20px 20px;
+   border: 0;
 }
 
 .footer {
@@ -137,3 +154,60 @@
     padding-right: 20px;
     float: right;
 }
+
+.navbar .brand {
+    width: 160px;
+    height: 40px;
+    overflow: visible;
+    padding-top: 0;
+    padding-bottom: 0;
+}
+
+/*.navbar .nav > li > a {
+    color: #17265a;
+}*/
+
+.extarget {
+    margin-left: 4px;
+    padding-bottom: 2px;
+}
+
+.btn-custom-darken.active {
+  color: rgba(255, 255, 255, 0.75);
+}
+.btn-custom-darken {
+  color: #ffffff;
+  text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
+  background-color: #233887;
+  background-image: -moz-linear-gradient(top, #273f97, #1d2e6e);
+  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#273f97), to(#1d2e6e));
+  background-image: -webkit-linear-gradient(top, #273f97, #1d2e6e);
+  background-image: -o-linear-gradient(top, #273f97, #1d2e6e);
+  background-image: linear-gradient(to bottom, #273f97, #1d2e6e);
+  background-repeat: repeat-x;
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff273f97', endColorstr='#ff1d2e6e', GradientType=0);
+  border-color: #1d2e6e #1d2e6e #0d1532;
+  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
+  *background-color: #1d2e6e;
+  /* Darken IE7 buttons by default so they stand out more given they won't have borders */
+
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+}
+.btn-custom-darken:hover,
+.btn-custom-darken:focus,
+.btn-custom-darken:active,
+.btn-custom-darken.active,
+.btn-custom-darken.disabled,
+.btn-custom-darken[disabled] {
+  color: #ffffff;
+  background-color: #1d2e6e;
+  *background-color: #17265a;
+}
+.btn-custom-darken:active,
+.btn-custom-darken.active {
+  background-color: #121d46 ;
+}
+
+.span6 {
+    padding: 24px;
+}
diff --git a/asterix-app/src/main/resources/webui/static/img/finalasterixlogo.jpg b/asterix-app/src/main/resources/webui/static/img/finalasterixlogo.jpg
new file mode 100644
index 0000000..0ab3727
--- /dev/null
+++ b/asterix-app/src/main/resources/webui/static/img/finalasterixlogo.jpg
Binary files differ
diff --git a/asterix-app/src/main/resources/webui/static/img/finalasterixlogo.png b/asterix-app/src/main/resources/webui/static/img/finalasterixlogo.png
new file mode 100644
index 0000000..10ce431
--- /dev/null
+++ b/asterix-app/src/main/resources/webui/static/img/finalasterixlogo.png
Binary files differ
diff --git a/asterix-app/src/main/resources/webui/static/img/targetlink.png b/asterix-app/src/main/resources/webui/static/img/targetlink.png
new file mode 100644
index 0000000..68ceb60
--- /dev/null
+++ b/asterix-app/src/main/resources/webui/static/img/targetlink.png
Binary files differ
diff --git a/asterix-app/src/main/resources/webui/static/js/bootstrap.min.js b/asterix-app/src/main/resources/webui/static/js/bootstrap.min.js
index 95c5ac5..319a85d 100644
--- a/asterix-app/src/main/resources/webui/static/js/bootstrap.min.js
+++ b/asterix-app/src/main/resources/webui/static/js/bootstrap.min.js
@@ -1,6 +1,7 @@
-/*!
+/**
 * Bootstrap.js by @fat & @mdo
+* plugins: bootstrap-transition.js, bootstrap-modal.js, bootstrap-dropdown.js, bootstrap-scrollspy.js, bootstrap-tab.js, bootstrap-tooltip.js, bootstrap-popover.js, bootstrap-affix.js, bootstrap-alert.js, bootstrap-button.js, bootstrap-collapse.js, bootstrap-carousel.js, bootstrap-typeahead.js
 * Copyright 2012 Twitter, Inc.
 * http://www.apache.org/licenses/LICENSE-2.0.txt
 */
-!function(e){"use strict";e(function(){e.support.transition=function(){var e=function(){var e=document.createElement("bootstrap"),t={WebkitTransition:"webkitTransitionEnd",MozTransition:"transitionend",OTransition:"oTransitionEnd otransitionend",transition:"transitionend"},n;for(n in t)if(e.style[n]!==undefined)return t[n]}();return e&&{end:e}}()})}(window.jQuery),!function(e){"use strict";var t='[data-dismiss="alert"]',n=function(n){e(n).on("click",t,this.close)};n.prototype.close=function(t){function s(){i.trigger("closed").remove()}var n=e(this),r=n.attr("data-target"),i;r||(r=n.attr("href"),r=r&&r.replace(/.*(?=#[^\s]*$)/,"")),i=e(r),t&&t.preventDefault(),i.length||(i=n.hasClass("alert")?n:n.parent()),i.trigger(t=e.Event("close"));if(t.isDefaultPrevented())return;i.removeClass("in"),e.support.transition&&i.hasClass("fade")?i.on(e.support.transition.end,s):s()};var r=e.fn.alert;e.fn.alert=function(t){return this.each(function(){var 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\ No newline at end of file
diff --git a/asterix-app/src/test/resources/hadoop/conf/mapred-site.xml b/asterix-app/src/test/resources/hadoop/conf/mapred-site.xml
index 1b9a4d6..b39fced 100644
--- a/asterix-app/src/test/resources/hadoop/conf/mapred-site.xml
+++ b/asterix-app/src/test/resources/hadoop/conf/mapred-site.xml
@@ -5,21 +5,21 @@
 
 <configuration>
 
-  <property>
-    <name>mapred.job.tracker</name>
-    <value>localhost:29007</value>
-  </property>
-  <property>
-     <name>mapred.tasktracker.map.tasks.maximum</name>
-     <value>20</value>
-  </property>
-   <property>
-      <name>mapred.tasktracker.reduce.tasks.maximum</name>
-      <value>20</value>
-   </property>
-   <property>
-      <name>mapred.min.split.size</name>
-      <value>65536</value>
-   </property>
+	<property>
+		<name>mapred.job.tracker</name>
+		<value>localhost:29007</value>
+	</property>
+	<property>
+		<name>mapred.tasktracker.map.tasks.maximum</name>
+		<value>20</value>
+	</property>
+	<property>
+		<name>mapred.tasktracker.reduce.tasks.maximum</name>
+		<value>20</value>
+	</property>
+	<property>
+		<name>mapred.max.split.size</name>
+		<value>128</value>
+	</property>
 
 </configuration>
diff --git a/asterix-app/src/test/resources/runtimets/queries/aggregate/query-issue400/query-issue400.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/aggregate/query-issue400/query-issue400.3.query.aql
index 9819455..4611058 100644
--- a/asterix-app/src/test/resources/runtimets/queries/aggregate/query-issue400/query-issue400.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/aggregate/query-issue400/query-issue400.3.query.aql
@@ -6,4 +6,4 @@
  */
  
 let $l := [[1,2,3,4,5],[6,7,8,9]]
-return count(for $i in $l return $i)
\ No newline at end of file
+return count(for $i in $l return $i)
diff --git a/asterix-app/src/test/resources/runtimets/queries/hdfs/issue_245_hdfs/issue_245_hdfs.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/hdfs/issue_245_hdfs/issue_245_hdfs.3.query.aql
index 653ee6c..527a0e5 100644
--- a/asterix-app/src/test/resources/runtimets/queries/hdfs/issue_245_hdfs/issue_245_hdfs.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/hdfs/issue_245_hdfs/issue_245_hdfs.3.query.aql
@@ -8,4 +8,5 @@
 use dataverse test;
 
 for $x in dataset('TextDataset')
+order by $x.line
 return $x
diff --git a/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue456/query-issue456.1.ddl.aql b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue456/query-issue456.1.ddl.aql
new file mode 100644
index 0000000..edd97cd
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue456/query-issue456.1.ddl.aql
@@ -0,0 +1,20 @@
+/*
+ * Description  : This test case is to verify the fix for issue456: 
+ *                https://code.google.com/p/asterixdb/issues/detail?id=456
+ * Expected Res : SUCCESS
+ * Date         : 3rd June 2013
+ */
+ 
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+create type TypeOpen as open {
+  id : int32,
+  int_m : int32,
+  int_o : int32?,
+  string_m : string,
+  string_o : string?
+};
+
+create dataset DataOpen(TypeOpen) primary key id;
diff --git a/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue456/query-issue456.2.update.aql b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue456/query-issue456.2.update.aql
new file mode 100644
index 0000000..e084b44
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue456/query-issue456.2.update.aql
@@ -0,0 +1,25 @@
+/*
+ * Description  : This test case is to verify the fix for issue456: 
+ *                https://code.google.com/p/asterixdb/issues/detail?id=456
+ * Expected Res : SUCCESS
+ * Date         : 3rd June 2013
+ */
+
+use dataverse test;
+
+insert into dataset DataOpen({ "id": 0, "int_m": 1, "int_o": 1, "string_m": "a", "string_o": "a" });
+insert into dataset DataOpen({ "id": 1, "int_m": 1, "int_o": 1, "string_m": "a", "string_o": null });
+insert into dataset DataOpen({ "id": 2, "int_m": 1, "int_o": 1, "string_m": "b", "string_o": "a" });
+insert into dataset DataOpen({ "id": 3, "int_m": 1, "int_o": 1, "string_m": "b", "string_o": null });
+insert into dataset DataOpen({ "id": 4, "int_m": 1, "int_o": null, "string_m": "a", "string_o": "a" });
+insert into dataset DataOpen({ "id": 5, "int_m": 1, "int_o": null, "string_m": "a", "string_o": null });
+insert into dataset DataOpen({ "id": 6, "int_m": 1, "int_o": null, "string_m": "b", "string_o": "a" });
+insert into dataset DataOpen({ "id": 7, "int_m": 1, "int_o": null, "string_m": "b", "string_o": null });
+insert into dataset DataOpen({ "id": 8, "int_m": 2, "int_o": 1, "string_m": "a", "string_o": "a" });
+insert into dataset DataOpen({ "id": 9, "int_m": 2, "int_o": 1, "string_m": "a", "string_o": null });
+insert into dataset DataOpen({ "id": 10, "int_m": 2, "int_o": 1, "string_m": "b", "string_o": "a" });
+insert into dataset DataOpen({ "id": 11, "int_m": 2, "int_o": 1, "string_m": "b", "string_o": null });
+insert into dataset DataOpen({ "id": 12, "int_m": 2, "int_o": null, "string_m": "a", "string_o": "a" });
+insert into dataset DataOpen({ "id": 13, "int_m": 2, "int_o": null, "string_m": "a", "string_o": null });
+insert into dataset DataOpen({ "id": 14, "int_m": 2, "int_o": null, "string_m": "b", "string_o": "a" });
+insert into dataset DataOpen({ "id": 15, "int_m": 2, "int_o": null, "string_m": "b", "string_o": null });
diff --git a/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue456/query-issue456.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue456/query-issue456.3.query.aql
new file mode 100644
index 0000000..217fbd1
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue456/query-issue456.3.query.aql
@@ -0,0 +1,13 @@
+/*
+ * Description  : This test case is to verify the fix for issue456: 
+ *                https://code.google.com/p/asterixdb/issues/detail?id=456
+ * Expected Res : SUCCESS
+ * Date         : 3rd June 2013
+ */
+
+use dataverse test;
+
+for $x in dataset DataOpen
+let $id := $x.id
+group by $m := $x.int_m with $id
+return [ $m, count($id) ]
diff --git a/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue465/query-issue465.1.ddl.aql b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue465/query-issue465.1.ddl.aql
new file mode 100644
index 0000000..9f5fb23
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue465/query-issue465.1.ddl.aql
@@ -0,0 +1,7 @@
+/*
+ * Description  : This test case is to verify the fix for issue465: 
+ *                https://code.google.com/p/asterixdb/issues/detail?id=465
+ * Expected Res : SUCCESS
+ * Date         : 3rd June 2013
+ */
+ 
diff --git a/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue465/query-issue465.2.update.aql b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue465/query-issue465.2.update.aql
new file mode 100644
index 0000000..9f5fb23
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue465/query-issue465.2.update.aql
@@ -0,0 +1,7 @@
+/*
+ * Description  : This test case is to verify the fix for issue465: 
+ *                https://code.google.com/p/asterixdb/issues/detail?id=465
+ * Expected Res : SUCCESS
+ * Date         : 3rd June 2013
+ */
+ 
diff --git a/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue465/query-issue465.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue465/query-issue465.3.query.aql
new file mode 100644
index 0000000..244b193
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/open-closed/query-issue465/query-issue465.3.query.aql
@@ -0,0 +1,10 @@
+/*
+ * Description  : This test case is to verify the fix for issue465: 
+ *                https://code.google.com/p/asterixdb/issues/detail?id=465
+ * Expected Res : SUCCESS
+ * Date         : 3rd June 2013
+ */
+
+let $a := {"r1":1234}
+let $b := {"r2":456}
+return [ $a, $b ]
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.1.ddl.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.1.ddl.aql
new file mode 100644
index 0000000..93b9131
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.1.ddl.aql
@@ -0,0 +1,20 @@
+/*
+ * Description  : This test case is to verify the fix for issue 489
+ 	          https://code.google.com/p/asterixdb/issues/detail?id=489
+ * Expected Res : Success
+ * Date         : 31st May 2013
+ */
+ 
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+create function f1()
+{
+"function with no input"
+}
+
+create function f1($a)
+{
+"function with input"
+}
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.2.query.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.2.query.aql
new file mode 100644
index 0000000..4dcf6e6
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.2.query.aql
@@ -0,0 +1,12 @@
+/*
+ * Description  : This test case is to verify the fix for issue 489
+ 	          https://code.google.com/p/asterixdb/issues/detail?id=489
+ * Expected Res : Success
+ * Date         : 31st May 2013
+ */
+
+count(
+for $x in dataset Metadata.Function
+where $x.DataverseName='test'
+return $x
+)
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.3.ddl.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.3.ddl.aql
new file mode 100644
index 0000000..867ae7a
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.3.ddl.aql
@@ -0,0 +1,10 @@
+/*
+ * Description  : This test case is to verify the fix for issue 489
+ 	          https://code.google.com/p/asterixdb/issues/detail?id=489
+ * Expected Res : Success
+ * Date         : 31st May 2013
+ */
+ 
+drop dataverse test if exists;
+create dataverse test;
+
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.4.query.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.4.query.aql
new file mode 100644
index 0000000..4dcf6e6
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/query-issue489/query-issue489.4.query.aql
@@ -0,0 +1,12 @@
+/*
+ * Description  : This test case is to verify the fix for issue 489
+ 	          https://code.google.com/p/asterixdb/issues/detail?id=489
+ * Expected Res : Success
+ * Date         : 31st May 2013
+ */
+
+count(
+for $x in dataset Metadata.Function
+where $x.DataverseName='test'
+return $x
+)
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/udf29/udf29.1.ddl.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/udf29/udf29.1.ddl.aql
index edede00..f9f1e25 100644
--- a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/udf29/udf29.1.ddl.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/udf29/udf29.1.ddl.aql
@@ -8,9 +8,3 @@
 drop dataverse test if exists;
 create dataverse test;
 
-use dataverse test;
-
-declare function test.f1(){
-100
-};
-
diff --git a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/udf29/udf29.2.query.aql b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/udf29/udf29.2.query.aql
index 2f9e763..5755963 100644
--- a/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/udf29/udf29.2.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/user-defined-functions/udf29/udf29.2.query.aql
@@ -5,5 +5,10 @@
  */
 
 use dataverse test;
+
+declare function f1(){
+100
+};
+
 let $x:=f1()
 return $x
diff --git a/asterix-app/src/test/resources/runtimets/results/hdfs/issue_245_hdfs/issue_245_hdfs.1.adm b/asterix-app/src/test/resources/runtimets/results/hdfs/issue_245_hdfs/issue_245_hdfs.1.adm
index 8af2f5f..59425b1 100644
--- a/asterix-app/src/test/resources/runtimets/results/hdfs/issue_245_hdfs/issue_245_hdfs.1.adm
+++ b/asterix-app/src/test/resources/runtimets/results/hdfs/issue_245_hdfs/issue_245_hdfs.1.adm
@@ -1,4 +1,4 @@
+{ "line": "ASTERIX is taking an open stance on data formats and addressing research issues including highly scalable data storage and indexing, semi-structured query processing on very large clusters, and merging parallel database techniques with todays data-intensive computing techniques to support performant yet declarative solutions to the problem of analyzing semi-structured information" }
+{ "line": "ASTERIX targets a wide range of semi-structured information, ranging from data use cases where information is well-tagged and highly regular to content use cases where data is irregular and much of each datum is textual" }
 { "line": "The ASTERIX project is developing new technologies for ingesting, storing, managing, indexing, querying, analyzing, and subscribing to vast quantities of semi-structured information" }
 { "line": "The project is combining ideas from three distinct areas semi-structured data, parallel databases, and data-intensive computing  to create a next-generation, open source software platform that scales by running on large, shared-nothing commodity computing clusters" }
-{ "line": "ASTERIX targets a wide range of semi-structured information, ranging from data use cases where information is well-tagged and highly regular to content use cases where data is irregular and much of each datum is textual" }
-{ "line": "ASTERIX is taking an open stance on data formats and addressing research issues including highly scalable data storage and indexing, semi-structured query processing on very large clusters, and merging parallel database techniques with todays data-intensive computing techniques to support performant yet declarative solutions to the problem of analyzing semi-structured information" }
diff --git a/asterix-app/src/test/resources/runtimets/results/open-closed/query-issue456/query-issue456.1.adm b/asterix-app/src/test/resources/runtimets/results/open-closed/query-issue456/query-issue456.1.adm
new file mode 100644
index 0000000..0ca7b82
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/open-closed/query-issue456/query-issue456.1.adm
@@ -0,0 +1,2 @@
+[ 1, 8 ]
+[ 2, 8 ]
diff --git a/asterix-app/src/test/resources/runtimets/results/open-closed/query-issue465/query-issue465.1.adm b/asterix-app/src/test/resources/runtimets/results/open-closed/query-issue465/query-issue465.1.adm
new file mode 100644
index 0000000..15c3035
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/open-closed/query-issue465/query-issue465.1.adm
@@ -0,0 +1 @@
+[ { "r1": 1234 }, { "r2": 456 } ]
diff --git a/asterix-app/src/test/resources/runtimets/results/user-defined-functions/query-issue489/query-issue489.2.adm b/asterix-app/src/test/resources/runtimets/results/user-defined-functions/query-issue489/query-issue489.2.adm
new file mode 100644
index 0000000..0cfbf08
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/user-defined-functions/query-issue489/query-issue489.2.adm
@@ -0,0 +1 @@
+2
diff --git a/asterix-app/src/test/resources/runtimets/results/user-defined-functions/query-issue489/query-issue489.4.adm b/asterix-app/src/test/resources/runtimets/results/user-defined-functions/query-issue489/query-issue489.4.adm
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/user-defined-functions/query-issue489/query-issue489.4.adm
@@ -0,0 +1 @@
+0
diff --git a/asterix-app/src/test/resources/runtimets/testsuite.xml b/asterix-app/src/test/resources/runtimets/testsuite.xml
index 12e3ba6..bc47f57 100644
--- a/asterix-app/src/test/resources/runtimets/testsuite.xml
+++ b/asterix-app/src/test/resources/runtimets/testsuite.xml
@@ -2771,12 +2771,22 @@
     </test-case>
     <test-case FilePath="open-closed">
       <compilation-unit name="query-issue453">
-	<output-dir compare="Text">query-issue453</output-dir>
+        <output-dir compare="Text">query-issue453</output-dir>
       </compilation-unit>
     </test-case>
     <test-case FilePath="open-closed">
       <compilation-unit name="query-issue453-2">
-	<output-dir compare="Text">query-issue453-2</output-dir>
+        <output-dir compare="Text">query-issue453-2</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="open-closed">
+      <compilation-unit name="query-issue456"> 
+        <output-dir compare="Text">query-issue456</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="open-closed">
+      <compilation-unit name="query-issue465"> 
+        <output-dir compare="Text">query-issue465</output-dir>
       </compilation-unit>
     </test-case>
     <test-case FilePath="open-closed">
@@ -4025,6 +4035,11 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="user-defined-functions">
+      <compilation-unit name="query-issue489">
+        <output-dir compare="Text">query-issue489</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="user-defined-functions">
       <compilation-unit name="udf01">
         <output-dir compare="Text">udf01</output-dir>
       </compilation-unit>
diff --git a/asterix-common/pom.xml b/asterix-common/pom.xml
index db20c29..fa48b9e 100644
--- a/asterix-common/pom.xml
+++ b/asterix-common/pom.xml
@@ -114,6 +114,16 @@
 			<version>4.8.1</version>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>com.fasterxml.jackson.core</groupId>
+			<artifactId>jackson-core</artifactId>
+			<version>2.2.0</version>
+		</dependency>
+		<dependency>
+			<groupId>org.codehaus.jackson</groupId>
+			<artifactId>jackson-mapper-asl</artifactId>
+			<version>1.9.12</version>
+		</dependency>
 	</dependencies>
 
 </project>
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixThreadExecutor.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixThreadExecutor.java
new file mode 100644
index 0000000..14975ff
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixThreadExecutor.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2009-2013 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.common.api;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+
+public class AsterixThreadExecutor implements Executor {
+    public final static AsterixThreadExecutor INSTANCE = new AsterixThreadExecutor();
+    private final Executor executor = Executors.newCachedThreadPool(AsterixThreadFactory.INSTANCE);
+
+    private AsterixThreadExecutor() {
+
+    }
+
+    @Override
+    public void execute(Runnable command) {
+        executor.execute(command);
+    }
+}
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixThreadFactory.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixThreadFactory.java
new file mode 100644
index 0000000..7e4735f
--- /dev/null
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/api/AsterixThreadFactory.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2009-2012 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.common.api;
+
+import java.util.concurrent.ThreadFactory;
+
+import edu.uci.ics.hyracks.api.lifecycle.LifeCycleComponentManager;
+
+public class AsterixThreadFactory implements ThreadFactory {
+
+    public final static AsterixThreadFactory INSTANCE = new AsterixThreadFactory();
+
+    private AsterixThreadFactory() {
+
+    }
+
+    @Override
+    public Thread newThread(Runnable r) {
+        Thread t;
+        if ((r instanceof Thread)) {
+            t = (Thread) r;
+        } else {
+            t = new Thread(r);
+        }
+        t.setUncaughtExceptionHandler(LifeCycleComponentManager.INSTANCE);
+        return t;
+    }
+
+}
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/config/AsterixMetadataProperties.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/config/AsterixMetadataProperties.java
index 6d47e78..6b6cded 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/config/AsterixMetadataProperties.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/config/AsterixMetadataProperties.java
@@ -24,5 +24,9 @@
     public Set<String> getNodeNames() {
         return accessor.getNodeNames();
     }
+    
+    public String getCoredumpPath(String nodeId){
+        return accessor.getCoredumpPath(nodeId);
+    }
 
 }
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/config/AsterixPropertiesAccessor.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/config/AsterixPropertiesAccessor.java
index 7b2f2a6..d623ae5 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/config/AsterixPropertiesAccessor.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/config/AsterixPropertiesAccessor.java
@@ -16,6 +16,7 @@
 import javax.xml.bind.Unmarshaller;
 
 import edu.uci.ics.asterix.common.configuration.AsterixConfiguration;
+import edu.uci.ics.asterix.common.configuration.Coredump;
 import edu.uci.ics.asterix.common.configuration.Property;
 import edu.uci.ics.asterix.common.configuration.Store;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
@@ -26,6 +27,7 @@
     private final String metadataNodeName;
     private final Set<String> nodeNames;
     private final Map<String, String[]> stores;
+    private final Map<String, String> coredumpConfig;
     private final Map<String, Property> asterixConfigurationParams;
 
     public AsterixPropertiesAccessor() throws AsterixException {
@@ -64,6 +66,11 @@
         for (Property p : asterixConfiguration.getProperty()) {
             asterixConfigurationParams.put(p.getName(), p);
         }
+        coredumpConfig = new HashMap<String, String>();
+        for (Coredump cd : asterixConfiguration.getCoredump()) {
+            coredumpConfig.put(cd.getNcId(), cd.getCoredumpPath());
+        }
+
     }
 
     public String getMetadataNodeName() {
@@ -82,6 +89,10 @@
         return nodeNames;
     }
 
+    public String getCoredumpPath(String nodeId) {
+        return coredumpConfig.get(nodeId);
+    }
+
     public <T> T getProperty(String property, T defaultValue, IPropertyInterpreter<T> interpreter) {
         Property p = asterixConfigurationParams.get(property);
         if (p == null) {
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogManager.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogManager.java
index 9470d17..c90422c 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogManager.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ILogManager.java
@@ -50,12 +50,10 @@
             ACIDException;
 
     /**
-     * @param logicalLogLocator
+     * @param lsnValue
      *            TODO
      * @param logicalLogLocator
      *            TODO
-     * @param PhysicalLogLocator
-     *            specifies the location of the log record to be read
      * @throws ACIDException
      */
     public void readLog(long lsnValue, LogicalLogLocator logicalLogLocator) throws ACIDException;
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionContext.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionContext.java
index a06cc75..a7f2984 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionContext.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionContext.java
@@ -1,7 +1,6 @@
 package edu.uci.ics.asterix.common.transactions;
 
 import edu.uci.ics.asterix.common.exceptions.ACIDException;
-import edu.uci.ics.asterix.common.transactions.ITransactionContext.TransactionType;
 import edu.uci.ics.asterix.common.transactions.ITransactionManager.TransactionState;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMIndex;
@@ -42,6 +41,8 @@
 
     public void setTransactionType(TransactionType transactionType);
 
+    public String prettyPrint();
+
     public static final long INVALID_TIME = -1l; // used for showing a
     // transaction is not waiting.
     public static final int ACTIVE_STATUS = 0;
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionManager.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionManager.java
index 2bfc00d..e57cc64 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionManager.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/ITransactionManager.java
@@ -120,5 +120,4 @@
      */
     public ITransactionSubsystem getTransactionProvider();
 
-
 }
diff --git a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogManagerProperties.java b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogManagerProperties.java
index 4dc943c..89816aa 100644
--- a/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogManagerProperties.java
+++ b/asterix-common/src/main/java/edu/uci/ics/asterix/common/transactions/LogManagerProperties.java
@@ -105,7 +105,7 @@
     public String getLogDirKey() {
         return logDirKey;
     }
-    
+
     public int getDiskSectorSize() {
         return diskSectorSize;
     }
diff --git a/asterix-common/src/main/resources/schema/asterix-conf.xsd b/asterix-common/src/main/resources/schema/asterix-conf.xsd
index f53fb4b..5aefdbd 100644
--- a/asterix-common/src/main/resources/schema/asterix-conf.xsd
+++ b/asterix-common/src/main/resources/schema/asterix-conf.xsd
@@ -7,6 +7,7 @@
 
         
 	<xs:element name="metadataNode" type="xs:string" />
+	<xs:element name="coredumpPath" type="xs:string" />
 	<xs:element name="storeDirs" type="xs:string" />
 	<xs:element name="ncId" type="xs:string" />
 	<xs:element name="name" type="xs:string" />
@@ -23,6 +24,15 @@
 		</xs:complexType>
 	</xs:element>
 
+	<xs:element name="coredump">
+		<xs:complexType>
+			<xs:sequence>
+				<xs:element ref="mg:ncId" />
+				<xs:element ref="mg:coredumpPath" />
+			</xs:sequence>
+		</xs:complexType>
+	</xs:element>
+
 	<xs:element name="property">
 		<xs:complexType>
 			<xs:sequence>
@@ -39,6 +49,7 @@
 			<xs:sequence>
 				<xs:element ref="mg:metadataNode" minOccurs="0"/>
 				<xs:element ref="mg:store" maxOccurs="unbounded" />
+				<xs:element ref="mg:coredump" maxOccurs="unbounded" />
 				<xs:element ref="mg:property" minOccurs="0" maxOccurs="unbounded" />
 			</xs:sequence>
 		</xs:complexType>
diff --git a/asterix-common/src/test/java/edu/uci/ics/asterix/test/aql/TestsUtils.java b/asterix-common/src/test/java/edu/uci/ics/asterix/test/aql/TestsUtils.java
index 5e599c3..ac8a3bd 100644
--- a/asterix-common/src/test/java/edu/uci/ics/asterix/test/aql/TestsUtils.java
+++ b/asterix-common/src/test/java/edu/uci/ics/asterix/test/aql/TestsUtils.java
@@ -9,13 +9,13 @@
 import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
-import java.util.Iterator;
 import java.util.List;
-import java.util.NoSuchElementException;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
@@ -24,10 +24,15 @@
 import org.apache.commons.httpclient.NameValuePair;
 import org.apache.commons.httpclient.methods.GetMethod;
 import org.apache.commons.httpclient.params.HttpMethodParams;
-import org.json.JSONArray;
+import org.codehaus.jackson.map.JsonMappingException;
 import org.json.JSONException;
 import org.json.JSONObject;
 
+import com.fasterxml.jackson.core.JsonFactory;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonToken;
+
+import edu.uci.ics.asterix.common.config.GlobalConfig;
 import edu.uci.ics.asterix.testframework.context.TestCaseContext;
 import edu.uci.ics.asterix.testframework.context.TestFileContext;
 import edu.uci.ics.asterix.testframework.xml.TestCase.CompilationUnit;
@@ -135,84 +140,46 @@
         return fname.substring(0, dot + 1) + EXTENSION_AQL_RESULT;
     }
 
-    public static void writeResultsToFile(File actualFile, JSONObject result) throws IOException, JSONException {
+    public static void writeResultsToFile(File actualFile, InputStream resultStream) throws IOException, JSONException {
         BufferedWriter writer = new BufferedWriter(new FileWriter(actualFile));
-        Results res = new Results(result);
-        for (String line : res) {
-            writer.write(line);
-            writer.newLine();
-        }
-        writer.close();
-    }
-
-    public static class Results implements Iterable<String> {
-        private final JSONArray chunks;
-
-        public Results(JSONObject result) throws JSONException {
-            chunks = result.getJSONArray("results");
-        }
-
-        public Iterator<String> iterator() {
-            return new ResultIterator(chunks);
+        try {
+            JsonFactory jsonFactory = new JsonFactory();
+            JsonParser resultParser = jsonFactory.createParser(resultStream);
+            while (resultParser.nextToken() == JsonToken.START_OBJECT) {
+                while (resultParser.nextToken() != JsonToken.END_OBJECT) {
+                    String key = resultParser.getCurrentName();
+                    if (key.equals("results")) {
+                        // Start of array.
+                        resultParser.nextToken();
+                        while (resultParser.nextToken() != JsonToken.END_ARRAY) {
+                            String record = resultParser.getValueAsString();
+                            writer.write(record);
+                        }
+                    } else {
+                        String summary = resultParser.getValueAsString();
+                        if (key.equals("summary")) {
+                            writer.write(summary);
+                            throw new JsonMappingException("Could not find results key in the JSON Object");
+                        }
+                    }
+                }
+            }
+        } finally {
+            writer.close();
         }
     }
 
-    public static class ResultIterator implements Iterator<String> {
-        private final JSONArray chunks;
-
-        private int chunkCounter = 0;
-        private int recordCounter = 0;
-
-        public ResultIterator(JSONArray chunks) {
-            this.chunks = chunks;
-        }
-
-        @Override
-        public boolean hasNext() {
-            JSONArray resultArray;
-            try {
-                resultArray = chunks.getJSONArray(chunkCounter);
-                if (resultArray.getString(recordCounter) != null) {
-                    return true;
-                }
-            } catch (JSONException e) {
-                return false;
-            }
-            return false;
-        }
-
-        @Override
-        public String next() throws NoSuchElementException {
-            JSONArray resultArray;
-            String item = "";
-
-            try {
-                resultArray = chunks.getJSONArray(chunkCounter);
-                item = resultArray.getString(recordCounter);
-                if (item == null) {
-                    throw new NoSuchElementException();
-                }
-                item = item.trim();
-
-                recordCounter++;
-                if (recordCounter >= resultArray.length()) {
-                    chunkCounter++;
-                    recordCounter = 0;
-                }
-            } catch (JSONException e) {
-                throw new NoSuchElementException(e.getMessage());
-            }
-            return item;
-        }
-
-        @Override
-        public void remove() {
-            throw new UnsupportedOperationException();
-        }
+    private static String[] handleError(GetMethod method) throws Exception {
+        String errorBody = method.getResponseBodyAsString();
+        JSONObject result = new JSONObject(errorBody);
+        String[] errors = { result.getJSONArray("error-code").getString(0), result.getString("summary"),
+                result.getString("stacktrace") };
+        return errors;
     }
 
     // Executes Query and returns results as JSONArray
-    public static JSONObject executeQuery(String str) throws Exception {
+    public static InputStream executeQuery(String str) throws Exception {
+        InputStream resultStream = null;
 
         final String url = "http://localhost:19101/query";
 
@@ -227,26 +194,22 @@
         // Provide custom retry handler is necessary
         method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler(3, false));
 
-        JSONObject result = null;
-
         try {
             // Execute the method.
             int statusCode = client.executeMethod(method);
 
             // Check if the method was executed successfully.
             if (statusCode != HttpStatus.SC_OK) {
-                System.err.println("Method failed: " + method.getStatusLine());
+                GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, "Method failed: " + method.getStatusLine());
             }
 
-            // Read the response body as String.
-            String responseBody = method.getResponseBodyAsString();
-
-            result = new JSONObject(responseBody);
+            // Read the response body as stream
+            resultStream = method.getResponseBodyAsStream();
         } catch (Exception e) {
-            System.out.println(e.getMessage());
+            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, e.getMessage(), e);
             e.printStackTrace();
         }
-        return result;
+        return resultStream;
     }
 
     // To execute Update statements
@@ -270,7 +233,10 @@
 
         // Check if the method was executed successfully.
         if (statusCode != HttpStatus.SC_OK) {
-            System.err.println("Method failed: " + method.getStatusLine());
+            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, "Method failed: " + method.getStatusLine());
+            String[] errors = handleError(method);
+            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, errors[2]);
+            throw new Exception("DDL operation failed: " + errors[0]);
         }
     }
 
@@ -299,7 +265,10 @@
 
         // Check if the method was executed successfully.
         if (statusCode != HttpStatus.SC_OK) {
-            System.err.println("Method failed: " + method.getStatusLine());
+            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, "Method failed: " + method.getStatusLine());
+            String[] errors = handleError(method);
+            GlobalConfig.ASTERIX_LOGGER.log(Level.SEVERE, errors[2]);
+            throw new Exception("DDL operation failed: " + errors[0]);
         }
     }
 
@@ -342,7 +311,7 @@
 
         List<CompilationUnit> cUnits = testCaseCtx.getTestCase().getCompilationUnit();
         for (CompilationUnit cUnit : cUnits) {
-            
+
             testFileCtxs = testCaseCtx.getTestFiles(cUnit);
             expectedResultFileCtxs = testCaseCtx.getExpectedResultFiles(cUnit);
 
@@ -358,24 +327,24 @@
                             TestsUtils.executeUpdate(statement);
                             break;
                         case "query":
-                            result = TestsUtils.executeQuery(statement);
-                            if (result.has("error-code")) {
-                                throw new Exception("Test \"" + testFile + "\" FAILED!\n" + result + "\n");
-                            } else {
+                            try {
+                                InputStream resultStream = executeQuery(statement);
                                 expectedResultFile = expectedResultFileCtxs.get(queryCount).getFile();
 
                                 File actualFile = new File(actualPath + File.separator
                                         + testCaseCtx.getTestCase().getFilePath().replace(File.separator, "_") + "_"
                                         + cUnit.getName() + ".adm");
+                                TestsUtils.writeResultsToFile(actualFile, resultStream);
 
                                 File actualResultFile = testCaseCtx.getActualResultFile(cUnit, new File(actualPath));
                                 actualResultFile.getParentFile().mkdirs();
 
-                                TestsUtils.writeResultsToFile(actualFile, result);
-
                                 TestsUtils.runScriptAndCompareWithResult(testFile, new PrintWriter(System.err),
                                         expectedResultFile, actualFile);
-                                LOGGER.info("[TEST]: " + testCaseCtx.getTestCase().getFilePath() + "/" + cUnit.getName() +  " PASSED ");
+                                LOGGER.info("[TEST]: " + testCaseCtx.getTestCase().getFilePath() + "/"
+                                        + cUnit.getName() + " PASSED ");
+                            } catch (JsonMappingException e) {
+                                throw new Exception("Test \"" + testFile + "\" FAILED!\n");
                             }
                             queryCount++;
                             break;
@@ -385,7 +354,7 @@
                         default:
                             throw new IllegalArgumentException("No statements of type " + ctx.getType());
                     }
-                    
+
                 } catch (Exception e) {
                     if (cUnit.getExpectedError().isEmpty()) {
                         throw new Exception("Test \"" + testFile + "\" FAILED!", e);
@@ -393,7 +362,6 @@
                 }
             }
         }
-
     }
 }
 
diff --git a/asterix-doc/pom.xml b/asterix-doc/pom.xml
index d987e5f..4b8cb2f 100644
--- a/asterix-doc/pom.xml
+++ b/asterix-doc/pom.xml
@@ -1,21 +1,21 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
-	<parent>
-		<artifactId>asterix</artifactId>
-		<groupId>edu.uci.ics.asterix</groupId>
-		<version>0.0.6-SNAPSHOT</version>
-	</parent>
-	<artifactId>asterix-doc</artifactId>
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-site-plugin</artifactId>
-				<version>3.3</version>
-				<configuration>
-				  <generateReports>false</generateReports>
-				</configuration>
-			</plugin>
-		</plugins>
-	</build>
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <artifactId>asterix</artifactId>
+    <groupId>edu.uci.ics.asterix</groupId>
+    <version>0.0.6-SNAPSHOT</version>
+  </parent>
+  <artifactId>asterix-doc</artifactId>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-site-plugin</artifactId>
+        <version>3.3</version>
+        <configuration>
+          <generateReports>false</generateReports>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
 </project>
diff --git a/asterix-doc/src/site/markdown/AsterixAlphaRelease.md b/asterix-doc/src/site/markdown/AsterixAlphaRelease.md
deleted file mode 100644
index ff9efb2..0000000
--- a/asterix-doc/src/site/markdown/AsterixAlphaRelease.md
+++ /dev/null
@@ -1,57 +0,0 @@
-# AsterixDB: A Big Data Management System _(Alpha Release)_ #
-
-## What Is AsterixDB? ##
-
-Welcome to the new home of the AsterixDB Big Data Management System (BDMS).
-The AsterixDB BDMS is the result of about 3.5 years of R&D involving researchers at UC Irvine, UC Riverside, and UC San Diego.
-The AsterixDB code base now consists of roughly 250K lines of Java code that has been co-developed at UC Irvine and UC Riverside.
-
-Initiated in 2009, the NSF-sponsored ASTERIX project has been developing new technologies for ingesting, storing, managing, indexing, querying, and analyzing vast quantities of semi-structured information.
-The project has been combining ideas from three distinct areas---semi-structured data, parallel databases, and data-intensive computing (a.k.a. today's Big Data platforms)---in order to create a next-generation, open-source software platform that scales by running on large, shared-nothing commodity computing clusters.
-The ASTERIX effort has been targeting a wide range of semi-structured information, ranging from "data" use cases---where information is well-typed and highly regular---to "content" use cases---where data tends to be irregular, much of each datum may be textual, and the ultimate schema for the various data types involved may be hard to anticipate up front.
-The ASTERIX project has been addressing technical issues including highly scalable data storage and indexing, semi-structured query processing on very large clusters, and merging time-tested parallel database techniques with modern data-intensive computing techniques to support performant yet declarative solutions to the problem of storing and analyzing semi-structured information effectively.
-The first fruits of this labor have been captured in the AsterixDB system that is now being released in preliminary or "Alpha" release form.
-We are hoping that the arrival of AsterixDB will mark the beginning of the "BDMS era", and we hope that both the Big Data community and the database community will find the AsterixDB system to be interesting and useful for a much broader class of problems than can be addressed with any one of today's current Big Data platforms and related technologies (e.g., Hadoop, Pig, Hive, HBase, MongoDB, and so on).  One of our project mottos has been "one size fits a bunch"---at least that has been our aim.  For more information about the research effort that led to the birth of AsterixDB, please refer to our NSF project web site: [http://asterix.ics.uci.edu/](http://asterix.ics.uci.edu/).
-
-In a nutshell, AsterixDB is a full-function BDMS with a rich feature set that distinguishes it from pretty much any other Big Data platform that's out and available today.  We believe that its feature set makes it well-suited to modern needs such as web data warehousing and social data storage and analysis.  AsterixDB has:
-
- * A semistructured NoSQL style data model (ADM) resulting from extending JSON with object database ideas
- * An expressive and declarative query language (AQL) that supports a broad range of queries and analysis over semistructured data
- * A parallel runtime query execution engine, Hyracks, that has been scale-tested on up to 1000+ cores and 500+ disks
- * Partitioned LSM-based data storage and indexing to support efficient ingestion and management of semistructured data
- * Support for query access to externally stored data (e.g., data in HDFS) as well as to data stored natively by AsterixDB
- * A rich set of primitive data types, including spatial and temporal data in addition to integer, floating point, and textual data
- * Secondary indexing options that include B+ trees, R trees, and inverted keyword (exact and fuzzy) index types
- * Support for fuzzy and spatial queries as well as for more traditional parametric queries
- * Basic transactional (concurrency and recovery) capabilities akin to those of a NoSQL store
-
-## Getting and Using AsterixDB ##
-
-You are most likely here because you are interested in getting your hands on AsterixDB---so you would like to know how to get it, how to set it up, and how to use it.
-Someday our plan is to have comprehensive documentation for AsterixDB and its data model (ADM) and query language (AQL) here on this wiki.
-For the Alpha release, we've got a start; for the Beta release a month or so from now, we will hopefully have much more.
-The following is a list of the wiki pages and supporting documents that we have available today:
-
-1. [InstallingAsterixUsingManagix](InstallingAsterixUsingManagix.html) :
-This is our installation guide, and it is where you should start.
-This document will tell you how to obtain, install, and manage instances of [AsterixDB](https://asterixdb.googlecode.com/files/asterix-installer-0.0.4-binary-assembly.zip), including both single-machine setup (for developers) as well as cluster installations (for deployment in its intended form).
-
-2. [AdmAql101](AdmAql101.html) :
-This is a first-timers introduction to the user model of the AsterixDB BDMS, by which we mean the view of AsterixDB as seen from the perspective of an "average user" or Big Data application developer.
-The AsterixDB user model consists of its data modeling features (ADM) and its query capabilities (AQL).
-This document presents a tiny "social data warehousing" example and uses it as a backdrop for describing, by example, the key features of AsterixDB.
-By working through this document, you will learn how to define the artifacts needed to manage data in AsterixDB, how to load data into the system, how to use most of the basic features of its query language, and how to insert and delete data dynamically.
-
-3. [AsterixDataTypesAndFunctions](AsterixDataTypesAndFunctions.html) :
-This is a reference document that catalogs the primitive data types and built-in functions available for use in AsterixDB schemas (in ADM) and queries (in AQL).
-
-4. [AQL Reference](AsterixQueryLanguageReference.html) :
-This is the AQL language reference manual.
-
-5. [AsterixDBRestAPI](AsterixDBRestAPI.html) :
-Access to data in an AsterixDB instance is provided via a REST-based API.
-This is a short document that describes the REST API entry points and their URL syntax.
-
-To all who have now come this far: Thanks for your interest in AsterixDB, and for kicking its tires in its Alpha form
-In addition to getting the system and trying it out, please sign up as a member of the AsterixDB user mailing list (asterixdb-users (at) googlegroups.com) so that you can contact us easily with your questions, issues, and other feedback.
-We want AsterixDB to be a "big hit" some day, and we are anxious to see what users do with it and to learn from that feedback what we should be working on most urgently in the next phase of the project.
diff --git a/asterix-doc/src/site/markdown/AsterixQueryLanguage.md b/asterix-doc/src/site/markdown/AsterixQueryLanguage.md
deleted file mode 100644
index af25cda..0000000
--- a/asterix-doc/src/site/markdown/AsterixQueryLanguage.md
+++ /dev/null
@@ -1,195 +0,0 @@
-`<wiki:toc max_depth="2" />`
-
-# The Asterix Query Language, Version 1.0 #
-
-# Introduction #
-
-This wiki page provides an overview of the Asterix Query language and the Asterix Data model.
-
-*WARNING:* _THIS IS AN INCOMPLETE SUSPENDED WORK IN PROGRESS...
-_  It will hopefully be resumed shortly in order to produce a legit AQL spec to go out with the Beta Release of AsterixDB.  What's here is very likely inconsistent with what's in the system as of today, as this was from an older snapshot of the world.
-
-# Asterix Data Model #
-
-Data in Asterix is represented using the Asterix Data Model (ADM). The ADM derives inspiration from prior standards such as JSON, XQuery, and the Object Data Model from ODMG.
-
-## Asterix Types ##
-
-### Primitive Types ##
-
-|| *Primitive Type* || *Description* ||
-|| int8   || Signed 8-bit integer. Valid range -128 thru 127 ||
-|| int16  || Signed 16-bit integer. Valid range -32768 thru 32767 ||
-|| int32  || Signed 32-bit integer. Valid range -2147483648 thru 2147483647 ||
-|| int64  || Signed 64-bit integer. Valid range -9223372036854775807 thru 9223372036854775808 ||
-|| uint8  || Unsigned 8-bit integer. Valid range 0 thru 255 ||
-|| uint16 || Unsigned 16-bit integer. Valid range 0 thru 65535 ||
-|| uint32 || Unsigned 32-bit integer. Valid range 0 thru 4294967295 ||
-|| uint64 || Unsigned 64-bit integer. Valid range 0 thru 18446744073709551615 ||
-|| string || String of characters ||
-|| null   || null type (Type of the null value) ||
-|| date   || Date ||
-|| time   || Time of day ||
-|| boolean || Boolean ||
-|| datetime || Date and time ||
-|| point2d || A point in 2-D space ||
-|| point3d || A point in 3-D space ||
-|| binary || Binary data ||
-|| yminterval || Year-Month interval ||
-|| dtinterval || Day-Time interval ||
-|| interval || Year-Month and Day-Time interval ||
-
-### Collection Types ###
-
-|| *Collection Type* || *Description* ||
-|| Record || A record type describes the record data item. A record contains a set of fields which can have values of any ADM type. Fields of a record must be unique. ||
-|| Union || A union type is an abstract type (A value never has a union type) that describes a set of type choices. ||
-|| Ordered List || An orderedlist instance represents a sequence of values where the order of the instances is determined by creation/insertion ||
-|| UnorderedList || An unorderedlist instance represents a collection of values where the order of the instances where the order is irrelevant ||
-|| Enumeration || An enumeration type represents a choice of string values ||
-
-# AQL Expressions #
-
-## Primary Expressions ##
-
-Primary expressions are the basic expressions that form the core of AQL.
-
-### Literals ###
-
-A Literal is a syntactic representation of a constant value. The various literals allowed in AQL are described in the table below.
-
-|| *Literal type* || *Syntax* ||
-|| StringLiteral || ` STRING_LITERAL : ("\"" ("\\\"" | ~["\""])* "\"") | ("\'"("\\\'" | ~["\'"])* "\'") ` ||
-|| IntegerLiteral || ` INTEGER_LITERAL : (["0" - "9"])+ ` ||
-|| FloatLiteral || ` FLOAT_LITERAL: ((["0" - "9"])* "." (["0" - "9"])+ ("f" | "F")) ` ||
-|| DoubleLiteral || ` DOUBLE_LITERAL: ((["0" - "9"])* "." (["0" - "9"])+) ` ||
-|| NullLiteral || ` NULL_LITERAL: "null" ` ||
-|| BooleanLiteral || ` BOOLEAN_LITERAL: "true" | "false" ` ||
-
-### Function Call ###
-
-Function Calls in AQL can be used to invoke builtin functions as well as user defined functions.
-Function Calls have the following syntax.
-
-
-            IDENTIFIER "(" ( Expression ( "," Expression )* )? ")"
-
-
-### Variable Reference ###
-
-Variables in AQL are used to bind to values. Variables can be bound to values by the For, Let, Group by clauses of the FLWOR expressions. Variables can also be bound by
-the Quantified Expressions.
-
-### Ordered List Constructor ###
-
-Constructs an ordered list. An ordered list represents a collection of values. The order of values is relevant. The collection may contain duplicate values.
-
-### Unordered List Constructor ###
-
-Constructs an unordered list. An unordered list represents a collection of values. The order of values is not relevant. The collection may contain duplicate values.
-
-### Record Constructor ###
-
-Constructs an AQL Record. A record contains fields. Each field has a name and a value. The name of the field is of type string. The value of a field may be any legal ADM data type. A record may not contain duplicate fields.
-
-## Arithmetic Expressions ##
-
-AQL allows all the standard arithmetic operators on numeric data types. The specific operators allowed are:
-
-|| *Operator* || *Description* ||
-|| + || Add ||
-|| - || Subtract ||
-|| * || Multiply ||
-|| / || Divide ||
-|| mod || Modulo ||
-
-## Comparison Expressions ##
-
-AQL provides the six standard comparison expressions listed below. In addition, AQL supports fuzzy comparisons.
-
-|| *Operator* || *Description* ||
-|| = || Equal ||
-|| = || Not Equal ||
-|| `< || Less Than ||
-|| `<= || Less Than or Equal ||
-|| >` || Greater Than ||
-|| >`= || Greater Than or Equal ||
-|| >`= || Greater Than or Equal ||
-|| ~= || Fuzzy Equals ||
-
-## Logical Expressions ##
-
-AQL provides two logical connectors:
-
-|| *Operator* || *Description* ||
-|| and || Logical AND ||
-|| or || Logical OR ||
-
-## Field Access Expressions ##
-
-The "." operator is used to access fields of a record. For example,
-
-
-            $x.name
-
-
-accesses the name field of the record bound to $x.
-
-## Indexed Expressions ##
-
-Indexed expressions are used to access values in an ordered list. For example,
-
-
-            $x[5]
-
-
-accesses the 6th item in the list bound to $x. Indexes start at 0.
-
-## FLWOR Expression ##
-
-The FLWOR expression is the most elaborate expression in AQL. It is made up of two parts -- Clauses and the Return Expression.
-
-The syntax of the FLWOR expression is:
-
-
-        
-        ( ForClause | LetClause )
-        ( ForClause | LetClause | WhereClause | OrderClause | GroupClause | LimitClause | DistinctClause )*
-        "return" ReturnExpression
-        
-
-
-* For Clause
-
-        "for" Variable "in" Expression
-
-* Let Clause
-
-        "let" Variable ":=" Expression
-
-* Where Clause
-
-        "where" Expression
-
-* Order Clause
-
-        "order" "by" Expression ("asc" | "desc") ("," Expression ("asc" | "desc"))*
-
-* Group Clause
-
-        "group" "by" ((Variable ":=")? Expression) ("," ((Variable ":=")? Expression))* "with" Variable
-
-* Limit Clause
-
-        "limit" Expression ("," Expression)?
-
-
-* If Then Else Expressions *
-
-        "if" "(" Expression ")" "then" Expression "else" Expression
-
-
-* Quantified Expressions *
-
-        ("some" | "every") Variable "in" Expression "satisfies" Expression
-
diff --git a/asterix-doc/src/site/markdown/AsterixDBRestAPI.md b/asterix-doc/src/site/markdown/api.md
similarity index 100%
rename from asterix-doc/src/site/markdown/AsterixDBRestAPI.md
rename to asterix-doc/src/site/markdown/api.md
diff --git a/asterix-doc/src/site/markdown/AsterixDBDataModel.md b/asterix-doc/src/site/markdown/aql/datamodel.md
similarity index 83%
rename from asterix-doc/src/site/markdown/AsterixDBDataModel.md
rename to asterix-doc/src/site/markdown/aql/datamodel.md
index 2b3523f..3e54d61 100644
--- a/asterix-doc/src/site/markdown/AsterixDBDataModel.md
+++ b/asterix-doc/src/site/markdown/aql/datamodel.md
@@ -1,12 +1,12 @@
 # Asterix Data Model (ADM) #
 
 
-An instance of Asterix data model (ADM) can be a _*primitive type*_ (`Int32`, `Int64`, `String`, `Float`, `Double`, `Date`, `Time`, `Datetime`, etc. or `NULL`) or a _*derived type*_.
+An instance of Asterix data model (ADM) can be a _*primitive type*_ (`int32`, `int64`, `string`, `float`, `double`, `date`, `time`, `datetime`, etc. or `null`) or a _*derived type*_.
 
 ## Primitive Types ##
 
 ### Boolean ###
-`Boolean` data type can have one of the two values: _*true*_ or _*false*_.
+`boolean` data type can have one of the two values: _*true*_ or _*false*_.
 
  * Example:
 
@@ -24,10 +24,10 @@
 ### Int8 / Int16 / Int32 / Int64 ###
 Integer types using 8, 16, 32, or 64 bits. The ranges of these types are:
 
-- `Int8`: -127 to 127
-- `Int16`: -32767 to 32767
-- `Int32`: -2147483647 to 2147483647
-- `Int64`: -9223372036854775808 to 9223372036854775807
+- `int8`: -127 to 127
+- `int16`: -32767 to 32767
+- `int32`: -2147483647 to 2147483647
+- `int64`: -9223372036854775808 to 9223372036854775807
 
  * Example:
 
@@ -44,7 +44,7 @@
 
 
 ### Float ###
-`Float` represents approximate numeric data values using 4 bytes. The range of a float value can be from 2^(-149) to (2-2^(-23)·2^(127) for both positive and negative. Beyond these ranges will get `INF` or `-INF`.
+`float` represents approximate numeric data values using 4 bytes. The range of a float value can be from 2^(-149) to (2-2^(-23)·2^(127) for both positive and negative. Beyond these ranges will get `INF` or `-INF`.
 
  * Example:
 
@@ -61,7 +61,7 @@
 
 
 ### Double ###
-`Double` represents approximate numeric data values using 8 bytes. The range of a double value can be from (2^(-1022)) to (2-2^(-52))·2^(1023) for both positive and negative. Beyond these ranges will get `INF` or `-INF`.
+`double` represents approximate numeric data values using 8 bytes. The range of a double value can be from (2^(-1022)) to (2-2^(-52))·2^(1023) for both positive and negative. Beyond these ranges will get `INF` or `-INF`.
 
  * Example:
 
@@ -78,7 +78,7 @@
 
 
 ### String ###
-`String` represents a sequence of characters.
+`string` represents a sequence of characters.
 
  * Example:
 
@@ -93,7 +93,7 @@
 
 
 ### Point ###
-`Point` is the fundamental two-dimensional building block for spatial types. It consists of two `double` coordinates x and y.
+`point` is the fundamental two-dimensional building block for spatial types. It consists of two `double` coordinates x and y.
 
  * Example:
 
@@ -108,7 +108,7 @@
 
 
 ### Line ###
-`Line` consists of two points that represent the start and the end points of a line segment.
+`line` consists of two points that represent the start and the end points of a line segment.
 
  * Example:
 
@@ -123,7 +123,7 @@
 
 
 ### Rectangle ###
-`Rectangle` consists of two points that represent the _*bottom left*_ and _*upper right*_ corners of a rectangle.
+`rectangle` consists of two points that represent the _*bottom left*_ and _*upper right*_ corners of a rectangle.
 
  * Example:
 
@@ -138,7 +138,7 @@
 
 
 ### Circle ###
-`Circle` consists of one point that represents the center of the circle and a radius of type `Double`.
+`circle` consists of one point that represents the center of the circle and a radius of type `double`.
 
  * Example:
 
@@ -153,7 +153,7 @@
 
 
 ### Polygon ###
-`Polygon` consists of _*n*_ points that represent the vertices of a _*simple closed*_ polygon.
+`polygon` consists of _*n*_ points that represent the vertices of a _*simple closed*_ polygon.
 
  * Example:
 
@@ -168,7 +168,7 @@
 
 
 ### Date ###
-`Date` represents a time point along the Gregorian calendar system specified by the year, month and day. ASTERIX supports the date from `-9999-01-01` to `9999-12-31`.
+`date` represents a time point along the Gregorian calendar system specified by the year, month and day. ASTERIX supports the date from `-9999-01-01` to `9999-12-31`.
 
 A date value can be represented in two formats, extended format and basic format.
 
@@ -188,7 +188,7 @@
 
 
 ### Time ###
-`Time` type describes the time within the range of a day. It is represented by three fields: hour, minute and second. Millisecond field is optional as the fraction of the second field. Its extended format is as `hh:mm:ss[.mmm]` and the basic format is `hhmmss[mmm]`. The value domain is from `00:00:00.000` to `23:59:59.999`.
+`time` type describes the time within the range of a day. It is represented by three fields: hour, minute and second. Millisecond field is optional as the fraction of the second field. Its extended format is as `hh:mm:ss[.mmm]` and the basic format is `hhmmss[mmm]`. The value domain is from `00:00:00.000` to `23:59:59.999`.
 
 Timezone field is optional for a time value. Timezone is represented as `[+|-]hh:mm` for extended format or `[+|-]hhmm` for basic format. Note that the sign designators cannot be omitted. `Z` can also be used to represent the UTC local time. If no timezone information is given, it is UTC by default.
 
@@ -205,11 +205,11 @@
 
 
 ### Datetime ###
-A `Datetime` value is a combination of an `Date` and `Time`, representing a fixed time point along the Gregorian calendar system. The value is among `-9999-01-01 00:00:00.000` and `9999-12-31 23:59:59.999`.
+A `datetime` value is a combination of an `date` and `time`, representing a fixed time point along the Gregorian calendar system. The value is among `-9999-01-01 00:00:00.000` and `9999-12-31 23:59:59.999`.
 
-A `Datetime` value is represented as a combination of the representation of its `Date` part and `Time` part, separated by a separator `T`. Either extended or basic format can be used, and the two parts should be the same format.
+A `datetime` value is represented as a combination of the representation of its `date` part and `time` part, separated by a separator `T`. Either extended or basic format can be used, and the two parts should be the same format.
 
-Millisecond field and timezone field are optional, as specified in the `Time` type.
+Millisecond field and timezone field are optional, as specified in the `time` type.
 
  * Example:
 
@@ -224,11 +224,11 @@
 
 
 ### Duration ###
-`Duration` represents a duration of time. A duration value is specified by integers on at least one of the following fields: year, month, day, hour, minute, second, and millisecond.
+`duration` represents a duration of time. A duration value is specified by integers on at least one of the following fields: year, month, day, hour, minute, second, and millisecond.
 
 A duration value is in the format of `[-]PnYnMnDTnHnMn.mmmS`. The millisecond part (as the fraction of the second field) is optional, and when no millisecond field is used, the decimal point should also be absent.
 
-Negative durations are also supported for the arithmetic operations between time instance types (`Date`, `Time` and `Datetime`), and is used to roll the time back for the given duration. For example `date("2012-01-01") + duration("-P3D")` will return `date("2011-12-29")`.
+Negative durations are also supported for the arithmetic operations between time instance types (`date`, `time` and `datetime`), and is used to roll the time back for the given duration. For example `date("2012-01-01") + duration("-P3D")` will return `date("2011-12-29")`.
 
 Note that a canonical representation of the duration is always returned, regardless whether the duration is in the canonical representation or not from the user's input. More information about canonical representation can be found from [XPath dayTimeDuration Canonical Representation](http://www.w3.org/TR/xpath-functions/#canonical-dayTimeDuration) and [yearMonthDuration Canonical Representation](http://www.w3.org/TR/xpath-functions/#canonical-yearMonthDuration).
 
@@ -245,7 +245,7 @@
 
 
 ### Interval ###
-`Interval` represents inclusive-exclusive ranges of time. It is defined by two time point values with the same temporal type(`Date`, `Time` or `Datetime`).
+`interval` represents inclusive-exclusive ranges of time. It is defined by two time point values with the same temporal type(`date`, `time` or `datetime`).
 
  * Example:
 
@@ -263,7 +263,7 @@
 ## Derived Types ##
 
 ### Record ###
-A `Record` contains a set of ﬁelds, where each ﬁeld is described by its name and type. A record type is either open or closed. Open records can contain ﬁelds that are not part of the type deﬁnition, while closed records cannot. Syntactically, record constructors are surrounded by curly braces "{...}".
+A `record` contains a set of ﬁelds, where each ﬁeld is described by its name and type. A record type is either open or closed. Open records can contain ﬁelds that are not part of the type deﬁnition, while closed records cannot. Syntactically, record constructors are surrounded by curly braces "{...}".
 
 An example would be
 
@@ -272,7 +272,7 @@
 
 
 ### OrderedList ###
-An `OrderedList` is a sequence of values for which the order is determined by creation or insertion. OrderedList constructors are denoted by brackets: "[...]".
+An `orderedList` is a sequence of values for which the order is determined by creation or insertion. OrderedList constructors are denoted by brackets: "[...]".
 
 An example would be
 
@@ -281,7 +281,7 @@
 
 
 ### UnorderedList ###
-An `UnorderedList` is an unordered sequence of values, similar to bags in SQL. UnorderedList constructors are denoted by two opening flower braces followed by data and two closing flower braces, like "{{...}}".
+An `unorderedList` is an unordered sequence of values, similar to bags in SQL. UnorderedList constructors are denoted by two opening flower braces followed by data and two closing flower braces, like "{{...}}".
 
 An example would be
 
diff --git a/asterix-doc/src/site/markdown/AccessingExternalDataInAsterixDB.md b/asterix-doc/src/site/markdown/aql/externaldata.md
similarity index 98%
rename from asterix-doc/src/site/markdown/AccessingExternalDataInAsterixDB.md
rename to asterix-doc/src/site/markdown/aql/externaldata.md
index 7319094..e603954 100644
--- a/asterix-doc/src/site/markdown/AccessingExternalDataInAsterixDB.md
+++ b/asterix-doc/src/site/markdown/aql/externaldata.md
@@ -10,7 +10,7 @@
 
 As an example we consider the Lineitem dataset from [TPCH schema](http://www.openlinksw.com/dataspace/doc/dav/wiki/Main/VOSTPCHLinkedData/tpch.sql).
 
-We assume that you have successfully created an ASTERIX instance following the instructions at [Installing Asterix Using Managix](InstallingAsterixUsingManagix.html).
+We assume that you have successfully created an ASTERIX instance following the instructions at [Installing Asterix Using Managix](../install.html).
 _For constructing an example, we assume a single machine setup._
 
 Similar to a regular dataset, an external dataset has an associated datatype.  We shall first create the datatype associated with each record in Lineitem data.
diff --git a/asterix-doc/src/site/markdown/AsterixDBFunctions.md b/asterix-doc/src/site/markdown/aql/functions.md
similarity index 80%
rename from asterix-doc/src/site/markdown/AsterixDBFunctions.md
rename to asterix-doc/src/site/markdown/aql/functions.md
index d47752c..1f46fca 100644
--- a/asterix-doc/src/site/markdown/AsterixDBFunctions.md
+++ b/asterix-doc/src/site/markdown/aql/functions.md
@@ -9,7 +9,7 @@
 
  * Converts the string `string_expression` to its code-based representation.
  * Arguments:
-   * `string_expression` : A `String` that will be converted.
+   * `string_expression` : A `string` that will be converted.
  * Return Value:
    * An `OrderedList` of the code points for the string `string_expression`.
 
@@ -22,7 +22,7 @@
  * Arguments:
    * `list_expression` : An `OrderedList` of code-points.
  * Return Value:
-   * A `String` representation of `list_expression`.
+   * A `string` representation of `list_expression`.
 
  * Example:
 
@@ -42,14 +42,14 @@
 ### contains ###
  * Syntax:
 
-        contains(string_expression, string_pattern)
+        contains(string_expression, substring_to_contain)
 
- * Checks whether the string `string_expression` contains the string `string_pattern`
+ * Checks whether the string `string_expression` contains the string `substring_to_contain`
  * Arguments:
-   * `string_expression` : A `String` that might contain the pattern.
-   * `string_pattern` : A target `String` that might be contained.
+   * `string_expression` : A `string` that might contain the given substring.
+   * `substring_to_contain` : A target `string` that might be contained.
  * Return Value:
-   * A `Boolean`, returns `true` if `string_expression` contains `string_pattern`, otherwise returns `false`.
+   * A `boolean`, returns `true` if `string_expression` contains `substring_to_contain`, otherwise returns `false`.
 
  * Example:
 
@@ -74,9 +74,9 @@
 
  * Returns the length of the list `list_expression`.
  * Arguments:
-   * `list_expression` : An `OrderedList`, `UnorderedList` or `NULL`, represents the list need to be checked.
+   * `list_expression` : An `OrderedList`, `UnorderedList` or `null`, represents the list need to be checked.
  * Return Value:
-   * An `Int32` that represents the length of `list_expression`.
+   * An `int32` that represents the length of `list_expression`.
 
  * Example:
 
@@ -96,12 +96,12 @@
 
         like(string_expression, string_pattern)
 
- * Checks whether the string `string_expression` contains the string `string_pattern`.
+ * Checks whether the string `string_expression` contains the string pattern `string_pattern`. Compared with `contains` function, `like` function also supports regex keywords.
  * Arguments:
-   * `string_expression` : A `String` that might contain the pattern or `NULL`.
-   * `string_pattern` : A pattern `String` that might be contained or `NULL`.
+   * `string_expression` : A `string` that might contain the pattern or `null`.
+   * `string_pattern` : A pattern `string` that might be contained or `null`.
  * Return Value:
-   * A `Boolean`, returns `true` if `string_expression` contains the pattern `string_pattern`, otherwise returns `false`.
+   * A `boolean`, returns `true` if `string_expression` contains the pattern `string_pattern`, otherwise returns `false`.
 
  * Example:
 
@@ -122,14 +122,14 @@
 ### starts-with ###
  * Syntax:
 
-        starts-with(string_expression, string_pattern)
+        starts-with(string_expression, substring_to_start_with)
 
- * Checks whether the string `string_expression` starts with the string `string_pattern`.
+ * Checks whether the string `string_expression` starts with the string `substring_to_start_with`.
  * Arguments:
-   * `string_expression` : A `String` that might start with the given string.
-   * `string_pattern` : A `String` that might be contained as the starting substring.
+   * `string_expression` : A `string` that might start with the given string.
+   * `substring_to_start_with` : A `string` that might be contained as the starting substring.
  * Return Value:
-   * A `Boolean`, returns `true` if `string_expression` starts with the string `string_pattern`, otherwise returns `false`.
+   * A `boolean`, returns `true` if `string_expression` starts with the string `substring_to_start_with`, otherwise returns `false`.
 
  * Example:
 
@@ -151,14 +151,14 @@
 ### ends-with ###
  * Syntax:
 
-        ends-with(string_expression, string_pattern)
+        ends-with(string_expression, substring_to_end_with)
 
- * Checks whether the string `string_expression` ends with the string `string_pattern`.
+ * Checks whether the string `string_expression` ends with the string `substring_to_end_with`.
  * Arguments:
-   * `string_expression` : A `String` that might end with the given string.
-   * `string_pattern` : A `String` that might be contained as the ending substring.
+   * `string_expression` : A `string` that might end with the given string.
+   * `substring_to_end_with` : A `string` that might be contained as the ending substring.
  * Return Value:
-   * A `Boolean`, returns `true` if `string_expression` ends with the string `string_pattern`, otherwise returns `false`.
+   * A `boolean`, returns `true` if `string_expression` ends with the string `substring_to_end_with`, otherwise returns `false`.
 
  * Example:
 
@@ -183,9 +183,9 @@
 
  * Concatenates a list of strings `list_expression` into a single string.
  * Arguments:
-   * `list_expression` : An `OrderedList` or `UnorderedList` of `String`s (could be `NULL`) to be concatenated.
+   * `list_expression` : An `OrderedList` or `UnorderedList` of `string`s (could be `null`) to be concatenated.
  * Return Value:
-   * Returns the concatenated `String` value.
+   * Returns the concatenated `string` value.
 
  * Example:
 
@@ -207,10 +207,10 @@
 
  * Checks whether the strings `string_expression1` and `string_expression2` are equal.
  * Arguments:
-   * `string_expression1` : A `String` to be compared.
-   * `string_expression2` : A `String` to be compared with.
+   * `string_expression1` : A `string` to be compared.
+   * `string_expression2` : A `string` to be compared with.
  * Return Value:
-   * A `Boolean`, returns `true` if `string_expression1` and `string_expression2` are equal, otherwise returns `false`.
+   * A `boolean`, returns `true` if `string_expression1` and `string_expression2` are equal, otherwise returns `false`.
 
  * Example:
 
@@ -232,8 +232,8 @@
 
  * Joins a list of strings `list_expression` with the given separator `string_expression` into a single string.
  * Arguments:
-   * `list_expression` : An `OrderedList` or `UnorderedList` of `String`s (could be NULL) to be joined.
-   * `string_expression` : A separator `String` value.
+   * `list_expression` : An `OrderedList` or `UnorderedList` of `string`s (could be `null`) to be joined.
+   * `string_expression` : A `string` as the separator.
  * Return Value:
    * Returns the joined `String`.
 
@@ -255,11 +255,11 @@
 
         lowercase(string_expression)
 
- * Returns the lowercase of a given string `string_expression`.
+ * Converts a given string `string_expression` to its lowercase form.
  * Arguments:
-   * `string_expression` : A `String` to be lowercased.
+   * `string_expression` : A `string` to be converted.
  * Return Value:
-   * Returns the lowercased `String`.
+   * Returns a `string` as the lowercase form of the given `string_expression`.
 
  * Example:
 
@@ -281,10 +281,10 @@
 
  * Checks whether the strings `string_expression` matches the given pattern `string_pattern`.
  * Arguments:
-   * `string_expression` : A `String` that might contain the pattern.
-   * `string_pattern` : A pattern `String` to be matched.
+   * `string_expression` : A `string` that might contain the pattern.
+   * `string_pattern` : A pattern `string` to be matched.
  * Return Value:
-   * A `Boolean`, returns `true` if `string_expression` matches the pattern `string_pattern`, otherwise returns `false`.
+   * A `boolean`, returns `true` if `string_expression` matches the pattern `string_pattern`, otherwise returns `false`.
 
  * Example:
 
@@ -308,11 +308,11 @@
 
  * Checks whether the strings `string_expression` matches the given pattern `string_pattern`, and replace the matched pattern `string_pattern` with the new pattern `string_replacement`.
  * Arguments:
-   * `string_expression` : A `String` that might contain the pattern.
-   * `string_pattern` : A pattern `String` to be matched.
-   * `string_replacement` : A pattern `String` to be used as the replacement.
+   * `string_expression` : A `string` that might contain the pattern.
+   * `string_pattern` : A pattern `string` to be matched.
+   * `string_replacement` : A pattern `string` to be used as the replacement.
  * Return Value:
-   * Returns a `String` that is obtained after the replacements.
+   * Returns a `string` that is obtained after the replacements.
 
  * Example:
 
@@ -335,9 +335,9 @@
 
  * Returns the length of the string `string_expression`.
  * Arguments:
-   * `string_expression` : A `String` or `NULL`, represents the string to be checked.
+   * `string_expression` : A `string` or `null`, represents the string to be checked.
  * Return Value:
-   * An `Int32` that represents the length of `string_expression`.
+   * An `int32` that represents the length of `string_expression`.
 
  * Example:
 
@@ -369,15 +369,15 @@
 ### substring ###
  * Syntax:
 
-        substring(string_expression, offset, length)
+        substring(string_expression, offset[, length])
 
- * Returns the substring from the given string `string_expression` based on the given start offset `offset`.
+ * Returns the substring from the given string `string_expression` based on the given start offset `offset` with the optional `length`.
  * Arguments:
-   * `string_expression` : A `String` as the string to be extracted.
-   * `offset` : An `Int32` as the starting offset of the substring in `string_expression`.
-   * `length` : (Optional) An `Int32` as the length of the substring.
+   * `string_expression` : A `string` as the string to be extracted.
+   * `offset` : An `int32` as the starting offset of the substring in `string_expression`.
+   * `length` : (Optional) An `int32` as the length of the substring.
  * Return Value:
-   * A `String` that represents the substring.
+   * A `string` that represents the substring.
 
  * Example:
 
@@ -400,10 +400,10 @@
 
  * Returns the substring from the given string `string_expression` before the given pattern `string_pattern`.
  * Arguments:
-   * `string_expression` : A `String` as the string to be extracted.
-   * `string_pattern` : A `String` as the string pattern to be searched.
+   * `string_expression` : A `string` as the string to be extracted.
+   * `string_pattern` : A `string` as the string pattern to be searched.
  * Return Value:
-   * A `String` that represents the substring.
+   * A `string` that represents the substring.
 
  * Example:
 
@@ -428,10 +428,10 @@
 
  * Returns the substring from the given string `string_expression` after the given pattern `string_pattern`.
  * Arguments:
-   * `string_expression` : A `String` as the string to be extracted.
-   * `string_pattern` : A `String` as the string pattern to be searched.
+   * `string_expression` : A `string` as the string to be extracted.
+   * `string_pattern` : A `string` as the string pattern to be searched.
  * Return Value:
-   * A `String` that represents the substring.
+   * A `string` that represents the substring.
 
  * Example:
 
@@ -455,12 +455,12 @@
 
         create-point(latitude, longitude)
 
- * Creates the primitive type `Point` using `latitude` and `longitude`.
+ * Creates the primitive type `point` using `latitude` and `longitude`.
  * Arguments:
-   * `latitude` : A `Double` that represents the latitude.
-   * `longitude` : A `Double` that represents the longitude.
+   * `latitude` : A `double` that represents the latitude.
+   * `longitude` : A `double` that represents the longitude.
  * Return Value:
-   * A `Point`, represents a spatial point created using the latitude and longitude provided in `latitude` and `longitude`.
+   * A `point`, represents a spatial point created using the latitude and longitude provided in `latitude` and `longitude`.
 
  * Example:
 
@@ -480,12 +480,12 @@
 
         create-line(point_expression1, point_expression2)
 
- * Creates the primitive type `Line` using `point_expression1` and `point_expression2`.
+ * Creates the primitive type `line` using `point_expression1` and `point_expression2`.
  * Arguments:
-   * `point_expression1` : A `Point` that represents the start point of the line.
-   * `point_expression2` : A `Point` that represents the end point of the line.
+   * `point_expression1` : A `point` that represents the start point of the line.
+   * `point_expression2` : A `point` that represents the end point of the line.
  * Return Value:
-   * A `Line`, represents a spatial line created using the points provided in `point_expression1` and `point_expression2`.
+   * A `line`, represents a spatial line created using the points provided in `point_expression1` and `point_expression2`.
 
  * Example:
 
@@ -505,12 +505,12 @@
 
         create-rectangle(point_expression1, point_expression2)
 
- * Creates the primitive type Rectangle using `point_expression1` and `point_expression2`.
+ * Creates the primitive type `rectangle` using `point_expression1` and `point_expression2`.
  * Arguments:
-   * `point_expression1` : A `Point` that represents the lower-left point of the rectangle.
-   * `point_expression2` : A `Point` that represents the upper-right point of the rectangle.
+   * `point_expression1` : A `point` that represents the lower-left point of the rectangle.
+   * `point_expression2` : A `point` that represents the upper-right point of the rectangle.
  * Return Value:
-   * A `Rectangle`, represents a spatial rectangle created using the points provided in `point_expression1` and `point_expression2`.
+   * A `rectangle`, represents a spatial rectangle created using the points provided in `point_expression1` and `point_expression2`.
 
  * Example:
 
@@ -530,12 +530,12 @@
 
         create-circle(point_expression, radius)
 
- * Creates the primitive type `Circle` using `point_expression` and `radius`.
+ * Creates the primitive type `circle` using `point_expression` and `radius`.
  * Arguments:
-   * `point_expression` : A `Point` that represents the center of the circle.
-   * `radius` : A `Double` that represents the radius of the circle.
+   * `point_expression` : A `point` that represents the center of the circle.
+   * `radius` : A `double` that represents the radius of the circle.
  * Return Value:
-   * A `Circle`, represents a spatial circle created using the center point and the radius provided in `point_expression` and `radius`.
+   * A `circle`, represents a spatial circle created using the center point and the radius provided in `point_expression` and `radius`.
 
  * Example:
 
@@ -553,13 +553,13 @@
 ### create-polygon ###
  * Syntax:
 
-        create-polygon(point_expression1, point_expression2, ..., point_expressionn)
+        create-polygon(point_expression1, point_expression2, point_expression3, […, point_expressionn])
 
- * Creates the primitive type `Polygon` using unlimited number of arguments `point_expression1`, `point_expression2`, ..., `point_expressionn`.
+ * Creates the primitive type `polygon` using unlimited number of arguments `point_expression1`, `point_expression2`, ..., `point_expressionn`. Note that at least three points should be specified.
  * Arguments:
-   * `point_expression1`/.../`point_expressionn` : A `Point` that represents a vertex of the polygon.
+   * `point_expression1`/.../`point_expressionn` : A `point` that represents a vertex of the polygon.
  * Return Value:
-   * A `Polygon`, represents a spatial simple polygon created using the points provided in `point_expression1`, `point_expression2`, ..., `point_expressionn`.
+   * A `polygon`, represents a spatial simple polygon created using the points provided in `point_expression1`, `point_expression2`, ..., `point_expressionn`.
 
  * Example:
 
@@ -579,11 +579,11 @@
 
         point(string_expression)
 
- * Constructor function for `Point` type by parsing a point string `string_expression`
+ * Constructor function for `point` type by parsing a point string `string_expression`
  * Arguments:
-   * `string_expression` : The `String` value representing a point value.
+   * `string_expression` : The `string` value representing a point value.
  * Return Value:
-   * A `Point` value represented by the given string.
+   * A `point` value represented by the given string.
 
  * Example:
 
@@ -604,11 +604,11 @@
 
         line(string_expression)
 
- * Constructor function for `Line` type by parsing a line string `string_expression`
+ * Constructor function for `line` type by parsing a line string `string_expression`
  * Arguments:
-   * `string_expression` : The `String` value representing a line value.
+   * `string_expression` : The `string` value representing a line value.
  * Return Value:
-   * A `Line` value represented by the given string.
+   * A `line` value represented by the given string.
 
  * Example:
 
@@ -629,11 +629,11 @@
 
         rectangle(string_expression)
 
- * Constructor function for `Rectangle` type by parsing a rectangle string `string_expression`
+ * Constructor function for `rectangle` type by parsing a rectangle string `string_expression`
  * Arguments:
-   * `string_expression` : The `String` value representing a rectangle value.
+   * `string_expression` : The `string` value representing a rectangle value.
  * Return Value:
-   * A `Rectangle` value represented by the given string.
+   * A `rectangle` value represented by the given string.
 
  * Example:
 
@@ -654,11 +654,11 @@
 
         circle(string_expression)
 
- * Constructor function for `Circle` type by parsing a circle string `string_expression`
+ * Constructor function for `circle` type by parsing a circle string `string_expression`
  * Arguments:
-   * `string_expression` : The `String` value representing a circle value.
+   * `string_expression` : The `string` value representing a circle value.
  * Return Value:
-   * A `Circle` value represented by the given string.
+   * A `circle` value represented by the given string.
 
  * Example:
 
@@ -679,11 +679,11 @@
 
         polygon(string_expression)
 
- * Constructor function for `Polygon` type by parsing a polygon string `string_expression`
+ * Constructor function for `polygon` type by parsing a polygon string `string_expression`
  * Arguments:
-   * `string_expression` : The `String` value representing a polygon value.
+   * `string_expression` : The `string` value representing a polygon value.
  * Return Value:
-   * A `Polygon` value represented by the given string.
+   * A `polygon` value represented by the given string.
 
  * Example:
 
@@ -706,9 +706,9 @@
 
  * Returns the x or y coordinates of a point `point_expression`.
  * Arguments:
-   * `point_expression` : A `Point`.
+   * `point_expression` : A `point`.
  * Return Value:
-   * A `Double`, represents the x or y coordinates of the point `point_expression`.
+   * A `double`, represents the x or y coordinates of the point `point_expression`.
 
  * Example:
 
@@ -730,7 +730,7 @@
 
  * Returns an ordered list of the points forming the spatial object `spatial_expression`.
  * Arguments:
-   * `spatial_expression` : A `Point`, `Line`, `Rectangle`, `Circle`, or `Polygon`.
+   * `spatial_expression` : A `point`, `line`, `rectangle`, `circle`, or `polygon`.
  * Return Value:
    * An `OrderedList` of the points forming the spatial object `spatial_expression`.
 
@@ -759,9 +759,9 @@
 
  * Returns the center and the radius of a circle `circle_expression`.
  * Arguments:
-   * `circle_expression` : A `Circle`.
+   * `circle_expression` : A `circle`.
  * Return Value:
-   * A `Point` or `Double`, represent the center or radius of the circle `circle_expression`.
+   * A `point` or `double`, represent the center or radius of the circle `circle_expression`.
 
  * Example:
 
@@ -785,10 +785,10 @@
 
  * Returns the euclidean distance between `point_expression1` and `point_expression2`.
  * Arguments:
-   * `point_expression1` : A `Point`.
-   * `point_expression2` : A `Point`.
+   * `point_expression1` : A `point`.
+   * `point_expression2` : A `point`.
  * Return Value:
-   * A `Double`, represents the euclidean distance between `point_expression1` and `point_expression2`.
+   * A `double`, represents the euclidean distance between `point_expression1` and `point_expression2`.
 
  * Example:
 
@@ -823,9 +823,9 @@
 
  * Returns the spatial area of `spatial_2d_expression`.
  * Arguments:
-   * `spatial_2d_expression` : A `Rectangle`, `Circle`, or `Polygon`.
+   * `spatial_2d_expression` : A `rectangle`, `circle`, or `polygon`.
  * Return Value:
-   * A `Double`, represents the area of `spatial_2d_expression`.
+   * A `double`, represents the area of `spatial_2d_expression`.
 
  * Example:
 
@@ -848,10 +848,10 @@
 
  * Checks whether `@arg1` and `@arg2` spatially intersect each other.
  * Arguments:
-   * `spatial_expression1` : A `Point`, `Line`, `Rectangle`, `Circle`, or `Polygon`.
-   * `spatial_expression2` : A `Point`, `Line`, `Rectangle`, `Circle`, or `Polygon`.
+   * `spatial_expression1` : A `point`, `line`, `rectangle`, `circle`, or `polygon`.
+   * `spatial_expression2` : A `point`, `line`, `rectangle`, `circle`, or `polygon`.
  * Return Value:
-   * A `Boolean`, represents whether `spatial_expression1` and `spatial_expression2` spatially intersect each other.
+   * A `boolean`, represents whether `spatial_expression1` and `spatial_expression2` spatially intersect each other.
 
  * Example:
 
@@ -876,12 +876,12 @@
 
  * Returns the grid cell that `point_expression1` belongs to.
  * Arguments:
-   * `point_expression1` : A `Point`, represents the point of interest that its grid cell will be returned.
-   * `point_expression2` : A `Point`, represents the origin of the grid.
-   * `x_increment` : A `Double`, represents X increments.
-   * `y_increment` : A `Double`, represents Y increments.
+   * `point_expression1` : A `point`, represents the point of interest that its grid cell will be returned.
+   * `point_expression2` : A `point`, represents the origin of the grid.
+   * `x_increment` : A `double`, represents X increments.
+   * `y_increment` : A `double`, represents Y increments.
  * Return Value:
-   * A `Rectangle`, represents the grid cell that `point_expression1` belongs to.
+   * A `rectangle`, represents the grid cell that `point_expression1` belongs to.
 
  * Example:
 
@@ -920,10 +920,10 @@
 
  * Returns the [edit distance](http://en.wikipedia.org/wiki/Levenshtein_distance) of `expression1` and `expression2`.
  * Arguments:
-   * `expression1` : A `String` or a homogeneous `OrderedList` of a comparable item type.
+   * `expression1` : A `string` or a homogeneous `OrderedList` of a comparable item type.
    * `expression2` : The same type as `expression1`.
  * Return Value:
-   * An `Int32` that represents the edit-distance similarity of `expression1` and `expression2`.
+   * An `int32` that represents the edit-distance similarity between `expression1` and `expression2`.
 
  * Example:
 
@@ -951,13 +951,13 @@
  * Checks whether `expression1` and `expression2` have a [edit distance](http://en.wikipedia.org/wiki/Levenshtein_distance) `<= threshold`.  The “check” version of edit distance is faster than the "non-check" version because the former can detect whether two items satisfy a given similarity threshold using early-termination techniques, as opposed to computing their real distance. Although possible, it is not necessary for the user to write queries using the “check” versions explicitly, since a rewrite rule can perform an appropriate transformation from a “non-check” version to a “check” version.
 
  * Arguments:
-   * `expression1` : A `String` or a homogeneous `OrderedList` of a comparable item type.
+   * `expression1` : A `string` or a homogeneous `OrderedList` of a comparable item type.
    * `expression2` : The same type as `expression1`.
-   * `threshold` : An `Int32` that represents the distance threshold.
+   * `threshold` : An `int32` that represents the distance threshold.
  * Return Value:
    * An `OrderedList` with two items:
-     * The first item contains a `Boolean` value representing whether `expression1` and `expression2` are similar.
-     * The second item contains an `Int32` that represents the edit distance of `expression1` and `expression2` if it is `<= `threshold`, or 0 otherwise.
+     * The first item contains a `boolean` value representing whether `expression1` and `expression2` are similar.
+     * The second item contains an `int32` that represents the edit distance of `expression1` and `expression2` if it is `<= `threshold`, or 0 otherwise.
 
  * Example:
 
@@ -984,7 +984,7 @@
    * `list_expression1` : An `UnorderedList` or `OrderedList`.
    * `list_expression2` : An `UnorderedList` or `OrderedList`.
  * Return Value:
-   * A `Float` that represents the Jaccard similarity of `list_expression1` and `list_expression2`.
+   * A `float` that represents the Jaccard similarity of `list_expression1` and `list_expression2`.
 
  * Example:
 
@@ -1018,11 +1018,11 @@
  * Arguments:
    * `list_expression1` : An `UnorderedList` or `OrderedList`.
    * `list_expression2` : An `UnorderedList` or `OrderedList`.
-   * `threshold` : A Float that represents the similarity threshold.
+   * `threshold` : A `float` that represents the similarity threshold.
  * Return Value:
    * An `OrderedList` with two items:
-     * The first item contains a `Boolean` value representing whether `list_expression1` and `list_expression2` are similar.
-     * The second item contains a `Float` that represents the Jaccard similarity of `list_expression1` and `list_expression2` if it is >`= `threshold`, or 0 otherwise.
+     * The first item contains a `boolean` value representing whether `list_expression1` and `list_expression2` are similar.
+     * The second item contains a `float` that represents the Jaccard similarity of `list_expression1` and `list_expression2` if it is >`= `threshold`, or 0 otherwise.
 
  * Example:
 
@@ -1043,7 +1043,7 @@
 ### Similarity Operator ~# ###
  * "`~=`" is syntactic sugar for expressing a similarity condition with a given similarity threshold.
  * The similarity function and threshold for "`~=`" are controlled via "set" directives.
- * The "`~=`" operator returns a Boolean that represents whether the operands are similar.
+ * The "`~=`" operator returns a `boolean` that represents whether the operands are similar.
 
  * Example for Jaccard similarity:
 
@@ -1097,9 +1097,9 @@
 
  * Returns a list of word tokens of `string_expression`.
  * Arguments:
-   * `string_expression` : A `String` that will be tokenized.
+   * `string_expression` : A `string` that will be tokenized.
  * Return Value:
-   * An `OrderedList` of `String` word tokens.
+   * An `OrderedList` of `string` word tokens.
 
  * Example:
 
@@ -1119,16 +1119,16 @@
         { "tweetid": "9", "word-tokens": [ "love", "verizon", "its", "voicemail", "service", "is", "awesome" ] }
 
 
-### hashed-word-tokens ###
+<!--### hashed-word-tokens ###
  * Syntax:
 
         hashed-word-tokens(string_expression)
 
  * Returns a list of hashed word tokens of `string_expression`.
  * Arguments:
-   * `string_expression` : A `String` that will be tokenized.
+   * `string_expression` : A `string` that will be tokenized.
  * Return Value:
-   * An `OrderedList` of Int32 hashed tokens.
+   * An `OrderedList` of `int32` hashed tokens.
 
  * Example:
 
@@ -1283,7 +1283,7 @@
         -790946468, -69070309, 1561601454, 26169001, -160734571, 1330043462, -486734512, -18796768, -470303314, 113421364, 1615760212, 1688217556, 1223719184, 536568131, 1682609873, 2935161,
         -414769471, -1027490137, 1602276102, 1050490461 ]
         }
-
+-->
 
 ## Temporal Functions ##
 
@@ -1292,11 +1292,11 @@
 
         date(string_expression)
 
- * Constructor function for `Date` type by parsing a date string `string_expression`
+ * Constructor function for `date` type by parsing a date string `string_expression`
  * Arguments:
-   * `string_expression` : The `String` value representing a date value.
+   * `string_expression` : The `string` value representing a date value.
  * Return Value:
-   * A `Date` value represented by the given string.
+   * A `date` value represented by the given string.
 
  * Example:
 
@@ -1319,11 +1319,11 @@
 
         time(string_expression)
 
- * Constructor function for `Time` type by parsing a time string `string_expression`
+ * Constructor function for `time` type by parsing a time string `string_expression`
  * Arguments:
-   * `string_expression` : The `String` value representing a time value.
+   * `string_expression` : The `string` value representing a time value.
  * Return Value:
-   * A `Time` value represented by the given string.
+   * A `time` value represented by the given string.
 
  * Example:
 
@@ -1346,11 +1346,11 @@
 
         datetime(string_expression)
 
- * Constructor function for `Datetime` type by parsing a datetime string `string_expression`
+ * Constructor function for `datetime` type by parsing a datetime string `string_expression`
  * Arguments:
-   * `string_expression` : The `String` value representing a datetime value.
+   * `string_expression` : The `string` value representing a datetime value.
  * Return Value:
-   * A `Datetime` value represented by the given string.
+   * A `datetime` value represented by the given string.
 
  * Example:
 
@@ -1373,12 +1373,12 @@
 
         interval-from-date(string_expression1, string_expression2)
 
- * Constructor function for `Interval` type by parsing two date strings.
+ * Constructor function for `interval` type by parsing two date strings.
  * Arguments:
-   * `string_expression1` : The `String` value representing the starting date.
-   * `string_expression2` : The `String` value representing the ending date.
+   * `string_expression1` : The `string` value representing the starting date.
+   * `string_expression2` : The `string` value representing the ending date.
  * Return Value:
-   * An `Interval` value between the two dates.
+   * An `interval` value between the two dates.
 
  * Example:
 
@@ -1395,12 +1395,12 @@
 
         interval-from-time(string_expression1, string_expression2)
 
- * Constructor function for `Interval` type by parsing two time strings.
+ * Constructor function for `interval` type by parsing two time strings.
  * Arguments:
-   * `string_expression1` : The `String` value representing the starting time.
-   * `string_expression2` : The `String` value representing the ending time.
+   * `string_expression1` : The `string` value representing the starting time.
+   * `string_expression2` : The `string` value representing the ending time.
  * Return Value:
-   * An `Interval` value between the two times.
+   * An `interval` value between the two times.
 
  * Example:
 
@@ -1417,12 +1417,12 @@
 
         interval-from-datetime(string_expression1, string_expression2)
 
- * Constructor function for `Interval` type by parsing two datetime strings.
+ * Constructor function for `interval` type by parsing two datetime strings.
  * Arguments:
-   * `string_expression1` : The `String` value representing the starting datetime.
-   * `string_expression2` : The `String` value representing the ending datetime.
+   * `string_expression1` : The `string` value representing the starting datetime.
+   * `string_expression2` : The `string` value representing the ending datetime.
  * Return Value:
-   * An `Interval` value between the two datetimes.
+   * An `interval` value between the two datetimes.
 
  * Example:
 
@@ -1441,9 +1441,9 @@
 
  * Accessors for accessing fields in a temporal value
  * Arguments:
-   * `temporal_expression` : a temporal value represented as one of the following types: `Date`, `Datetime`, `Time`, `Duration`.
+   * `temporal_expression` : a temporal value represented as one of the following types: `date`, `datetime`, `time`, `duration`.
  * Return Value:
-   * An `Int32` value representing the field to be extracted.
+   * An `int32` value representing the field to be extracted.
 
  * Example:
 
@@ -1468,10 +1468,10 @@
 
  * Create a new date by adding the duration `duration_expression` to the given date `date_expression`.
  * Arguments:
-   * `date_expression` : The `Date` value to be added onto.
-   * `duration_expression` : The `Duration` to be added.
+   * `date_expression` : The `date` value to be added onto.
+   * `duration_expression` : The `duration` to be added.
  * Return Value:
-   * A `Date` value represents the new date after being adjusted by the duration.
+   * A `date` value represents the new date after being adjusted by the duration.
 
  * Example:
 
@@ -1498,10 +1498,10 @@
 
  * Create a new datetime by adding the duration `duration_expression` to the given datetime `datetime_expression`.
  * Arguments:
-   * `datetime_expression` : The `Datetime` value to be added onto.
-   * `duration_expression` : The `Duration` to be added.
+   * `datetime_expression` : The `datetime` value to be added onto.
+   * `duration_expression` : The `duration` to be added.
  * Return Value:
-   * A `Datetime` value represents the new datetime after being adjusted by the duration.
+   * A `datetime` value represents the new datetime after being adjusted by the duration.
 
  * Example:
 
@@ -1527,10 +1527,10 @@
 
  * Create a new time by adding the duration `duration_expression` to the given time `time_expression`.
  * Arguments:
-   * `time_expression` : The `Time` value to be added onto.
-   * `duration_expression` : The `Duration` to be added.
+   * `time_expression` : The `time` value to be added onto.
+   * `duration_expression` : The `duration` to be added.
  * Return Value:
-   * A `Time` value represents the new time after being adjusted by the duration.
+   * A `time` value represents the new time after being adjusted by the duration.
 
  * Example:
 
@@ -1565,10 +1565,10 @@
 
  * Adjust the given datetime `datetime_expression` by applying the timezone information `string_expression`
  * Arguments:
-   * `datetime_expression` : A `Datetime` value to be adjusted.
-   * `string_expression` : A `String` representing the timezone information.
+   * `datetime_expression` : A `datetime` value to be adjusted.
+   * `string_expression` : A `string` representing the timezone information.
  * Return Value:
-   * A `String` value represents the new datetime after being adjusted by the timezone information.
+   * A `string` value represents the new datetime after being adjusted by the timezone information.
 
  * Example:
 
@@ -1601,10 +1601,10 @@
 
  * Adjust the given time `time_expression` by applying the timezone information `string_expression`
  * Arguments:
-   * `time_expression` : A `Time` value to be adjusted.
-   * `string_expression` : A `String` representing the timezone information.
+   * `time_expression` : A `time` value to be adjusted.
+   * `string_expression` : A `string` representing the timezone information.
  * Return Value:
-   * A `String` value represents the new time after being adjusted by the timezone information.
+   * A `string` value represents the new time after being adjusted by the timezone information.
 
  * Example:
 
@@ -1637,10 +1637,10 @@
 
  * Get a user-friendly representation of the duration `duration_expression` based on the given datetime `datetime_expression`
  * Arguments:
-   * `datetime_expression` : A `Datetime` value to be used as the reference time point.
-   * `duration_expression` : A `Duration` value to be converted
+   * `datetime_expression` : A `datetime` value to be used as the reference time point.
+   * `duration_expression` : A `duration` value to be converted
  * Return Value:
-   * A `Duration` value with the duration as `duration_expression` but with a user-friendly representation.
+   * A `duration` value with the duration as `duration_expression` but with a user-friendly representation.
 
  * Example:
 
@@ -1665,10 +1665,10 @@
 
  * Get a user-friendly representation of the duration `duration_expression` based on the given date `date_expression`
  * Arguments:
-   * `date_expression` : A `Date` value to be used as the reference time point.
-   * `duration_expression` : A `Duration` value to be converted
+   * `date_expression` : A `date` value to be used as the reference time point.
+   * `duration_expression` : A `duration` value to be converted
  * Return Value:
-   * A `Duration` value with the duration as `duration_expression` but with a user-friendly representation.
+   * A `duration` value with the duration as `duration_expression` but with a user-friendly representation.
 
  * Example:
 
@@ -1695,7 +1695,7 @@
  * Get the current date
  * Arguments:None
  * Return Value:
-   * A `Date` value of the date when the function is called.
+   * A `date` value of the date when the function is called.
 
 ### current-time ###
  * Syntax:
@@ -1705,7 +1705,7 @@
  * Get the current time
  * Arguments:None
  * Return Value:
-   * A `Time` value of the time when the function is called.
+   * A `time` value of the time when the function is called.
 
 ### current-datetime ###
  * Syntax:
@@ -1715,7 +1715,7 @@
  * Get the current datetime
  * Arguments:None
  * Return Value:
-   * A `Datetime` value of the datetime when the function is called.
+   * A `datetime` value of the datetime when the function is called.
 
  * Example:
 
@@ -1740,9 +1740,9 @@
 
  * Get the date value from the given datetime value `datetime_expression`
  * Arguments:
-   * `datetime_expression`: A `Datetime` value to be extracted from
+   * `datetime_expression`: A `datetime` value to be extracted from
  * Return Value:
-   * A `Date` value from the datetime.
+   * A `date` value from the datetime.
 
 ### time-from-datetime ###
  * Syntax:
@@ -1751,9 +1751,9 @@
 
  * Get the time value from the given datetime value `datetime_expression`
  * Arguments:
-   * `datetime_expression`: A `Datetime` value to be extracted from
+   * `datetime_expression`: A `datetime` value to be extracted from
  * Return Value:
-   * A `Time` value from the datetime.
+   * A `time` value from the datetime.
 
  * Example:
 
@@ -1778,9 +1778,9 @@
 
  * Get date representing the time after `numeric_expression` days since 1970-01-01
  * Arguments:
-   * `numeric_expression`: A `Int8`/`Int16`/`Int32` value representing the number of days
+   * `numeric_expression`: A `int8`/`int16`/`int32` value representing the number of days
  * Return Value:
-   * A `Date` value as the time after `numeric_expression` days since 1970-01-01
+   * A `date` value as the time after `numeric_expression` days since 1970-01-01
 
 ### datetime-from-unix-time-in-ms ###
  * Syntax:
@@ -1789,9 +1789,9 @@
 
  * Get datetime representing the time after `numeric_expression` milliseconds since 1970-01-01T00:00:00Z
  * Arguments:
-   * `numeric_expression`: A `Int8`/`Int16`/`Int32`/`Int64` value representing the number of milliseconds
+   * `numeric_expression`: A `int8`/`int16`/`int32`/`int64` value representing the number of milliseconds
  * Return Value:
-   * A `Datetime` value as the time after `numeric_expression` milliseconds since 1970-01-01T00:00:00Z
+   * A `datetime` value as the time after `numeric_expression` milliseconds since 1970-01-01T00:00:00Z
 
 ### time-from-unix-time-in-ms ###
  * Syntax:
@@ -1800,9 +1800,9 @@
 
  * Get time representing the time after `numeric_expression` milliseconds since 00:00:00.000Z
  * Arguments:
-   * `numeric_expression`: A `Int8`/`Int16`/`Int32` value representing the number of milliseconds
+   * `numeric_expression`: A `int8`/`int16`/`int32` value representing the number of milliseconds
  * Return Value:
-   * A `Time` value as the time after `numeric_expression` milliseconds since 00:00:00.000Z
+   * A `time` value as the time after `numeric_expression` milliseconds since 00:00:00.000Z
 
  * Example:
 
@@ -1826,10 +1826,10 @@
 
  * Get the duration between two dates `date_start` and `date_end`
  * Arguments:
-   * `date_start`: the starting `Date`
-   * `date_end`: the ending `Date`
+   * `date_start`: the starting `date`
+   * `date_end`: the ending `date`
  * Return Value:
-   * A `Duration` value between `date_start` and `date_end`
+   * A `duration` value between `date_start` and `date_end`
 
  * Example:
 
@@ -1855,10 +1855,10 @@
 
  * Get the duration between two times `time_start` and `time_end`
  * Arguments:
-   * `time_start`: the starting `Time`
-   * `time_end`: the ending `Time`
+   * `time_start`: the starting `time`
+   * `time_end`: the ending `time`
  * Return Value:
-   * A `Duration` value between `time_start` and `time_end`
+   * A `duration` value between `time_start` and `time_end`
 
  * Example:
 
@@ -1884,10 +1884,10 @@
 
  * Get the duration between two datetimes `datetime_start` and `datetime_end`
  * Arguments:
-   * `datetime_start`: the starting `Datetime`
-   * `datetime_end`: the ending `Datetime`
+   * `datetime_start`: the starting `datetime`
+   * `datetime_end`: the ending `datetime`
  * Return Value:
-   * A `Duration` value between `datetime_start` and `datetime_end`
+   * A `duration` value between `datetime_start` and `datetime_end`
 
  * Example:
 
@@ -1908,3 +1908,23 @@
         { "id1": 3, "id2": 7, "diff": duration("P28D") }
         { "id1": 7, "id2": 1, "diff": duration("P13D") }
 
+### get-interval-start, get-interval-end ###
+ * Syntax:
+
+        get-interval-start/get-interval-end(interval)
+
+ * Get the start/end of the given interval
+ * Arguments:
+   * `interval`: the interval to be accessed
+ * Return Value:
+   * A `time`, `date` or `datetime` (depending on the time instances of the interval) representing the starting or ending time.
+
+ * Example:
+
+        let $itv := interval-start-from-date("1984-01-01", "P1Y")
+        return {"start": get-interval-start($itv), "end": get-interval-end($itv)}
+
+
+ * The expected result is:
+
+        { "start": date("1984-01-01"), "end": date("1985-01-01") }
\ No newline at end of file
diff --git a/asterix-doc/src/site/markdown/AsterixQueryLanguageReference.md b/asterix-doc/src/site/markdown/aql/manual.md
similarity index 100%
rename from asterix-doc/src/site/markdown/AsterixQueryLanguageReference.md
rename to asterix-doc/src/site/markdown/aql/manual.md
diff --git a/asterix-doc/src/site/markdown/AdmAql101.md b/asterix-doc/src/site/markdown/aql/primer.md
similarity index 98%
rename from asterix-doc/src/site/markdown/AdmAql101.md
rename to asterix-doc/src/site/markdown/aql/primer.md
index ed4736e..9046527 100644
--- a/asterix-doc/src/site/markdown/AdmAql101.md
+++ b/asterix-doc/src/site/markdown/aql/primer.md
@@ -12,7 +12,7 @@
 Most importantly, it assumes you already have a running instance of AsterixDB and that you know how to query
 it using AsterixDB's basic web interface.
 For more information on these topics, you should go through the steps in 
-[Installing Asterix Using Managix](InstallingAsterixUsingManagix.html)
+[Installing Asterix Using Managix](../install.html)
 before reading this document and make sure that you have a running AsterixDB instance ready to go.
 To get your feet wet, you should probably start with a simple local installation of AsterixDB on your favorite
 machine, accepting all of the default settings that Managix offers.
@@ -211,8 +211,8 @@
 This index will be a B+ tree index; its type is unspecified and _btree_ is the default type.
 The other three illustrate how you can explicitly specify the desired type of index.
 In addition to btree, _rtree_ and inverted _keyword_ indexes are supported by AsterixDB.
-Indexes can also have composite keys, and there are more advanced flavors of text indexing
-available as well (_fuzzy keyword_ and _ngram(k)_, where _k_ is the desired gram length).
+Indexes can also have composite keys, and more advanced text indexing is available as well
+(ngram(k), where k is the desired gram length).
 
 ### Querying the Metadata Dataverse ###
 
@@ -350,7 +350,7 @@
 in the not-too-distant future we will also provide a complete reference manual for the language.
 In the meantime, this will get you started down the path of using AsterixDB.
 A more complete list of the supported AsterixDB primitive types and built-in functions can be
-found at [AsterixDataTypesAndFunctions](AsterixDataTypesAndFunctions.html).
+found at [AsterixDataTypesAndFunctions](functions.html).
 
 AQL is an expression language.
 Even the expression 1+1 is a valid AQL query that evaluates to 2.
diff --git a/asterix-doc/src/site/markdown/SimilarityQuery.md b/asterix-doc/src/site/markdown/aql/similarity.md
similarity index 83%
rename from asterix-doc/src/site/markdown/SimilarityQuery.md
rename to asterix-doc/src/site/markdown/aql/similarity.md
index 6f332ea..244103c 100644
--- a/asterix-doc/src/site/markdown/SimilarityQuery.md
+++ b/asterix-doc/src/site/markdown/aql/similarity.md
@@ -1,7 +1,7 @@
 
-# AsterixDB  Support of Similarity Queries # 
+# AsterixDB  Support of Similarity Queries #
 
-## Motivation ## 
+## Motivation ##
 
 Similarity queries are widely used in applications where users need to
 find records that satisfy a similarity predicate, while exact matching
@@ -14,12 +14,12 @@
 users who have similar friends. To meet this type of needs, AsterixDB
 supports similarity queries using efficient indexes and algorithms.
 
-## Data Types and Similarity Functions ## 
+## Data Types and Similarity Functions ##
 
 AsterixDB supports [edit distance](http://en.wikipedia.org/wiki/Levenshtein_distance) (on strings) and
 [Jaccard](http://en.wikipedia.org/wiki/Jaccard_index) (on sets).  For
 instance, in our
-[TinySocial](AdmAql101.html#ADM:_Modeling_Semistructed_Data_in_AsterixDB)
+[TinySocial](primer.html#ADM:_Modeling_Semistructed_Data_in_AsterixDB)
 example, the `friend-ids` of a Facebook user forms a set
 of friends, and we can define a similarity between the sets of
 friends of two users. We can also convert a string to a set of grams of a length "n"
@@ -29,13 +29,13 @@
 `schwarzenegger` are `sch`, `chw`, `hwa`, ..., `ger`.
 
 AsterixDB provides
-[tokenization functions](AsterixDBFunctions.html#Tokenizing_Functions)
+[tokenization functions](functions.html#Tokenizing_Functions)
 to convert strings to sets, and the
-[similarity functions](AsterixDBFunctions.html#Similarity_Functions).
+[similarity functions](functions.html#Similarity_Functions).
 
-## Similarity Selection Queries ## 
+## Similarity Selection Queries ##
 
-The following [query](AsterixDBFunctions.html#edit-distance)
+The following [query](functions.html#edit-distance)
 asks for all the Facebook users whose name is similar to
 `Suzanna Tilson`, i.e., their edit distance is at most 2.
 
@@ -47,7 +47,7 @@
         return $user
 
 
-The following [query](AsterixDBFunctions.html#similarity-jaccard)
+The following [query](functions.html#similarity-jaccard)
 asks for all the Facebook users whose set of friend ids is
 similar to `[1,5,9]`, i.e., their Jaccard similarity is at least 0.6.
 
@@ -78,10 +78,10 @@
 using `simfunction` and then specify the threshold `0.6f` using
 `simthreshold`.
 
-## Similarity Join Queries ## 
+## Similarity Join Queries ##
 
 AsterixDB supports fuzzy joins between two sets. The following
-[query](AdmAql101.html#Query_5_-_Fuzzy_Join)
+[query](primer.html#Query_5_-_Fuzzy_Join)
 finds, for each Facebook user, all Twitter users with names
 similar to their name based on the edit distance.
 
@@ -103,7 +103,7 @@
                                 }
         };
 
-## Using Indexes to Support Similarity Queries ## 
+## Using Indexes to Support Similarity Queries ##
 
 AsterixDB uses two types of indexes to support similarity queries, namely
 "ngram index" and "keyword index".
@@ -129,13 +129,13 @@
 The number "3" in "ngram(3)" is the length "n" in the grams. This
 index can be used to optimize similarity queries on this attribute
 using 
-[edit-distance](AsterixDBFunctions.html#edit-distance), 
-[edit-distance-check](AsterixDBFunctions.html#edit-distance-check), 
-[jaccard](AsterixDBFunctions.html#similarity-jaccard),
-or [jaccard-check](AsterixDBFunctions.html#similarity-jaccard-check) 
+[edit-distance](functions.html#edit-distance), 
+[edit-distance-check](functions.html#edit-distance-check), 
+[jaccard](functions.html#similarity-jaccard),
+or [jaccard-check](functions.html#similarity-jaccard-check) 
 queries on this attribute where the
 similarity is defined on sets of 3-grams.  This index can also be used
-to optimize queries with the "[contains()]((AsterixDBFunctions.html#contains))" predicate (i.e., substring
+to optimize queries with the "[contains()]((functions.html#contains))" predicate (i.e., substring
 matching) since it can be also be solved by counting on the inverted
 lists of the grams in the query string.
 
@@ -169,6 +169,6 @@
         return $c
         
 As shown above, keyword index can be used to optimize queries with token-based similarity predicates, including
-[similarity-jaccard](AsterixDBFunctions.html#similarity-jaccard) and
-[similarity-jaccard-check](AsterixDBFunctions.html#similarity-jaccard-check).
+[similarity-jaccard](functions.html#similarity-jaccard) and
+[similarity-jaccard-check](functions.html#similarity-jaccard-check).
 
diff --git a/asterix-doc/src/site/markdown/index.md b/asterix-doc/src/site/markdown/index.md
index cba2fdc..f14c1e9 100644
--- a/asterix-doc/src/site/markdown/index.md
+++ b/asterix-doc/src/site/markdown/index.md
@@ -1 +1,57 @@
-# AsterixDB
+# AsterixDB: A Big Data Management System #
+
+## What Is AsterixDB? ##
+
+Welcome to the new home of the AsterixDB Big Data Management System (BDMS).
+The AsterixDB BDMS is the result of about 3.5 years of R&D involving researchers at UC Irvine, UC Riverside, and UC San Diego.
+The AsterixDB code base now consists of roughly 250K lines of Java code that has been co-developed at UC Irvine and UC Riverside.
+
+Initiated in 2009, the NSF-sponsored ASTERIX project has been developing new technologies for ingesting, storing, managing, indexing, querying, and analyzing vast quantities of semi-structured information.
+The project has been combining ideas from three distinct areas---semi-structured data, parallel databases, and data-intensive computing (a.k.a. today's Big Data platforms)---in order to create a next-generation, open-source software platform that scales by running on large, shared-nothing commodity computing clusters.
+The ASTERIX effort has been targeting a wide range of semi-structured information, ranging from "data" use cases---where information is well-typed and highly regular---to "content" use cases---where data tends to be irregular, much of each datum may be textual, and the ultimate schema for the various data types involved may be hard to anticipate up front.
+The ASTERIX project has been addressing technical issues including highly scalable data storage and indexing,  semi-structured query processing on very large clusters, and  merging time-tested parallel database techniques with modern data-intensive computing techniques  to support performant yet declarative solutions to the problem of storing and analyzing semi-structured information effectively.
+The first fruits of this labor have been captured in the AsterixDB system that is now being released in preliminary or "Beta" release form.
+We are hoping that the arrival of AsterixDB will mark the beginning of the "BDMS era", and we hope that both the Big Data community and the database community will find the AsterixDB system to be interesting and useful for a much broader class of problems than can be addressed with any one of today's current Big Data platforms and related technologies (e.g., Hadoop, Pig, Hive, HBase, MongoDB, and so on).  One of our project mottos has been "one size fits a bunch"---at least that has been our aim.  For more information about the research effort that led to the birth of AsterixDB, please refer to our NSF project web site: [http://asterix.ics.uci.edu/](http://asterix.ics.uci.edu/).
+
+In a nutshell, AsterixDB is a full-function BDMS with a rich feature set that distinguishes it from pretty much any other Big Data platform that's out and available today.  We believe that its feature set makes it well-suited to modern needs such as web data warehousing and social data storage and analysis.  AsterixDB has:
+
+ * A semistructured NoSQL style data model (ADM) resulting from extending JSON with object database ideas
+ * An expressive and declarative query language (AQL) that supports a broad range of queries and analysis over semistructured data
+ * A parallel runtime query execution engine, Hyracks, that has been scale-tested on up to 1000+ cores and 500+ disks
+ * Partitioned LSM-based data storage and indexing to support efficient ingestion and management of semistructured data
+ * Support for query access to externally stored data (e.g., data in HDFS) as well as to data stored natively by AsterixDB
+ * A rich set of primitive data types, including spatial and temporal data in addition to integer, floating point, and textual data
+ * Secondary indexing options that include B+ trees, R trees, and inverted keyword (exact and fuzzy) index types
+ * Support for fuzzy and spatial queries as well as for more traditional parametric queries
+ * Basic transactional (concurrency and recovery) capabilities akin to those of a NoSQL store
+
+## Getting and Using AsterixDB ##
+
+You are most likely here because you are interested in getting your hands on AsterixDB---so you would like to know how to get it, how to set it up, and how to use it.
+Someday our plan is to have comprehensive documentation for AsterixDB and its data model (ADM) and query language (AQL) here on this wiki.
+For the Beta release, we've got a start; for the Beta release a month or so from now, we will hopefully have much more.
+The following is a list of the wiki pages and supporting documents that we have available today:
+
+1. [InstallingAsterixUsingManagix](install.html) :
+This is our installation guide, and it is where you should start.
+This document will tell you how to obtain, install, and manage instances of [AsterixDB](https://asterixdb.googlecode.com/files/asterix-installer-0.0.4-binary-assembly.zip), including both single-machine setup (for developers) as well as cluster installations (for deployment in its intended form).
+
+2. [AdmAql101](aql/primer.html) :
+This is a first-timers introduction to the user model of the AsterixDB BDMS, by which we mean the view of AsterixDB as seen from the perspective of an "average user" or Big Data application developer.
+The AsterixDB user model consists of its data modeling features (ADM) and its query capabilities (AQL).
+This document presents a tiny "social data warehousing" example and uses it as a backdrop for describing, by example, the key features of AsterixDB.
+By working through this document, you will learn how to define the artifacts needed to manage data in AsterixDB, how to load data into the system, how to use most of the basic features of its query language, and how to insert and delete data dynamically.
+
+3. [AsterixDataTypesAndFunctions](aql/functions.html) :
+This is a reference document that catalogs the primitive data types and built-in functions available for use in AsterixDB schemas (in ADM) and queries (in AQL).
+
+4. [AQL Reference](aql/manual.html) :
+This is the AQL language reference manual.
+
+5. [AsterixDBRestAPI](api.html) :
+Access to data in an AsterixDB instance is provided via a REST-based API.
+This is a short document that describes the REST API entry points and their URL syntax.
+
+To all who have now come this far: Thanks for your interest in AsterixDB, and for kicking its tires in its Beta form.
+In addition to getting the system and trying it out, please sign up as a member of the AsterixDB user mailing list (asterixdb-users (at) googlegroups.com) so that you can contact us easily with your questions, issues, and other feedback.
+We want AsterixDB to be a "big hit" some day, and we are anxious to see what users do with it and to learn from that feedback what we should be working on most urgently in the next phase of the project.
diff --git a/asterix-doc/src/site/markdown/InstallingAsterixUsingManagix.md b/asterix-doc/src/site/markdown/install.md
similarity index 100%
rename from asterix-doc/src/site/markdown/InstallingAsterixUsingManagix.md
rename to asterix-doc/src/site/markdown/install.md
diff --git a/asterix-doc/src/site/site.xml b/asterix-doc/src/site/site.xml
index 6724153..f24fb4e 100644
--- a/asterix-doc/src/site/site.xml
+++ b/asterix-doc/src/site/site.xml
@@ -29,16 +29,14 @@
     </links>
 
     <menu name="Documentation">
-      <item name="AsterixDB: A Big Data Management System" href="AsterixAlphaRelease.html"/>
-      <item name="Installing Asterix using Managix" href="InstallingAsterixUsingManagix.html"/>
-      <item name="AsterixDB 101: An ADM and AQL Primer" href="AdmAql101.html"/>
-      <item name="Asterix Data Model (ADM)" href="AsterixDBDataModel.html"/>
-      <item name="AsterixDB Functions" href="AsterixDBFunctions.html"/>
-      <item name="The Asterix Query Language" href="AsterixQueryLanguageReference.html"/>
-      <item name="AsterixDB Support of Similarity Queries" href="AsterixSimilarityQueries.html"/>
-      <item name="Accessing External Data in AsterixDB" href="AccessingExternalDataInAsterixDB.html"/>
-      <item name="REST API to AsterixDB" href="AsterixDBRestAPI.html"/>
-      <item name="(old AQL doc)" href="AsterixQueryLanguage.html"/>      
+      <item name="Installing Asterix using Managix" href="install.html"/>
+      <item name="AsterixDB 101: An ADM and AQL Primer" href="aql/primer.html"/>
+      <item name="Asterix Data Model (ADM)" href="aql/datamodel.html"/>
+      <item name="AsterixDB Functions" href="aql/functions.html"/>
+      <item name="The Asterix Query Language" href="aql/manual.html"/>
+      <item name="AsterixDB Support of Similarity Queries" href="aql/similarity.html"/>
+      <item name="Accessing External Data in AsterixDB" href="aql/externaldata.html"/>
+      <item name="REST API to AsterixDB" href="api.html"/>
     </menu>
 
     <menu ref="reports"/>
diff --git a/asterix-events/src/main/java/edu/uci/ics/asterix/event/management/EventExecutor.java b/asterix-events/src/main/java/edu/uci/ics/asterix/event/management/EventExecutor.java
index e702ef3..63a791b 100644
--- a/asterix-events/src/main/java/edu/uci/ics/asterix/event/management/EventExecutor.java
+++ b/asterix-events/src/main/java/edu/uci/ics/asterix/event/management/EventExecutor.java
@@ -18,7 +18,6 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.StringWriter;
-import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.List;
 
diff --git a/asterix-examples/src/main/resources/tiny-social/data/fbm.adm b/asterix-examples/src/main/resources/tiny-social/data/fbm.adm
new file mode 100644
index 0000000..58d7f08
--- /dev/null
+++ b/asterix-examples/src/main/resources/tiny-social/data/fbm.adm
@@ -0,0 +1,15 @@
+{"message-id":1,"author-id":3,"in-response-to":2,"sender-location":point("47.16,77.75"),"message":" love sprint its shortcut-menu is awesome:)"}
+{"message-id":2,"author-id":1,"in-response-to":4,"sender-location":point("41.66,80.87"),"message":" dislike iphone its touch-screen is horrible"}
+{"message-id":3,"author-id":2,"in-response-to":4,"sender-location":point("48.09,81.01"),"message":" like samsung the plan is amazing"}
+{"message-id":4,"author-id":1,"in-response-to":2,"sender-location":point("37.73,97.04"),"message":" can't stand at&t the network is horrible:("}
+{"message-id":5,"author-id":6,"in-response-to":2,"sender-location":point("34.7,90.76"),"message":" love sprint the customization is mind-blowing"}
+{"message-id":6,"author-id":2,"in-response-to":1,"sender-location":point("31.5,75.56"),"message":" like t-mobile its platform is mind-blowing"}
+{"message-id":7,"author-id":5,"in-response-to":15,"sender-location":point("32.91,85.05"),"message":" dislike sprint the speed is horrible"}
+{"message-id":8,"author-id":1,"in-response-to":11,"sender-location":point("40.33,80.87"),"message":" like verizon the 3G is awesome:)"}
+{"message-id":9,"author-id":3,"in-response-to":12,"sender-location":point("34.45,96.48"),"message":" love verizon its wireless is good"}
+{"message-id":10,"author-id":1,"in-response-to":12,"sender-location":point("42.5,70.01"),"message":" can't stand motorola the touch-screen is terrible"}
+{"message-id":11,"author-id":1,"in-response-to":1,"sender-location":point("38.97,77.49"),"message":" can't stand at&t its plan is terrible"}
+{"message-id":12,"author-id":10,"in-response-to":6,"sender-location":point("42.26,77.76"),"message":" can't stand t-mobile its voicemail-service is OMG:("}
+{"message-id":13,"author-id":10,"in-response-to":4,"sender-location":point("42.77,78.92"),"message":" dislike iphone the voice-command is bad:("}
+{"message-id":14,"author-id":9,"in-response-to":12,"sender-location":point("41.33,85.28"),"message":" love at&t its 3G is good:)"}
+{"message-id":15,"author-id":7,"in-response-to":11,"sender-location":point("44.47,67.11"),"message":" like iphone the voicemail-service is awesome"}
diff --git a/asterix-examples/src/main/resources/tiny-social/data/fbu.adm b/asterix-examples/src/main/resources/tiny-social/data/fbu.adm
new file mode 100644
index 0000000..7e99ea4
--- /dev/null
+++ b/asterix-examples/src/main/resources/tiny-social/data/fbu.adm
@@ -0,0 +1,10 @@
+{"id":1,"alias":"Margarita","name":"MargaritaStoddard","user-since":datetime("2012-08-20T10:10:00"),"friend-ids":{{2,3,6,10}},"employment":[{"organization-name":"Codetechno","start-date":date("2006-08-06")}]}
+{"id":2,"alias":"Isbel","name":"IsbelDull","user-since":datetime("2011-01-22T10:10:00"),"friend-ids":{{1,4}},"employment":[{"organization-name":"Hexviafind","start-date":date("2010-04-27")}]}
+{"id":3,"alias":"Emory","name":"EmoryUnk","user-since":datetime("2012-07-10T10:10:00"),"friend-ids":{{1,5,8,9}},"employment":[{"organization-name":"geomedia","start-date":date("2010-06-17"),"end-date":date("2010-01-26")}]}
+{"id":4,"alias":"Nicholas","name":"NicholasStroh","user-since":datetime("2010-12-27T10:10:00"),"friend-ids":{{2}},"employment":[{"organization-name":"Zamcorporation","start-date":date("2010-06-08")}]}
+{"id":5,"alias":"Von","name":"VonKemble","user-since":datetime("2010-01-05T10:10:00"),"friend-ids":{{3,6,10}},"employment":[{"organization-name":"Kongreen","start-date":date("2010-11-27")}]}
+{"id":6,"alias":"Willis","name":"WillisWynne","user-since":datetime("2005-01-17T10:10:00"),"friend-ids":{{1,3,7}},"employment":[{"organization-name":"jaydax","start-date":date("2009-05-15")}]}
+{"id":7,"alias":"Suzanna","name":"SuzannaTillson","user-since":datetime("2012-08-07T10:10:00"),"friend-ids":{{6}},"employment":[{"organization-name":"Labzatron","start-date":date("2011-04-19")}]}
+{"id":8,"alias":"Nila","name":"NilaMilliron","user-since":datetime("2008-01-01T10:10:00"),"friend-ids":{{3}},"employment":[{"organization-name":"Plexlane","start-date":date("2010-02-28")}]}
+{"id":9,"alias":"Woodrow","name":"WoodrowNehling","user-since":datetime("2005-09-20T10:10:00"),"friend-ids":{{3,10}},"employment":[{"organization-name":"Zuncan","start-date":date("2003-04-22"),"end-date":date("2009-12-13")}]}
+{"id":10,"alias":"Bram","name":"BramHatch","user-since":datetime("2010-10-16T10:10:00"),"friend-ids":{{1,5,9}},"employment":[{"organization-name":"physcane","start-date":date("2007-06-05"),"end-date":date("2011-11-05")}]}
diff --git a/asterix-examples/src/main/resources/tiny-social/data/twm.adm b/asterix-examples/src/main/resources/tiny-social/data/twm.adm
new file mode 100644
index 0000000..fa764af
--- /dev/null
+++ b/asterix-examples/src/main/resources/tiny-social/data/twm.adm
@@ -0,0 +1,12 @@
+{"tweetid":"1","user":{"screen-name":"NathanGiesen@211","lang":"en","friends_count":39339,"statuses_count":473,"name":"Nathan Giesen","followers_count":49416},"sender-location":point("47.44,80.65"),"send-time":datetime("2008-04-26T10:10:00"),"referred-topics":{{"t-mobile","customization"}},"message-text":" love t-mobile its customization is good:)"}
+{"tweetid":"2","user":{"screen-name":"ColineGeyer@63","lang":"en","friends_count":121,"statuses_count":362,"name":"Coline Geyer","followers_count":17159},"sender-location":point("32.84,67.14"),"send-time":datetime("2010-05-13T10:10:00"),"referred-topics":{{"verizon","shortcut-menu"}},"message-text":" like verizon its shortcut-menu is awesome:)"}
+{"tweetid":"3","user":{"screen-name":"NathanGiesen@211","lang":"en","friends_count":39339,"statuses_count":473,"name":"Nathan Giesen","followers_count":49416},"sender-location":point("29.72,75.8"),"send-time":datetime("2006-11-04T10:10:00"),"referred-topics":{{"motorola","speed"}},"message-text":" like motorola the speed is good:)"}
+{"tweetid":"4","user":{"screen-name":"NathanGiesen@211","lang":"en","friends_count":39339,"statuses_count":473,"name":"Nathan Giesen","followers_count":49416},"sender-location":point("39.28,70.48"),"send-time":datetime("2011-12-26T10:10:00"),"referred-topics":{{"sprint","voice-command"}},"message-text":" like sprint the voice-command is mind-blowing:)"}
+{"tweetid":"5","user":{"screen-name":"NathanGiesen@211","lang":"en","friends_count":39339,"statuses_count":473,"name":"Nathan Giesen","followers_count":49416},"sender-location":point("40.09,92.69"),"send-time":datetime("2006-08-04T10:10:00"),"referred-topics":{{"motorola","speed"}},"message-text":" can't stand motorola its speed is terrible:("}
+{"tweetid":"6","user":{"screen-name":"ColineGeyer@63","lang":"en","friends_count":121,"statuses_count":362,"name":"Coline Geyer","followers_count":17159},"sender-location":point("47.51,83.99"),"send-time":datetime("2010-05-07T10:10:00"),"referred-topics":{{"iphone","voice-clarity"}},"message-text":" like iphone the voice-clarity is good:)"}
+{"tweetid":"7","user":{"screen-name":"ChangEwing_573","lang":"en","friends_count":182,"statuses_count":394,"name":"Chang Ewing","followers_count":32136},"sender-location":point("36.21,72.6"),"send-time":datetime("2011-08-25T10:10:00"),"referred-topics":{{"samsung","platform"}},"message-text":" like samsung the platform is good"}
+{"tweetid":"8","user":{"screen-name":"NathanGiesen@211","lang":"en","friends_count":39339,"statuses_count":473,"name":"Nathan Giesen","followers_count":49416},"sender-location":point("46.05,93.34"),"send-time":datetime("2005-10-14T10:10:00"),"referred-topics":{{"t-mobile","shortcut-menu"}},"message-text":" like t-mobile the shortcut-menu is awesome:)"}
+{"tweetid":"9","user":{"screen-name":"NathanGiesen@211","lang":"en","friends_count":39339,"statuses_count":473,"name":"Nathan Giesen","followers_count":49416},"sender-location":point("36.86,74.62"),"send-time":datetime("2012-07-21T10:10:00"),"referred-topics":{{"verizon","voicemail-service"}},"message-text":" love verizon its voicemail-service is awesome"}
+{"tweetid":"10","user":{"screen-name":"ColineGeyer@63","lang":"en","friends_count":121,"statuses_count":362,"name":"Coline Geyer","followers_count":17159},"sender-location":point("29.15,76.53"),"send-time":datetime("2008-01-26T10:10:00"),"referred-topics":{{"verizon","voice-clarity"}},"message-text":" hate verizon its voice-clarity is OMG:("}
+{"tweetid":"11","user":{"screen-name":"NilaMilliron_tw","lang":"en","friends_count":445,"statuses_count":164,"name":"Nila Milliron","followers_count":22649},"sender-location":point("37.59,68.42"),"send-time":datetime("2008-03-09T10:10:00"),"referred-topics":{{"iphone","platform"}},"message-text":" can't stand iphone its platform is terrible"}
+{"tweetid":"12","user":{"screen-name":"OliJackson_512","lang":"en","friends_count":445,"statuses_count":164,"name":"Oli Jackson","followers_count":22649},"sender-location":point("24.82,94.63"),"send-time":datetime("2010-02-13T10:10:00"),"referred-topics":{{"samsung","voice-command"}},"message-text":" like samsung the voice-command is amazing:)"}
diff --git a/asterix-examples/src/main/resources/tiny-social/data/twu.adm b/asterix-examples/src/main/resources/tiny-social/data/twu.adm
new file mode 100644
index 0000000..32a1917
--- /dev/null
+++ b/asterix-examples/src/main/resources/tiny-social/data/twu.adm
@@ -0,0 +1,4 @@
+{"screen-name":"NathanGiesen@211","lang":"en","friends_count":18,"statuses_count":473,"name":"Nathan Giesen","followers_count":49416}
+{"screen-name":"ColineGeyer@63","lang":"en","friends_count":121,"statuses_count":362,"name":"Coline Geyer","followers_count":17159}
+{"screen-name":"NilaMilliron_tw","lang":"en","friends_count":445,"statuses_count":164,"name":"Nila Milliron","followers_count":22649}
+{"screen-name":"ChangEwing_573","lang":"en","friends_count":182,"statuses_count":394,"name":"Chang Ewing","followers_count":32136}
diff --git a/asterix-external-data/pom.xml b/asterix-external-data/pom.xml
index 842cd67..aff6967 100644
--- a/asterix-external-data/pom.xml
+++ b/asterix-external-data/pom.xml
@@ -131,7 +131,8 @@
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
-			<artifactId>hyracks-dataflow-hadoop</artifactId>
+			<artifactId>hyracks-hdfs-core</artifactId>
+			<version>${hyracks.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>jdom</groupId>
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/CNNFeedAdapterFactory.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/CNNFeedAdapterFactory.java
index f1f5884..8c8880a 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/CNNFeedAdapterFactory.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/CNNFeedAdapterFactory.java
@@ -23,9 +23,10 @@
  * A factory class for creating the @see {CNNFeedAdapter}.  
  */
 public class CNNFeedAdapterFactory implements ITypedDatasetAdapterFactory {
+    private static final long serialVersionUID = 1L;
 
     @Override
-    public IDatasourceAdapter createAdapter(Map<String, String> configuration) throws Exception {
+    public IDatasourceAdapter createAdapter(Map<String, Object> configuration) throws Exception {
         CNNFeedAdapter cnnFeedAdapter = new CNNFeedAdapter();
         cnnFeedAdapter.configure(configuration);
         return cnnFeedAdapter;
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/HDFSAdapterFactory.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/HDFSAdapterFactory.java
index 6fcb710..c267658 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/HDFSAdapterFactory.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/HDFSAdapterFactory.java
@@ -14,22 +14,79 @@
  */
 package edu.uci.ics.asterix.external.adapter.factory;
 
+import java.util.Arrays;
+import java.util.HashMap;
 import java.util.Map;
 
+import org.apache.hadoop.mapred.InputSplit;
+import org.apache.hadoop.mapred.JobConf;
+
 import edu.uci.ics.asterix.external.dataset.adapter.HDFSAdapter;
 import edu.uci.ics.asterix.external.dataset.adapter.IDatasourceAdapter;
 import edu.uci.ics.asterix.om.types.IAType;
+import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksAbsolutePartitionConstraint;
+import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
+import edu.uci.ics.hyracks.hdfs.dataflow.ConfFactory;
+import edu.uci.ics.hyracks.hdfs.dataflow.InputSplitsFactory;
+import edu.uci.ics.hyracks.hdfs.scheduler.Scheduler;
 
 /**
  * A factory class for creating an instance of HDFSAdapter
  */
+@SuppressWarnings("deprecation")
 public class HDFSAdapterFactory implements IGenericDatasetAdapterFactory {
+    private static final long serialVersionUID = 1L;
 
     public static final String HDFS_ADAPTER_NAME = "hdfs";
+    public static final String CLUSTER_LOCATIONS = "cluster-locations";
+    public static transient String SCHEDULER = "hdfs-scheduler";
+
+    public static final String KEY_HDFS_URL = "hdfs";
+    public static final String KEY_PATH = "path";
+    public static final String KEY_INPUT_FORMAT = "input-format";
+    public static final String INPUT_FORMAT_TEXT = "text-input-format";
+    public static final String INPUT_FORMAT_SEQUENCE = "sequence-input-format";
+
+    private transient AlgebricksPartitionConstraint clusterLocations;
+    private String[] readSchedule;
+    private boolean executed[];
+    private InputSplitsFactory inputSplitsFactory;
+    private ConfFactory confFactory;
+    private boolean setup = false;
+
+    private static final Map<String, String> formatClassNames = initInputFormatMap();
+
+    private static Map<String, String> initInputFormatMap() {
+        Map<String, String> formatClassNames = new HashMap<String, String>();
+        formatClassNames.put(INPUT_FORMAT_TEXT, "org.apache.hadoop.mapred.TextInputFormat");
+        formatClassNames.put(INPUT_FORMAT_SEQUENCE, "org.apache.hadoop.mapred.SequenceFileInputFormat");
+        return formatClassNames;
+    }
 
     @Override
-    public IDatasourceAdapter createAdapter(Map<String, String> configuration, IAType atype) throws Exception {
-        HDFSAdapter hdfsAdapter = new HDFSAdapter(atype);
+    public IDatasourceAdapter createAdapter(Map<String, Object> configuration, IAType atype) throws Exception {
+        if (!setup) {
+            /** set up the factory --serializable stuff --- this if-block should be called only once for each factory instance */
+            configureJobConf(configuration);
+            JobConf conf = configureJobConf(configuration);
+            confFactory = new ConfFactory(conf);
+
+            clusterLocations = (AlgebricksPartitionConstraint) configuration.get(CLUSTER_LOCATIONS);
+            int numPartitions = ((AlgebricksAbsolutePartitionConstraint) clusterLocations).getLocations().length;
+
+            InputSplit[] inputSplits = conf.getInputFormat().getSplits(conf, numPartitions);
+            inputSplitsFactory = new InputSplitsFactory(inputSplits);
+
+            Scheduler scheduler = (Scheduler) configuration.get(SCHEDULER);
+            readSchedule = scheduler.getLocationConstraints(inputSplits);
+            executed = new boolean[readSchedule.length];
+            Arrays.fill(executed, false);
+
+            setup = true;
+        }
+        JobConf conf = confFactory.getConf();
+        InputSplit[] inputSplits = inputSplitsFactory.getSplits();
+        HDFSAdapter hdfsAdapter = new HDFSAdapter(atype, readSchedule, executed, inputSplits, conf, clusterLocations);
         hdfsAdapter.configure(configuration);
         return hdfsAdapter;
     }
@@ -39,4 +96,15 @@
         return HDFS_ADAPTER_NAME;
     }
 
+    private JobConf configureJobConf(Map<String, Object> configuration) throws Exception {
+        JobConf conf = new JobConf();
+        conf.set("fs.default.name", ((String) configuration.get(KEY_HDFS_URL)).trim());
+        conf.set("fs.hdfs.impl", "org.apache.hadoop.hdfs.DistributedFileSystem");
+        conf.setClassLoader(HDFSAdapter.class.getClassLoader());
+        conf.set("mapred.input.dir", ((String) configuration.get(KEY_PATH)).trim());
+        conf.set("mapred.input.format.class",
+                (String) formatClassNames.get(((String) configuration.get(KEY_INPUT_FORMAT)).trim()));
+        return conf;
+    }
+
 }
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/HiveAdapterFactory.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/HiveAdapterFactory.java
index 5e28eed..ba6ade5 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/HiveAdapterFactory.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/HiveAdapterFactory.java
@@ -14,20 +14,92 @@
  */
 package edu.uci.ics.asterix.external.adapter.factory;
 
+import java.util.Arrays;
+import java.util.HashMap;
 import java.util.Map;
 
+import org.apache.hadoop.mapred.InputSplit;
+import org.apache.hadoop.mapred.JobConf;
+
+import edu.uci.ics.asterix.external.dataset.adapter.HDFSAdapter;
 import edu.uci.ics.asterix.external.dataset.adapter.HiveAdapter;
 import edu.uci.ics.asterix.external.dataset.adapter.IDatasourceAdapter;
 import edu.uci.ics.asterix.om.types.IAType;
+import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksAbsolutePartitionConstraint;
+import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
+import edu.uci.ics.hyracks.hdfs.dataflow.ConfFactory;
+import edu.uci.ics.hyracks.hdfs.dataflow.InputSplitsFactory;
+import edu.uci.ics.hyracks.hdfs.scheduler.Scheduler;
 
 /**
  * A factory class for creating an instance of HiveAdapter
  */
+@SuppressWarnings("deprecation")
 public class HiveAdapterFactory implements IGenericDatasetAdapterFactory {
+    private static final long serialVersionUID = 1L;
+
+    public static final String HDFS_ADAPTER_NAME = "hdfs";
+    public static final String CLUSTER_LOCATIONS = "cluster-locations";
+    public static transient String SCHEDULER = "hdfs-scheduler";
+
+    public static final String KEY_HDFS_URL = "hdfs";
+    public static final String KEY_PATH = "path";
+    public static final String KEY_INPUT_FORMAT = "input-format";
+    public static final String INPUT_FORMAT_TEXT = "text-input-format";
+    public static final String INPUT_FORMAT_SEQUENCE = "sequence-input-format";
+
+    public static final String KEY_FORMAT = "format";
+    public static final String KEY_PARSER_FACTORY = "parser";
+    public static final String FORMAT_DELIMITED_TEXT = "delimited-text";
+    public static final String FORMAT_ADM = "adm";
+
+    public static final String HIVE_DATABASE = "database";
+    public static final String HIVE_TABLE = "table";
+    public static final String HIVE_HOME = "hive-home";
+    public static final String HIVE_METASTORE_URI = "metastore-uri";
+    public static final String HIVE_WAREHOUSE_DIR = "warehouse-dir";
+    public static final String HIVE_METASTORE_RAWSTORE_IMPL = "rawstore-impl";
+
+    private String[] readSchedule;
+    private boolean executed[];
+    private InputSplitsFactory inputSplitsFactory;
+    private ConfFactory confFactory;
+    private transient AlgebricksPartitionConstraint clusterLocations;
+    private boolean setup = false;
+
+    private static final Map<String, String> formatClassNames = initInputFormatMap();
+
+    private static Map<String, String> initInputFormatMap() {
+        Map<String, String> formatClassNames = new HashMap<String, String>();
+        formatClassNames.put(INPUT_FORMAT_TEXT, "org.apache.hadoop.mapred.TextInputFormat");
+        formatClassNames.put(INPUT_FORMAT_SEQUENCE, "org.apache.hadoop.mapred.SequenceFileInputFormat");
+        return formatClassNames;
+    }
 
     @Override
-    public IDatasourceAdapter createAdapter(Map<String, String> configuration, IAType type) throws Exception {
-        HiveAdapter hiveAdapter = new HiveAdapter(type);
+    public IDatasourceAdapter createAdapter(Map<String, Object> configuration, IAType atype) throws Exception {
+        if (!setup) {
+            /** set up the factory --serializable stuff --- this if-block should be called only once for each factory instance */
+            configureJobConf(configuration);
+            JobConf conf = configureJobConf(configuration);
+            confFactory = new ConfFactory(conf);
+
+            clusterLocations = (AlgebricksPartitionConstraint) configuration.get(CLUSTER_LOCATIONS);
+            int numPartitions = ((AlgebricksAbsolutePartitionConstraint) clusterLocations).getLocations().length;
+
+            InputSplit[] inputSplits = conf.getInputFormat().getSplits(conf, numPartitions);
+            inputSplitsFactory = new InputSplitsFactory(inputSplits);
+
+            Scheduler scheduler = (Scheduler) configuration.get(SCHEDULER);
+            readSchedule = scheduler.getLocationConstraints(inputSplits);
+            executed = new boolean[readSchedule.length];
+            Arrays.fill(executed, false);
+
+            setup = true;
+        }
+        JobConf conf = confFactory.getConf();
+        InputSplit[] inputSplits = inputSplitsFactory.getSplits();
+        HiveAdapter hiveAdapter = new HiveAdapter(atype, readSchedule, executed, inputSplits, conf, clusterLocations);
         hiveAdapter.configure(configuration);
         return hiveAdapter;
     }
@@ -36,4 +108,37 @@
     public String getName() {
         return "hive";
     }
+
+    private JobConf configureJobConf(Map<String, Object> configuration) throws Exception {
+        JobConf conf = new JobConf();
+
+        /** configure hive */
+        String database = (String) configuration.get(HIVE_DATABASE);
+        String tablePath = null;
+        if (database == null) {
+            tablePath = configuration.get(HIVE_WAREHOUSE_DIR) + "/" + configuration.get(HIVE_TABLE);
+        } else {
+            tablePath = configuration.get(HIVE_WAREHOUSE_DIR) + "/" + tablePath + ".db" + "/"
+                    + configuration.get(HIVE_TABLE);
+        }
+        configuration.put(HDFSAdapter.KEY_PATH, tablePath);
+        if (!configuration.get(KEY_FORMAT).equals(FORMAT_DELIMITED_TEXT)) {
+            throw new IllegalArgumentException("format" + configuration.get(KEY_FORMAT) + " is not supported");
+        }
+
+        if (!(configuration.get(HDFSAdapterFactory.KEY_INPUT_FORMAT).equals(HDFSAdapterFactory.INPUT_FORMAT_TEXT) || configuration
+                .get(HDFSAdapterFactory.KEY_INPUT_FORMAT).equals(HDFSAdapterFactory.INPUT_FORMAT_SEQUENCE))) {
+            throw new IllegalArgumentException("file input format"
+                    + configuration.get(HDFSAdapterFactory.KEY_INPUT_FORMAT) + " is not supported");
+        }
+
+        /** configure hdfs */
+        conf.set("fs.default.name", ((String) configuration.get(KEY_HDFS_URL)).trim());
+        conf.set("fs.hdfs.impl", "org.apache.hadoop.hdfs.DistributedFileSystem");
+        conf.setClassLoader(HDFSAdapter.class.getClassLoader());
+        conf.set("mapred.input.dir", ((String) configuration.get(KEY_PATH)).trim());
+        conf.set("mapred.input.format.class",
+                (String) formatClassNames.get(((String) configuration.get(KEY_INPUT_FORMAT)).trim()));
+        return conf;
+    }
 }
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/IAdapterFactory.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/IAdapterFactory.java
index 45fd6cf..697c8ea 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/IAdapterFactory.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/IAdapterFactory.java
@@ -14,12 +14,14 @@
  */
 package edu.uci.ics.asterix.external.adapter.factory;
 
+import java.io.Serializable;
+
 /**
  * Base interface for IGenericDatasetAdapterFactory and ITypedDatasetAdapterFactory.
  * Acts as a marker interface indicating that the implementation provides functionality
  * for creating an adapter.
  */
-public interface IAdapterFactory {
+public interface IAdapterFactory extends Serializable {
 
     /**
      * Returns the display name corresponding to the Adapter type that is created by the factory.
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/IGenericDatasetAdapterFactory.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/IGenericDatasetAdapterFactory.java
index 093a3dd..e8d120a 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/IGenericDatasetAdapterFactory.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/IGenericDatasetAdapterFactory.java
@@ -38,6 +38,6 @@
      * @return An instance of IDatasourceAdapter.
      * @throws Exception
      */
-    public IDatasourceAdapter createAdapter(Map<String, String> configuration, IAType atype) throws Exception;
+    public IDatasourceAdapter createAdapter(Map<String, Object> configuration, IAType atype) throws Exception;
 
 }
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/ITypedDatasetAdapterFactory.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/ITypedDatasetAdapterFactory.java
index 0f9978e..84a5ca8 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/ITypedDatasetAdapterFactory.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/ITypedDatasetAdapterFactory.java
@@ -33,6 +33,6 @@
      * @return An instance of IDatasourceAdapter.
      * @throws Exception
      */
-    public IDatasourceAdapter createAdapter(Map<String, String> configuration) throws Exception;
+    public IDatasourceAdapter createAdapter(Map<String, Object> configuration) throws Exception;
 
 }
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/NCFileSystemAdapterFactory.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/NCFileSystemAdapterFactory.java
index 2040949..659fd23 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/NCFileSystemAdapterFactory.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/NCFileSystemAdapterFactory.java
@@ -26,11 +26,11 @@
  * an NC.
  */
 public class NCFileSystemAdapterFactory implements IGenericDatasetAdapterFactory {
-
+    private static final long serialVersionUID = 1L;
     public static final String NC_FILE_SYSTEM_ADAPTER_NAME = "localfs";
 
     @Override
-    public IDatasourceAdapter createAdapter(Map<String, String> configuration, IAType atype) throws Exception {
+    public IDatasourceAdapter createAdapter(Map<String, Object> configuration, IAType atype) throws Exception {
         NCFileSystemAdapter fsAdapter = new NCFileSystemAdapter(atype);
         fsAdapter.configure(configuration);
         return fsAdapter;
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/PullBasedTwitterAdapterFactory.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/PullBasedTwitterAdapterFactory.java
index bc00469..e63be17 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/PullBasedTwitterAdapterFactory.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/PullBasedTwitterAdapterFactory.java
@@ -25,11 +25,11 @@
  * via pull-based Twitter API.
  */
 public class PullBasedTwitterAdapterFactory implements ITypedDatasetAdapterFactory {
-
+    private static final long serialVersionUID = 1L;
     public static final String PULL_BASED_TWITTER_ADAPTER_NAME = "pull_twitter";
 
     @Override
-    public IDatasourceAdapter createAdapter(Map<String, String> configuration) throws Exception {
+    public IDatasourceAdapter createAdapter(Map<String, Object> configuration) throws Exception {
         PullBasedTwitterAdapter twitterAdapter = new PullBasedTwitterAdapter();
         twitterAdapter.configure(configuration);
         return twitterAdapter;
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/RSSFeedAdapterFactory.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/RSSFeedAdapterFactory.java
index bbbea38..3cd22e8 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/RSSFeedAdapterFactory.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/adapter/factory/RSSFeedAdapterFactory.java
@@ -24,11 +24,11 @@
  * RSSFeedAdapter provides the functionality of fetching an RSS based feed.
  */
 public class RSSFeedAdapterFactory implements ITypedDatasetAdapterFactory {
-
+    private static final long serialVersionUID = 1L;
     public static final String RSS_FEED_ADAPTER_NAME = "rss_feed";
 
     @Override
-    public IDatasourceAdapter createAdapter(Map<String, String> configuration) throws Exception {
+    public IDatasourceAdapter createAdapter(Map<String, Object> configuration) throws Exception {
         RSSFeedAdapter rssFeedAdapter = new RSSFeedAdapter();
         rssFeedAdapter.configure(configuration);
         return rssFeedAdapter;
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/ExternalDataScanOperatorDescriptor.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/ExternalDataScanOperatorDescriptor.java
index fb4cc99..f9f72cf 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/ExternalDataScanOperatorDescriptor.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/ExternalDataScanOperatorDescriptor.java
@@ -19,8 +19,6 @@
 import edu.uci.ics.asterix.external.adapter.factory.IGenericDatasetAdapterFactory;
 import edu.uci.ics.asterix.external.dataset.adapter.IDatasourceAdapter;
 import edu.uci.ics.asterix.om.types.IAType;
-import edu.uci.ics.hyracks.api.application.ICCApplicationContext;
-import edu.uci.ics.hyracks.api.constraints.IConstraintAcceptor;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
 import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
 import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
@@ -38,61 +36,24 @@
 
     private static final long serialVersionUID = 1L;
 
-    private final String adapterFactory;
-    private final Map<String, String> adapterConfiguration;
+    private final Map<String, Object> adapterConfiguration;
     private final IAType atype;
     private IGenericDatasetAdapterFactory datasourceAdapterFactory;
 
-    public ExternalDataScanOperatorDescriptor(JobSpecification spec, String adapter, Map<String, String> arguments,
-            IAType atype, RecordDescriptor rDesc) {
+    public ExternalDataScanOperatorDescriptor(JobSpecification spec, Map<String, Object> arguments, IAType atype,
+            RecordDescriptor rDesc, IGenericDatasetAdapterFactory dataSourceAdapterFactory) {
         super(spec, 0, 1);
         recordDescriptors[0] = rDesc;
-        this.adapterFactory = adapter;
         this.adapterConfiguration = arguments;
         this.atype = atype;
-    }
-
-    @Override
-    public void contributeSchedulingConstraints(IConstraintAcceptor constraintAcceptor, ICCApplicationContext appCtx) {
-
-        /*
-        Comment: The following code is commented out. This is because constraints are being set at compile time so that they can 
-        be propagated to upstream Asterix operators. Hyracks has to provide a way to propagate constraints to upstream operators.
-        Once it is there, we will uncomment the following code.  
-        
-        AlgebricksPartitionConstraint constraint = datasourceReadAdapter.getPartitionConstraint();
-        switch (constraint.getPartitionConstraintType()) {
-            case ABSOLUTE:
-                String[] locations = ((AlgebricksAbsolutePartitionConstraint) constraint).getLocations();
-                for (int i = 0; i < locations.length; ++i) {
-                    constraintAcceptor.addConstraint(new Constraint(new PartitionLocationExpression(this.odId, i),
-                            new ConstantExpression(locations[i])));
-                }
-                constraintAcceptor.addConstraint(new Constraint(new PartitionCountExpression(this.odId),
-                        new ConstantExpression(locations.length)));
-
-                break;
-            case COUNT:
-                constraintAcceptor.addConstraint(new Constraint(new PartitionCountExpression(this.odId),
-                        new ConstantExpression(((AlgebricksCountPartitionConstraint) constraint).getCount())));
-                break;
-            default:
-                throw new IllegalStateException(" Constraint type :" + constraint.getPartitionConstraintType()
-                        + " not supported");
-
-        }*/
-
+        this.datasourceAdapterFactory = dataSourceAdapterFactory;
     }
 
     @Override
     public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx,
             IRecordDescriptorProvider recordDescProvider, final int partition, int nPartitions)
             throws HyracksDataException {
-        try {
-            datasourceAdapterFactory = (IGenericDatasetAdapterFactory) Class.forName(adapterFactory).newInstance();
-        } catch (Exception e) {
-            throw new HyracksDataException("initialization of adapter failed", e);
-        }
+
         return new AbstractUnaryOutputSourceOperatorNodePushable() {
             @Override
             public void initialize() throws HyracksDataException {
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorDescriptor.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorDescriptor.java
index 2da4e76..f07168a 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorDescriptor.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorDescriptor.java
@@ -35,52 +35,46 @@
  * Operator responsible for ingesting data from an external source. This
  * operator uses a (configurable) adapter associated with the feed dataset.
  */
-public class FeedIntakeOperatorDescriptor extends
-		AbstractSingleActivityOperatorDescriptor {
+public class FeedIntakeOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor {
 
-	private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 1L;
 
-	private final String adapterFactoryClassName;
-	private final Map<String, String> adapterConfiguration;
-	private final IAType atype;
-	private final FeedId feedId;
+    private final String adapterFactoryClassName;
+    private final Map<String, Object> adapterConfiguration;
+    private final IAType atype;
+    private final FeedId feedId;
+    private final IAdapterFactory datasourceAdapterFactory;
 
-	private transient IAdapterFactory datasourceAdapterFactory;
+    public FeedIntakeOperatorDescriptor(JobSpecification spec, FeedId feedId, String adapter,
+            Map<String, Object> arguments, ARecordType atype, RecordDescriptor rDesc,
+            IAdapterFactory datasourceAdapterFactory) {
+        super(spec, 1, 1);
+        recordDescriptors[0] = rDesc;
+        this.adapterFactoryClassName = adapter;
+        this.adapterConfiguration = arguments;
+        this.atype = atype;
+        this.feedId = feedId;
+        this.datasourceAdapterFactory = datasourceAdapterFactory;
+    }
 
-	public FeedIntakeOperatorDescriptor(JobSpecification spec, FeedId feedId,
-			String adapter, Map<String, String> arguments, ARecordType atype,
-			RecordDescriptor rDesc) {
-		super(spec, 1, 1);
-		recordDescriptors[0] = rDesc;
-		this.adapterFactoryClassName = adapter;
-		this.adapterConfiguration = arguments;
-		this.atype = atype;
-		this.feedId = feedId;
-	}
-
-	public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
-			IRecordDescriptorProvider recordDescProvider, final int partition,
-			int nPartitions) throws HyracksDataException {
-		ITypedDatasourceAdapter adapter;
-		try {
-			datasourceAdapterFactory = (IAdapterFactory) Class.forName(
-					adapterFactoryClassName).newInstance();
-			if (datasourceAdapterFactory instanceof IGenericDatasetAdapterFactory) {
-				adapter = (ITypedDatasourceAdapter) ((IGenericDatasetAdapterFactory) datasourceAdapterFactory)
-						.createAdapter(adapterConfiguration, atype);
-			} else if (datasourceAdapterFactory instanceof ITypedDatasetAdapterFactory) {
-				adapter = (ITypedDatasourceAdapter) ((ITypedDatasetAdapterFactory) datasourceAdapterFactory)
-						.createAdapter(adapterConfiguration);
-			} else {
-				throw new IllegalStateException(
-						" Unknown adapter factory type for "
-								+ adapterFactoryClassName);
-			}
-			adapter.initialize(ctx);
-		} catch (Exception e) {
-			throw new HyracksDataException("initialization of adapter failed",
-					e);
-		}
-		return new FeedIntakeOperatorNodePushable(feedId, adapter, partition);
-	}
+    public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx,
+            IRecordDescriptorProvider recordDescProvider, final int partition, int nPartitions)
+            throws HyracksDataException {
+        ITypedDatasourceAdapter adapter;
+        try {
+            if (datasourceAdapterFactory instanceof IGenericDatasetAdapterFactory) {
+                adapter = (ITypedDatasourceAdapter) ((IGenericDatasetAdapterFactory) datasourceAdapterFactory)
+                        .createAdapter(adapterConfiguration, atype);
+            } else if (datasourceAdapterFactory instanceof ITypedDatasetAdapterFactory) {
+                adapter = (ITypedDatasourceAdapter) ((ITypedDatasetAdapterFactory) datasourceAdapterFactory)
+                        .createAdapter(adapterConfiguration);
+            } else {
+                throw new IllegalStateException(" Unknown adapter factory type for " + adapterFactoryClassName);
+            }
+            adapter.initialize(ctx);
+        } catch (Exception e) {
+            throw new HyracksDataException("initialization of adapter failed", e);
+        }
+        return new FeedIntakeOperatorNodePushable(feedId, adapter, partition);
+    }
 }
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorNodePushable.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorNodePushable.java
index d0dbb98..fd40b03 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorNodePushable.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorNodePushable.java
@@ -17,6 +17,7 @@
 import java.nio.ByteBuffer;
 import java.util.concurrent.LinkedBlockingQueue;
 
+import edu.uci.ics.asterix.common.api.AsterixThreadExecutor;
 import edu.uci.ics.asterix.external.dataset.adapter.IDatasourceAdapter;
 import edu.uci.ics.asterix.external.feed.lifecycle.AlterFeedMessage;
 import edu.uci.ics.asterix.external.feed.lifecycle.FeedId;
@@ -51,7 +52,7 @@
     public void open() throws HyracksDataException {
         if (adapter instanceof IManagedFeedAdapter) {
             feedInboxMonitor = new FeedInboxMonitor((IManagedFeedAdapter) adapter, inbox, partition);
-            feedInboxMonitor.start();
+            AsterixThreadExecutor.INSTANCE.execute(feedInboxMonitor);
             feedManager.registerFeedMsgQueue(feedId, inbox);
         }
         writer.open();
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/AbstractDatasourceAdapter.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/AbstractDatasourceAdapter.java
index 440ee8c..23e545d 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/AbstractDatasourceAdapter.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/AbstractDatasourceAdapter.java
@@ -36,7 +36,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    protected Map<String, String> configuration;
+    protected Map<String, Object> configuration;
     protected transient AlgebricksPartitionConstraint partitionConstraint;
     protected IAType atype;
     protected IHyracksTaskContext ctx;
@@ -51,15 +51,15 @@
         typeToValueParserFactMap.put(ATypeTag.STRING, UTF8StringParserFactory.INSTANCE);
     }
 
-    protected static final Map<String, String> formatToParserFactoryMap = initializeFormatParserFactoryMap();
+    protected static final Map<String, Object> formatToParserFactoryMap = initializeFormatParserFactoryMap();
 
     public static final String KEY_FORMAT = "format";
     public static final String KEY_PARSER_FACTORY = "parser";
     public static final String FORMAT_DELIMITED_TEXT = "delimited-text";
     public static final String FORMAT_ADM = "adm";
 
-    private static Map<String, String> initializeFormatParserFactoryMap() {
-        Map<String, String> map = new HashMap<String, String>();
+    private static Map<String, Object> initializeFormatParserFactoryMap() {
+        Map<String, Object> map = new HashMap<String, Object>();
         map.put(FORMAT_DELIMITED_TEXT, "edu.uci.ics.asterix.runtime.operators.file.NtDelimitedDataTupleParserFactory");
         map.put(FORMAT_ADM, "edu.uci.ics.asterix.runtime.operators.file.AdmSchemafullRecordParserFactory");
         return map;
@@ -77,7 +77,7 @@
      * @param attribute
      *            The attribute whose value needs to be obtained.
      */
-    public String getAdapterProperty(String attribute) {
+    public Object getAdapterProperty(String attribute) {
         return configuration.get(attribute);
     }
 
@@ -86,7 +86,7 @@
      * 
      * @return A Map<String,String> instance representing the adapter configuration.
      */
-    public Map<String, String> getConfiguration() {
+    public Map<String, Object> getConfiguration() {
         return configuration;
     }
 
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/CNNFeedAdapter.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/CNNFeedAdapter.java
index 3898f7e..8976f7a 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/CNNFeedAdapter.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/CNNFeedAdapter.java
@@ -70,9 +70,9 @@
     }
 
     @Override
-    public void configure(Map<String, String> arguments) throws Exception {
+    public void configure(Map<String, Object> arguments) throws Exception {
         configuration = arguments;
-        String rssURLProperty = configuration.get(KEY_RSS_URL);
+        String rssURLProperty = (String) configuration.get(KEY_RSS_URL);
         if (rssURLProperty == null) {
             throw new IllegalArgumentException("no rss url provided");
         }
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/FileSystemBasedAdapter.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/FileSystemBasedAdapter.java
index 9f8cedc..8ab252d 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/FileSystemBasedAdapter.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/FileSystemBasedAdapter.java
@@ -69,7 +69,7 @@
     public abstract void initialize(IHyracksTaskContext ctx) throws Exception;
 
     @Override
-    public abstract void configure(Map<String, String> arguments) throws Exception;
+    public abstract void configure(Map<String, Object> arguments) throws Exception;
 
     @Override
     public abstract AdapterType getAdapterType();
@@ -82,14 +82,14 @@
     }
 
     protected void configureFormat() throws Exception {
-        String parserFactoryClassname = configuration.get(KEY_PARSER_FACTORY);
+        String parserFactoryClassname = (String) configuration.get(KEY_PARSER_FACTORY);
         if (parserFactoryClassname == null) {
-            String specifiedFormat = configuration.get(KEY_FORMAT);
+            String specifiedFormat = (String) configuration.get(KEY_FORMAT);
             if (specifiedFormat == null) {
                 throw new IllegalArgumentException(" Unspecified data format");
             } else if (FORMAT_DELIMITED_TEXT.equalsIgnoreCase(specifiedFormat)) {
                 parserFactory = getDelimitedDataTupleParserFactory((ARecordType) atype);
-            } else if (FORMAT_ADM.equalsIgnoreCase(configuration.get(KEY_FORMAT))) {
+            } else if (FORMAT_ADM.equalsIgnoreCase((String)configuration.get(KEY_FORMAT))) {
                 parserFactory = getADMDataTupleParserFactory((ARecordType) atype);
             } else {
                 throw new IllegalArgumentException(" format " + configuration.get(KEY_FORMAT) + " not supported");
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/HDFSAdapter.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/HDFSAdapter.java
index 1e05b2f..02eacf5 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/HDFSAdapter.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/HDFSAdapter.java
@@ -14,18 +14,9 @@
  */
 package edu.uci.ics.asterix.external.dataset.adapter;
 
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
-import java.net.UnknownHostException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
-import java.util.Random;
-import java.util.Set;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapred.Counters.Counter;
@@ -37,14 +28,9 @@
 import org.apache.hadoop.mapred.TextInputFormat;
 
 import edu.uci.ics.asterix.om.types.IAType;
-import edu.uci.ics.asterix.om.util.AsterixRuntimeUtil;
-import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksAbsolutePartitionConstraint;
-import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksCountPartitionConstraint;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException;
 import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.dataflow.hadoop.util.InputSplitsProxy;
 
 /**
  * Provides functionality for fetching external data stored in an HDFS instance.
@@ -53,118 +39,29 @@
 public class HDFSAdapter extends FileSystemBasedAdapter {
 
     private static final long serialVersionUID = 1L;
-    private static final Logger LOGGER = Logger.getLogger(HDFSAdapter.class.getName());
 
-    public static final String KEY_HDFS_URL = "hdfs";
-    public static final String KEY_INPUT_FORMAT = "input-format";
-    public static final String INPUT_FORMAT_TEXT = "text-input-format";
-    public static final String INPUT_FORMAT_SEQUENCE = "sequence-input-format";
-
-    private Object[] inputSplits;
+    private transient String[] readSchedule;
+    private transient boolean executed[];
+    private transient InputSplit[] inputSplits;
     private transient JobConf conf;
-    private InputSplitsProxy inputSplitsProxy;
-    private static final Map<String, String> formatClassNames = initInputFormatMap();
+    private transient AlgebricksPartitionConstraint clusterLocations;
 
-    private static Map<String, String> initInputFormatMap() {
-        Map<String, String> formatClassNames = new HashMap<String, String>();
-        formatClassNames.put(INPUT_FORMAT_TEXT, "org.apache.hadoop.mapred.TextInputFormat");
-        formatClassNames.put(INPUT_FORMAT_SEQUENCE, "org.apache.hadoop.mapred.SequenceFileInputFormat");
-        return formatClassNames;
-    }
+    private transient String nodeName;
 
-    public HDFSAdapter(IAType atype) {
+    public HDFSAdapter(IAType atype, String[] readSchedule, boolean[] executed, InputSplit[] inputSplits, JobConf conf,
+            AlgebricksPartitionConstraint clusterLocations) {
         super(atype);
+        this.readSchedule = readSchedule;
+        this.executed = executed;
+        this.inputSplits = inputSplits;
+        this.conf = conf;
+        this.clusterLocations = clusterLocations;
     }
 
     @Override
-    public void configure(Map<String, String> arguments) throws Exception {
-        configuration = arguments;
+    public void configure(Map<String, Object> arguments) throws Exception {
+        this.configuration = arguments;
         configureFormat();
-        configureJobConf();
-        configureSplits();
-    }
-
-    private void configureSplits() throws IOException {
-        if (inputSplitsProxy == null) {
-            inputSplits = conf.getInputFormat().getSplits(conf, 0);
-        }
-        inputSplitsProxy = new InputSplitsProxy(conf, inputSplits);
-    }
-
-    private void configurePartitionConstraint() throws Exception {
-        List<String> locations = new ArrayList<String>();
-        Random random = new Random();
-        boolean couldConfigureLocationConstraints = false;
-        try {
-            Map<String, Set<String>> nodeControllers = AsterixRuntimeUtil.getNodeControllerMap();
-            for (Object inputSplit : inputSplits) {
-                String[] dataNodeLocations = ((InputSplit) inputSplit).getLocations();
-                if (dataNodeLocations == null || dataNodeLocations.length == 0) {
-                    throw new IllegalArgumentException("No datanode locations found: check hdfs path");
-                }
-
-                // loop over all replicas until a split location coincides
-                // with an asterix datanode location
-                for (String datanodeLocation : dataNodeLocations) {
-                    Set<String> nodeControllersAtLocation = null;
-                    try {
-                        nodeControllersAtLocation = nodeControllers.get(AsterixRuntimeUtil
-                                .getIPAddress(datanodeLocation));
-                    } catch (UnknownHostException uhe) {
-                        if (LOGGER.isLoggable(Level.WARNING)) {
-                            LOGGER.log(Level.WARNING, "Unknown host :" + datanodeLocation);
-                        }
-                        continue;
-                    }
-                    if (nodeControllersAtLocation == null || nodeControllersAtLocation.size() == 0) {
-                        if (LOGGER.isLoggable(Level.WARNING)) {
-                            LOGGER.log(Level.WARNING, "No node controller found at " + datanodeLocation
-                                    + " will look at replica location");
-                        }
-                        couldConfigureLocationConstraints = false;
-                    } else {
-                        int locationIndex = random.nextInt(nodeControllersAtLocation.size());
-                        String chosenLocation = (String) nodeControllersAtLocation.toArray()[locationIndex];
-                        locations.add(chosenLocation);
-                        if (LOGGER.isLoggable(Level.INFO)) {
-                            LOGGER.log(Level.INFO, "split : " + inputSplit + " to be processed by :" + chosenLocation);
-                        }
-                        couldConfigureLocationConstraints = true;
-                        break;
-                    }
-                }
-
-                /* none of the replica locations coincides with an Asterix
-                   node controller location.
-                */
-                if (!couldConfigureLocationConstraints) {
-                    List<String> allNodeControllers = AsterixRuntimeUtil.getAllNodeControllers();
-                    int locationIndex = random.nextInt(allNodeControllers.size());
-                    String chosenLocation = allNodeControllers.get(locationIndex);
-                    locations.add(chosenLocation);
-                    if (LOGGER.isLoggable(Level.SEVERE)) {
-                        LOGGER.log(Level.SEVERE, "No local node controller found to process split : " + inputSplit
-                                + " will be processed by a remote node controller:" + chosenLocation);
-                    }
-                }
-            }
-            partitionConstraint = new AlgebricksAbsolutePartitionConstraint(locations.toArray(new String[] {}));
-        } catch (Exception e) {
-            if (LOGGER.isLoggable(Level.SEVERE)) {
-                LOGGER.log(Level.SEVERE, "Encountered exception :" + e + " using count constraints");
-            }
-            partitionConstraint = new AlgebricksCountPartitionConstraint(inputSplits.length);
-        }
-    }
-
-    private JobConf configureJobConf() throws Exception {
-        conf = new JobConf();
-        conf.set("fs.default.name", configuration.get(KEY_HDFS_URL).trim());
-        conf.set("fs.hdfs.impl", "org.apache.hadoop.hdfs.DistributedFileSystem");
-        conf.setClassLoader(HDFSAdapter.class.getClassLoader());
-        conf.set("mapred.input.dir", configuration.get(KEY_PATH).trim());
-        conf.set("mapred.input.format.class", formatClassNames.get(configuration.get(KEY_INPUT_FORMAT).trim()));
-        return conf;
     }
 
     public AdapterType getAdapterType() {
@@ -174,7 +71,7 @@
     @Override
     public void initialize(IHyracksTaskContext ctx) throws Exception {
         this.ctx = ctx;
-        inputSplits = inputSplitsProxy.toInputSplits(conf);
+        this.nodeName = ctx.getJobletContext().getApplicationContext().getNodeId();
     }
 
     private Reporter getReporter() {
@@ -215,98 +112,124 @@
         return reporter;
     }
 
-    @SuppressWarnings("unchecked")
     @Override
     public InputStream getInputStream(int partition) throws IOException {
-        try {
-            InputStream inputStream;
-            if (conf.getInputFormat() instanceof SequenceFileInputFormat) {
-                SequenceFileInputFormat format = (SequenceFileInputFormat) conf.getInputFormat();
-                RecordReader reader = format.getRecordReader(
-                        (org.apache.hadoop.mapred.FileSplit) inputSplits[partition], conf, getReporter());
-                inputStream = new HDFSStream(reader, ctx);
-            } else {
-                try {
+
+        return new InputStream() {
+
+            private RecordReader<Object, Text> reader;
+            private Object key;
+            private Text value;
+            private boolean hasMore = false;
+            private int EOL = "\n".getBytes()[0];
+            private Text pendingValue = null;
+            private int currentSplitIndex = 0;
+
+            @SuppressWarnings("unchecked")
+            private boolean moveToNext() throws IOException {
+                for (; currentSplitIndex < inputSplits.length; currentSplitIndex++) {
+                    /**
+                     * read all the partitions scheduled to the current node
+                     */
+                    if (readSchedule[currentSplitIndex].equals(nodeName)) {
+                        /**
+                         * pick an unread split to read
+                         * synchronize among simultaneous partitions in the same machine
+                         */
+                        synchronized (executed) {
+                            if (executed[currentSplitIndex] == false) {
+                                executed[currentSplitIndex] = true;
+                            } else {
+                                continue;
+                            }
+                        }
+
+                        /**
+                         * read the split
+                         */
+                        reader = getRecordReader(currentSplitIndex);
+                        key = reader.createKey();
+                        value = (Text) reader.createValue();
+                        return true;
+                    }
+                }
+                return false;
+            }
+
+            @Override
+            public int read(byte[] buffer, int offset, int len) throws IOException {
+                if (reader == null) {
+                    if (!moveToNext()) {
+                        //nothing to read
+                        return -1;
+                    }
+                }
+
+                int numBytes = 0;
+                if (pendingValue != null) {
+                    System.arraycopy(pendingValue.getBytes(), 0, buffer, offset + numBytes, pendingValue.getLength());
+                    buffer[offset + numBytes + pendingValue.getLength()] = (byte) EOL;
+                    numBytes += pendingValue.getLength() + 1;
+                    pendingValue = null;
+                }
+
+                while (numBytes < len) {
+                    hasMore = reader.next(key, value);
+                    if (!hasMore) {
+                        while (moveToNext()) {
+                            hasMore = reader.next(key, value);
+                            if (hasMore) {
+                                //move to the next non-empty split
+                                break;
+                            }
+                        }
+                    }
+                    if (!hasMore) {
+                        return (numBytes == 0) ? -1 : numBytes;
+                    }
+                    int sizeOfNextTuple = value.getLength() + 1;
+                    if (numBytes + sizeOfNextTuple > len) {
+                        // cannot add tuple to current buffer
+                        // but the reader has moved pass the fetched tuple
+                        // we need to store this for a subsequent read call.
+                        // and return this then.
+                        pendingValue = value;
+                        break;
+                    } else {
+                        System.arraycopy(value.getBytes(), 0, buffer, offset + numBytes, value.getLength());
+                        buffer[offset + numBytes + value.getLength()] = (byte) EOL;
+                        numBytes += sizeOfNextTuple;
+                    }
+                }
+                return numBytes;
+            }
+
+            @Override
+            public int read() throws IOException {
+                throw new NotImplementedException("Use read(byte[], int, int");
+            }
+
+            private RecordReader getRecordReader(int slitIndex) throws IOException {
+                if (conf.getInputFormat() instanceof SequenceFileInputFormat) {
+                    SequenceFileInputFormat format = (SequenceFileInputFormat) conf.getInputFormat();
+                    RecordReader reader = format.getRecordReader(
+                            (org.apache.hadoop.mapred.FileSplit) inputSplits[slitIndex], conf, getReporter());
+                    return reader;
+                } else {
                     TextInputFormat format = (TextInputFormat) conf.getInputFormat();
                     RecordReader reader = format.getRecordReader(
-                            (org.apache.hadoop.mapred.FileSplit) inputSplits[partition], conf, getReporter());
-                    inputStream = new HDFSStream(reader, ctx);
-                } catch (FileNotFoundException e) {
-                    throw new HyracksDataException(e);
+                            (org.apache.hadoop.mapred.FileSplit) inputSplits[slitIndex], conf, getReporter());
+                    return reader;
                 }
             }
-            return inputStream;
-        } catch (Exception e) {
-            throw new IOException(e);
-        }
+
+        };
 
     }
 
     @Override
     public AlgebricksPartitionConstraint getPartitionConstraint() throws Exception {
-        if (partitionConstraint == null) {
-            configurePartitionConstraint();
-        }
-        return partitionConstraint;
-    }
-
-}
-
-class HDFSStream extends InputStream {
-
-    private RecordReader<Object, Text> reader;
-    private final Object key;
-    private final Text value;
-    private boolean hasMore = false;
-    private static final int EOL = "\n".getBytes()[0];
-    private Text pendingValue = null;
-
-    public HDFSStream(RecordReader<Object, Text> reader, IHyracksTaskContext ctx) throws Exception {
-        this.reader = reader;
-        key = reader.createKey();
-        try {
-            value = (Text) reader.createValue();
-        } catch (ClassCastException cce) {
-            throw new Exception("value is not of type org.apache.hadoop.io.Text"
-                    + " type not supported in sequence file format", cce);
-        }
-    }
-
-    @Override
-    public int read(byte[] buffer, int offset, int len) throws IOException {
-        int numBytes = 0;
-        if (pendingValue != null) {
-            System.arraycopy(pendingValue.getBytes(), 0, buffer, offset + numBytes, pendingValue.getLength());
-            buffer[offset + numBytes + pendingValue.getLength()] = (byte) EOL;
-            numBytes += pendingValue.getLength() + 1;
-            pendingValue = null;
-        }
-
-        while (numBytes < len) {
-            hasMore = reader.next(key, value);
-            if (!hasMore) {
-                return (numBytes == 0) ? -1 : numBytes;
-            }
-            int sizeOfNextTuple = value.getLength() + 1;
-            if (numBytes + sizeOfNextTuple > len) {
-                // cannot add tuple to current buffer
-                // but the reader has moved pass the fetched tuple
-                // we need to store this for a subsequent read call.
-                // and return this then.
-                pendingValue = value;
-                break;
-            } else {
-                System.arraycopy(value.getBytes(), 0, buffer, offset + numBytes, value.getLength());
-                buffer[offset + numBytes + value.getLength()] = (byte) EOL;
-                numBytes += sizeOfNextTuple;
-            }
-        }
-        return numBytes;
-    }
-
-    @Override
-    public int read() throws IOException {
-        throw new NotImplementedException("Use read(byte[], int, int");
+        return clusterLocations;
     }
 
 }
\ No newline at end of file
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/HiveAdapter.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/HiveAdapter.java
index 3731eba..5e48834 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/HiveAdapter.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/HiveAdapter.java
@@ -16,6 +16,9 @@
 
 import java.util.Map;
 
+import org.apache.hadoop.mapred.InputSplit;
+import org.apache.hadoop.mapred.JobConf;
+
 import edu.uci.ics.asterix.om.types.IAType;
 import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
 import edu.uci.ics.hyracks.api.comm.IFrameWriter;
@@ -24,6 +27,7 @@
 /**
  * Provides the functionality of fetching data in form of ADM records from a Hive dataset.
  */
+@SuppressWarnings("deprecation")
 public class HiveAdapter extends AbstractDatasourceAdapter {
 
     private static final long serialVersionUID = 1L;
@@ -37,8 +41,9 @@
 
     private HDFSAdapter hdfsAdapter;
 
-    public HiveAdapter(IAType atype) {
-        this.hdfsAdapter = new HDFSAdapter(atype);
+    public HiveAdapter(IAType atype, String[] readSchedule, boolean[] executed, InputSplit[] inputSplits, JobConf conf,
+            AlgebricksPartitionConstraint clusterLocations) {
+        this.hdfsAdapter = new HDFSAdapter(atype, readSchedule, executed, inputSplits, conf, clusterLocations);
         this.atype = atype;
     }
 
@@ -48,33 +53,9 @@
     }
 
     @Override
-    public void configure(Map<String, String> arguments) throws Exception {
-        configuration = arguments;
-        configureHadoopAdapter();
-    }
-
-    private void configureHadoopAdapter() throws Exception {
-        String database = configuration.get(HIVE_DATABASE);
-        String tablePath = null;
-        if (database == null) {
-            tablePath = configuration.get(HIVE_WAREHOUSE_DIR) + "/" + configuration.get(HIVE_TABLE);
-        } else {
-            tablePath = configuration.get(HIVE_WAREHOUSE_DIR) + "/" + tablePath + ".db" + "/"
-                    + configuration.get(HIVE_TABLE);
-        }
-        configuration.put(HDFSAdapter.KEY_PATH, tablePath);
-        if (!configuration.get(KEY_FORMAT).equals(FORMAT_DELIMITED_TEXT)) {
-            throw new IllegalArgumentException("format" + configuration.get(KEY_FORMAT) + " is not supported");
-        }
-
-        if (!(configuration.get(HDFSAdapter.KEY_INPUT_FORMAT).equals(HDFSAdapter.INPUT_FORMAT_TEXT) || configuration
-                .get(HDFSAdapter.KEY_INPUT_FORMAT).equals(HDFSAdapter.INPUT_FORMAT_SEQUENCE))) {
-            throw new IllegalArgumentException("file input format" + configuration.get(HDFSAdapter.KEY_INPUT_FORMAT)
-                    + " is not supported");
-        }
-
-        hdfsAdapter = new HDFSAdapter(atype);
-        hdfsAdapter.configure(configuration);
+    public void configure(Map<String, Object> arguments) throws Exception {
+        this.configuration = arguments;
+        this.hdfsAdapter.configure(arguments);
     }
 
     @Override
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/IDatasourceAdapter.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/IDatasourceAdapter.java
index b0dc32f..031f34f 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/IDatasourceAdapter.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/IDatasourceAdapter.java
@@ -70,7 +70,7 @@
      * @return String the value corresponding to the configuration parameter
      *         represented by the key- attributeKey.
      */
-    public String getAdapterProperty(String propertyKey);
+    public Object getAdapterProperty(String propertyKey);
 
     /**
      * Configures the IDatasourceAdapter instance.
@@ -100,7 +100,7 @@
      *            providing all arguments as a set of (key,value) pairs. These
      *            arguments are put into the metadata.
      */
-    public void configure(Map<String, String> arguments) throws Exception;
+    public void configure(Map<String, Object> arguments) throws Exception;
 
     /**
      * Returns a list of partition constraints. A partition constraint can be a
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/NCFileSystemAdapter.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/NCFileSystemAdapter.java
index ef39d45..9abc92a 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/NCFileSystemAdapter.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/NCFileSystemAdapter.java
@@ -44,9 +44,9 @@
     }
 
     @Override
-    public void configure(Map<String, String> arguments) throws Exception {
+    public void configure(Map<String, Object> arguments) throws Exception {
         this.configuration = arguments;
-        String[] splits = arguments.get(KEY_PATH).split(",");
+        String[] splits = ((String) arguments.get(KEY_PATH)).split(",");
         configureFileSplits(splits);
         configureFormat();
     }
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/PullBasedTwitterAdapter.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/PullBasedTwitterAdapter.java
index ebfbcad..66d9f98 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/PullBasedTwitterAdapter.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/PullBasedTwitterAdapter.java
@@ -31,9 +31,8 @@
  */
 public class PullBasedTwitterAdapter extends PullBasedAdapter implements IManagedFeedAdapter {
 
-   
     private static final long serialVersionUID = 1L;
-    
+
     public static final String QUERY = "query";
     public static final String INTERVAL = "interval";
 
@@ -49,7 +48,7 @@
     }
 
     @Override
-    public void configure(Map<String, String> arguments) throws Exception {
+    public void configure(Map<String, Object> arguments) throws Exception {
         configuration = arguments;
         String[] fieldNames = { "id", "username", "location", "text", "timestamp" };
         IAType[] fieldTypes = { BuiltinType.ASTRING, BuiltinType.ASTRING, BuiltinType.ASTRING, BuiltinType.ASTRING,
@@ -69,12 +68,12 @@
     }
 
     @Override
-    public void stop()  {
+    public void stop() {
         tweetClient.stop();
     }
 
     @Override
-    public void alter(Map<String, String> properties)  {
+    public void alter(Map<String, String> properties) {
         alterRequested = true;
         this.alteredParams = properties;
     }
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/PullBasedTwitterFeedClient.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/PullBasedTwitterFeedClient.java
index 2a07472..06cddfd 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/PullBasedTwitterFeedClient.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/PullBasedTwitterFeedClient.java
@@ -63,8 +63,8 @@
         tupleFieldValues = new String[recordType.getFieldNames().length];
     }
 
-    public void initialize(Map<String, String> params) {
-        this.keywords = params.get(PullBasedTwitterAdapter.QUERY);
+    public void initialize(Map<String, Object> params) {
+        this.keywords = (String) params.get(PullBasedTwitterAdapter.QUERY);
         this.query = new Query(keywords);
         query.setRpp(100);
     }
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/RSSFeedAdapter.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/RSSFeedAdapter.java
index 611183c..ccd6516 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/RSSFeedAdapter.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/RSSFeedAdapter.java
@@ -72,9 +72,9 @@
     }
 
     @Override
-    public void configure(Map<String, String> arguments) throws Exception {
+    public void configure(Map<String, Object> arguments) throws Exception {
         configuration = arguments;
-        String rssURLProperty = configuration.get(KEY_RSS_URL);
+        String rssURLProperty = (String) configuration.get(KEY_RSS_URL);
         if (rssURLProperty == null) {
             throw new IllegalArgumentException("no rss url provided");
         }
@@ -94,7 +94,7 @@
     }
 
     protected void reconfigure(Map<String, String> arguments) {
-        String rssURLProperty = configuration.get(KEY_RSS_URL);
+        String rssURLProperty = (String) configuration.get(KEY_RSS_URL);
         if (rssURLProperty != null) {
             initializeFeedURLs(rssURLProperty);
         }
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/AlterCommand.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/AlterCommand.java
index 814f3c9..32918a7 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/AlterCommand.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/AlterCommand.java
@@ -30,7 +30,7 @@
 
     @Override
     protected void execCommand() throws Exception {
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(true);
         String instanceName = ((AlterConfig) config).name;
         InstallerUtil.validateAsterixInstanceExists(instanceName, State.INACTIVE);
         ILookupService lookupService = ServiceProvider.INSTANCE.getLookupService();
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/BackupCommand.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/BackupCommand.java
index 261de22..a0014f6 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/BackupCommand.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/BackupCommand.java
@@ -35,7 +35,7 @@
 
     @Override
     protected void execCommand() throws Exception {
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(true);
         String asterixInstanceName = ((BackupConfig) config).name;
         AsterixInstance instance = InstallerUtil.validateAsterixInstanceExists(asterixInstanceName, State.INACTIVE);
         List<BackupInfo> backupInfo = instance.getBackupInfo();
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/CreateCommand.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/CreateCommand.java
index 01a409e..a99b530 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/CreateCommand.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/CreateCommand.java
@@ -39,7 +39,7 @@
 
     @Override
     protected void execCommand() throws Exception {
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(true);
         ValidateCommand validateCommand = new ValidateCommand();
         boolean valid = validateCommand.validateCluster(((CreateConfig) config).clusterPath);
         if (!valid) {
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/DeleteCommand.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/DeleteCommand.java
index 2279d8f..4c2bb09 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/DeleteCommand.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/DeleteCommand.java
@@ -28,7 +28,7 @@
 
     @Override
     protected void execCommand() throws Exception {
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(true);
         String asterixInstanceName = ((DeleteConfig) config).name;
         AsterixInstance instance = InstallerUtil.validateAsterixInstanceExists(asterixInstanceName, State.INACTIVE);
         PatternCreator pc = new PatternCreator();
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/DescribeCommand.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/DescribeCommand.java
index 9306a56..66c6e77 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/DescribeCommand.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/DescribeCommand.java
@@ -31,7 +31,7 @@
 
     @Override
     protected void execCommand() throws Exception {
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(true);
         String asterixInstanceName = ((DescribeConfig) config).name;
         boolean adminView = ((DescribeConfig) config).admin;
         if (asterixInstanceName != null) {
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/RestoreCommand.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/RestoreCommand.java
index 9ef925a..d4d9de3 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/RestoreCommand.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/RestoreCommand.java
@@ -30,7 +30,7 @@
 
     @Override
     protected void execCommand() throws Exception {
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(true);
         String asterixInstanceName = ((RestoreConfig) config).name;
         AsterixInstance instance = InstallerUtil.validateAsterixInstanceExists(asterixInstanceName, State.INACTIVE);
         int backupId = ((RestoreConfig) config).backupId;
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/ShutdownCommand.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/ShutdownCommand.java
index b9dd23d..f38184d 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/ShutdownCommand.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/ShutdownCommand.java
@@ -22,7 +22,7 @@
 
     @Override
     protected void execCommand() throws Exception {
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(false);
         ILookupService lookupService = ServiceProvider.INSTANCE.getLookupService();
         lookupService.stopService(InstallerDriver.getConfiguration());
     }
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/StartCommand.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/StartCommand.java
index 1180a4e..9d3cb64 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/StartCommand.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/StartCommand.java
@@ -33,7 +33,7 @@
 
     @Override
     protected void execCommand() throws Exception {
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(true);
         String asterixInstanceName = ((StartConfig) config).name;
         AsterixInstance instance = InstallerUtil.validateAsterixInstanceExists(asterixInstanceName, State.INACTIVE);
         InstallerUtil.createAsterixZip(instance);
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/StopCommand.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/StopCommand.java
index dfd8c5e..f78cfbc 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/StopCommand.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/command/StopCommand.java
@@ -35,7 +35,7 @@
 
     @Override
     protected void execCommand() throws Exception {
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(true);
         String asterixInstanceName = ((StopConfig) config).name;
         AsterixInstance asterixInstance = InstallerUtil.validateAsterixInstanceExists(asterixInstanceName,
                 State.ACTIVE, State.UNUSABLE);
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/driver/InstallerDriver.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/driver/InstallerDriver.java
index 08249ee..a9ab53b 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/driver/InstallerDriver.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/driver/InstallerDriver.java
@@ -55,7 +55,7 @@
         return conf;
     }
 
-    public static void initConfig() throws Exception {
+    public static void initConfig(boolean ensureLookupServiceIsRunning) throws Exception {
         File configFile = new File(managixHome + File.separator + MANAGIX_CONF_XML);
         JAXBContext configCtx = JAXBContext.newInstance(Configuration.class);
         Unmarshaller unmarshaller = configCtx.createUnmarshaller();
@@ -63,7 +63,7 @@
         asterixZip = initBinary("asterix-server");
 
         ILookupService lookupService = ServiceProvider.INSTANCE.getLookupService();
-        if (!lookupService.isRunning(conf)) {
+        if (ensureLookupServiceIsRunning && !lookupService.isRunning(conf)) {
             lookupService.startService(conf);
         }
     }
diff --git a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/driver/InstallerUtil.java b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/driver/InstallerUtil.java
index 2b884ef..abf0420 100644
--- a/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/driver/InstallerUtil.java
+++ b/asterix-installer/src/main/java/edu/uci/ics/asterix/installer/driver/InstallerUtil.java
@@ -49,6 +49,7 @@
 
 import edu.uci.ics.asterix.common.configuration.AsterixConfiguration;
 import edu.uci.ics.asterix.common.configuration.Store;
+import edu.uci.ics.asterix.common.configuration.Coredump;
 import edu.uci.ics.asterix.event.driver.EventDriver;
 import edu.uci.ics.asterix.event.management.EventrixClient;
 import edu.uci.ics.asterix.event.management.EventUtil;
@@ -223,6 +224,14 @@
         }
         configuration.setStore(stores);
 
+        List<Coredump> coredump = new ArrayList<Coredump>();
+        String coredumpDir = null;
+        for (Node node : cluster.getNode()) {
+            coredumpDir = node.getLogDir() == null ? cluster.getLogDir() : node.getLogDir();
+            coredump.add(new Coredump(asterixInstanceName + "_" + node.getId(), coredumpDir));
+        }
+        configuration.setCoredump(coredump);
+
         File asterixConfDir = new File(InstallerDriver.getAsterixDir() + File.separator + asterixInstanceName);
         asterixConfDir.mkdirs();
 
diff --git a/asterix-installer/src/test/java/edu/uci/ics/asterix/installer/test/AsterixInstallerIntegrationUtil.java b/asterix-installer/src/test/java/edu/uci/ics/asterix/installer/test/AsterixInstallerIntegrationUtil.java
index dc6f643..c7beb28 100644
--- a/asterix-installer/src/test/java/edu/uci/ics/asterix/installer/test/AsterixInstallerIntegrationUtil.java
+++ b/asterix-installer/src/test/java/edu/uci/ics/asterix/installer/test/AsterixInstallerIntegrationUtil.java
@@ -87,7 +87,7 @@
         cmdHandler.processCommand(command.split(" "));
 
         startZookeeper();
-        InstallerDriver.initConfig();
+        InstallerDriver.initConfig(true);
         createInstance();
         hcc = new HyracksConnection(CC_IP_ADDRESS, DEFAULT_HYRACKS_CC_CLIENT_PORT);
     }
diff --git a/asterix-installer/src/test/java/edu/uci/ics/asterix/installer/test/AsterixLifecycleIT.java b/asterix-installer/src/test/java/edu/uci/ics/asterix/installer/test/AsterixLifecycleIT.java
index 98c6bf0..de73c08 100644
--- a/asterix-installer/src/test/java/edu/uci/ics/asterix/installer/test/AsterixLifecycleIT.java
+++ b/asterix-installer/src/test/java/edu/uci/ics/asterix/installer/test/AsterixLifecycleIT.java
@@ -34,11 +34,18 @@
         AsterixInstallerIntegrationUtil.init();
         TestCaseContext.Builder b = new TestCaseContext.Builder();
         testCaseCollection = b.build(new File(PATH_BASE));
+        File outdir = new File(PATH_ACTUAL);
+        outdir.mkdirs();
     }
 
     @AfterClass
     public static void tearDown() throws Exception {
         AsterixInstallerIntegrationUtil.deinit();
+        File outdir = new File(PATH_ACTUAL);
+        File[] files = outdir.listFiles();
+        if (files == null || files.length == 0) {
+            outdir.delete();
+        }
     }
 
     @Parameters
diff --git a/asterix-maven-plugins/lexer-generator-maven-plugin/pom.xml b/asterix-maven-plugins/lexer-generator-maven-plugin/pom.xml
index 6b444e8..6be403e 100644
--- a/asterix-maven-plugins/lexer-generator-maven-plugin/pom.xml
+++ b/asterix-maven-plugins/lexer-generator-maven-plugin/pom.xml
@@ -18,8 +18,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>2.0.2</version>
         <configuration>
-          <source>1.6</source>
-          <target>1.6</target>
+          <source>1.7</source>
+          <target>1.7</target>
 	  <fork>true</fork>
         </configuration>
       </plugin>
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataManager.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataManager.java
index f9f5260..c33d130 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataManager.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataManager.java
@@ -43,38 +43,29 @@
  * received from the metadata node, to avoid contacting the metadata node
  * repeatedly. We assume that this metadata manager is the only metadata manager
  * in an Asterix cluster. Therefore, no separate cache-invalidation mechanism is
- * needed at this point.
- * Assumptions/Limitations:
- * The metadata subsystem is started during NC Bootstrap start, i.e., when
- * Asterix is deployed.
- * The metadata subsystem is destroyed in NC Bootstrap end, i.e., when Asterix
- * is undeployed.
- * The metadata subsystem consists of the MetadataManager and the MatadataNode.
- * The MetadataManager provides users access to the metadata.
- * The MetadataNode implements direct access to the storage layer on behalf of
- * the MetadataManager, and translates the binary representation of ADM into
- * Java objects for consumption by the MetadataManager's users.
- * There is exactly one instance of the MetadataManager and of the MetadataNode
- * in the cluster, which may or may not be co-located on the same machine (or in
- * the same JVM).
- * The MetadataManager exists in the same JVM as its user's (e.g., the query
- * compiler).
- * The MetadataNode exists in the same JVM as it's transactional components
- * (LockManager, LogManager, etc.)
- * Users shall access the metadata only through the MetadataManager, and never
- * via the MetadataNode directly.
+ * needed at this point. Assumptions/Limitations: The metadata subsystem is
+ * started during NC Bootstrap start, i.e., when Asterix is deployed. The
+ * metadata subsystem is destroyed in NC Bootstrap end, i.e., when Asterix is
+ * undeployed. The metadata subsystem consists of the MetadataManager and the
+ * MatadataNode. The MetadataManager provides users access to the metadata. The
+ * MetadataNode implements direct access to the storage layer on behalf of the
+ * MetadataManager, and translates the binary representation of ADM into Java
+ * objects for consumption by the MetadataManager's users. There is exactly one
+ * instance of the MetadataManager and of the MetadataNode in the cluster, which
+ * may or may not be co-located on the same machine (or in the same JVM). The
+ * MetadataManager exists in the same JVM as its user's (e.g., the query
+ * compiler). The MetadataNode exists in the same JVM as it's transactional
+ * components (LockManager, LogManager, etc.) Users shall access the metadata
+ * only through the MetadataManager, and never via the MetadataNode directly.
  * Multiple threads may issue requests to the MetadataManager concurrently. For
  * the sake of accessing metadata, we assume a transaction consists of one
- * thread.
- * Users are responsible for locking the metadata (using the MetadataManager
- * API) before issuing requests.
- * The MetadataNode is responsible for acquiring finer-grained locks on behalf
- * of requests from the MetadataManager. Currently, locks are acquired per
- * BTree, since the BTree does not acquire even finer-grained locks yet
- * internally.
- * The metadata can be queried with AQL DML like any other dataset, but can only
- * be changed with AQL DDL.
- * The transaction ids for metadata transactions must be unique across the
+ * thread. Users are responsible for locking the metadata (using the
+ * MetadataManager API) before issuing requests. The MetadataNode is responsible
+ * for acquiring finer-grained locks on behalf of requests from the
+ * MetadataManager. Currently, locks are acquired per BTree, since the BTree
+ * does not acquire even finer-grained locks yet internally. The metadata can be
+ * queried with AQL DML like any other dataset, but can only be changed with AQL
+ * DDL. The transaction ids for metadata transactions must be unique across the
  * cluster, i.e., metadata transaction ids shall never "accidentally" overlap
  * with transaction ids of regular jobs or other metadata transactions.
  */
@@ -220,7 +211,7 @@
 
     @Override
     public void addDataset(MetadataTransactionContext ctx, Dataset dataset) throws MetadataException {
-        // add dataset into metadataNode 
+        // add dataset into metadataNode
         try {
             metadataNode.addDataset(ctx.getJobId(), dataset);
         } catch (RemoteException e) {
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataNode.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataNode.java
index 5aca7c4..4daf8b5 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataNode.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataNode.java
@@ -265,7 +265,7 @@
         ILSMIndex lsmIndex = (ILSMIndex) indexLifecycleManager.getIndex(resourceID);
         indexLifecycleManager.open(resourceID);
 
-        //prepare a Callback for logging
+        // prepare a Callback for logging
         IModificationOperationCallback modCallback = createIndexModificationCallback(jobId, resourceID, metadataIndex,
                 lsmIndex, IndexOperation.INSERT);
 
@@ -376,7 +376,8 @@
                         searchKey);
                 deleteTupleFromIndex(jobId, MetadataPrimaryIndexes.DATASET_DATASET, datasetTuple);
             } catch (TreeIndexException tie) {
-                //ignore this exception and continue deleting all relevant artifacts. 
+                // ignore this exception and continue deleting all relevant
+                // artifacts.
             }
 
             // Delete entry from secondary index 'group'.
@@ -390,7 +391,8 @@
                             MetadataSecondaryIndexes.GROUPNAME_ON_DATASET_INDEX, groupNameSearchKey);
                     deleteTupleFromIndex(jobId, MetadataSecondaryIndexes.GROUPNAME_ON_DATASET_INDEX, groupNameTuple);
                 } catch (TreeIndexException tie) {
-                    //ignore this exception and continue deleting all relevant artifacts.
+                    // ignore this exception and continue deleting all relevant
+                    // artifacts.
                 }
             }
             // Delete entry from secondary index 'type'.
@@ -402,7 +404,8 @@
                         MetadataSecondaryIndexes.DATATYPENAME_ON_DATASET_INDEX, dataTypeSearchKey);
                 deleteTupleFromIndex(jobId, MetadataSecondaryIndexes.DATATYPENAME_ON_DATASET_INDEX, dataTypeTuple);
             } catch (TreeIndexException tie) {
-                //ignore this exception and continue deleting all relevant artifacts.
+                // ignore this exception and continue deleting all relevant
+                // artifacts.
             }
 
             // Delete entry(s) from the 'indexes' dataset.
@@ -502,7 +505,8 @@
             // Searches the index for the tuple to be deleted. Acquires an S
             // lock on the 'datatype' dataset.
             ITupleReference tuple = getTupleToBeDeleted(jobId, MetadataPrimaryIndexes.DATATYPE_DATASET, searchKey);
-            // This call uses the secondary index on datatype. Get nested types before deleting entry from secondary index.
+            // This call uses the secondary index on datatype. Get nested types
+            // before deleting entry from secondary index.
             List<String> nestedTypes = getNestedDatatypeNames(jobId, dataverseName, datatypeName);
             deleteTupleFromIndex(jobId, MetadataPrimaryIndexes.DATATYPE_DATASET, tuple);
             deleteFromDatatypeSecondaryIndex(jobId, dataverseName, datatypeName);
@@ -568,7 +572,7 @@
         long resourceID = metadataIndex.getResourceID();
         ILSMIndex lsmIndex = (ILSMIndex) indexLifecycleManager.getIndex(resourceID);
         indexLifecycleManager.open(resourceID);
-        //prepare a Callback for logging
+        // prepare a Callback for logging
         IModificationOperationCallback modCallback = createIndexModificationCallback(jobId, resourceID, metadataIndex,
                 lsmIndex, IndexOperation.DELETE);
         IIndexAccessor indexAccessor = lsmIndex.createAccessor(modCallback, NoOpOperationCallback.INSTANCE);
@@ -822,7 +826,8 @@
         }
         try {
             // Delete entry from the 'function' dataset.
-            ITupleReference searchKey = createTuple(functionSignature.getNamespace(), functionSignature.getName());
+            ITupleReference searchKey = createTuple(functionSignature.getNamespace(), functionSignature.getName(), ""
+                    + functionSignature.getArity());
             // Searches the index for the tuple to be deleted. Acquires an S
             // lock on the 'function' dataset.
             ITupleReference datasetTuple = getTupleToBeDeleted(jobId, MetadataPrimaryIndexes.FUNCTION_DATASET,
@@ -853,7 +858,7 @@
         return results.get(0);
     }
 
-    //Debugging Method
+    // Debugging Method
     public String printMetadata() {
 
         StringBuilder sb = new StringBuilder();
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/declared/AqlMetadataProvider.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/declared/AqlMetadataProvider.java
index 117f492..29bafa9 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/declared/AqlMetadataProvider.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/declared/AqlMetadataProvider.java
@@ -34,6 +34,7 @@
 import edu.uci.ics.asterix.common.transactions.IResourceManager.ResourceType;
 import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.dataflow.data.nontagged.valueproviders.AqlPrimitiveValueProviderFactory;
+import edu.uci.ics.asterix.external.adapter.factory.HDFSAdapterFactory;
 import edu.uci.ics.asterix.external.adapter.factory.IAdapterFactory;
 import edu.uci.ics.asterix.external.adapter.factory.IGenericDatasetAdapterFactory;
 import edu.uci.ics.asterix.external.adapter.factory.ITypedDatasetAdapterFactory;
@@ -101,6 +102,7 @@
 import edu.uci.ics.hyracks.algebricks.runtime.base.IPushRuntimeFactory;
 import edu.uci.ics.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
 import edu.uci.ics.hyracks.algebricks.runtime.operators.std.SinkWriterRuntimeFactory;
+import edu.uci.ics.hyracks.api.context.ICCContext;
 import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
 import edu.uci.ics.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
@@ -119,6 +121,7 @@
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.dataflow.std.file.ITupleParserFactory;
 import edu.uci.ics.hyracks.dataflow.std.result.ResultWriterOperatorDescriptor;
+import edu.uci.ics.hyracks.hdfs.scheduler.Scheduler;
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.BTreeSearchOperatorDescriptor;
 import edu.uci.ics.hyracks.storage.am.btree.frames.BTreeNSMInteriorFrameFactory;
 import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProviderFactory;
@@ -157,6 +160,7 @@
     private final AsterixStorageProperties storageProperties;
 
     private static final Map<String, String> adapterFactoryMapping = initializeAdapterFactoryMapping();
+    private static Scheduler hdfsScheduler;
 
     public String getPropertyValue(String propertyName) {
         return config.get(propertyName);
@@ -178,6 +182,16 @@
         this.defaultDataverse = defaultDataverse;
         this.stores = AsterixAppContextInfo.getInstance().getMetadataProperties().getStores();
         this.storageProperties = AsterixAppContextInfo.getInstance().getStorageProperties();
+        ICCContext ccContext = AsterixAppContextInfo.getInstance().getCCApplicationContext().getCCContext();
+        try {
+            if (hdfsScheduler == null) {
+                //set the singleton hdfs scheduler
+                hdfsScheduler = new Scheduler(ccContext.getClusterControllerInfo().getClientNetAddress(), ccContext
+                        .getClusterControllerInfo().getClientNetPort());
+            }
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
     }
 
     public void setJobId(JobId jobId) {
@@ -343,8 +357,8 @@
                 adapterFactory = (IGenericDatasetAdapterFactory) Class.forName(adapterFactoryClassname).newInstance();
             }
 
-            adapter = ((IGenericDatasetAdapterFactory) adapterFactory).createAdapter(datasetDetails.getProperties(),
-                    itemType);
+            adapter = ((IGenericDatasetAdapterFactory) adapterFactory).createAdapter(
+                    wrapProperties(datasetDetails.getProperties()), itemType);
         } catch (AlgebricksException ae) {
             throw ae;
         } catch (Exception e) {
@@ -362,7 +376,7 @@
         RecordDescriptor scannerDesc = new RecordDescriptor(new ISerializerDeserializer[] { payloadSerde });
 
         ExternalDataScanOperatorDescriptor dataScanner = new ExternalDataScanOperatorDescriptor(jobSpec,
-                adapterFactoryClassname, datasetDetails.getProperties(), rt, scannerDesc);
+                wrapPropertiesEmpty(datasetDetails.getProperties()), rt, scannerDesc, adapterFactory);
 
         AlgebricksPartitionConstraint constraint;
         try {
@@ -427,14 +441,15 @@
             }
 
             if (adapterFactory instanceof ITypedDatasetAdapterFactory) {
-                adapter = ((ITypedDatasetAdapterFactory) adapterFactory).createAdapter(datasetDetails.getProperties());
+                adapter = ((ITypedDatasetAdapterFactory) adapterFactory).createAdapter(wrapProperties(datasetDetails
+                        .getProperties()));
                 adapterOutputType = ((ITypedDatasourceAdapter) adapter).getAdapterOutputType();
             } else if (adapterFactory instanceof IGenericDatasetAdapterFactory) {
                 String outputTypeName = datasetDetails.getProperties().get(IGenericDatasetAdapterFactory.KEY_TYPE_NAME);
                 adapterOutputType = MetadataManager.INSTANCE.getDatatype(mdTxnCtx, dataset.getDataverseName(),
                         outputTypeName).getDatatype();
                 adapter = ((IGenericDatasetAdapterFactory) adapterFactory).createAdapter(
-                        datasetDetails.getProperties(), adapterOutputType);
+                        wrapProperties(datasetDetails.getProperties()), adapterOutputType);
             } else {
                 throw new IllegalStateException(" Unknown factory type for " + adapterFactoryClassname);
             }
@@ -451,7 +466,8 @@
 
         FeedIntakeOperatorDescriptor feedIngestor = new FeedIntakeOperatorDescriptor(jobSpec, new FeedId(
                 dataset.getDataverseName(), dataset.getDatasetName()), adapterFactoryClassname,
-                datasetDetails.getProperties(), (ARecordType) adapterOutputType, feedDesc);
+                this.wrapPropertiesEmpty(datasetDetails.getProperties()), (ARecordType) adapterOutputType, feedDesc,
+                adapterFactory);
 
         AlgebricksPartitionConstraint constraint = null;
         try {
@@ -1484,4 +1500,32 @@
         return FormatUtils.getDefaultFormat();
     }
 
+    /**
+     * Add HDFS scheduler and the cluster location constraint into the scheduler
+     * 
+     * @param properties
+     *            the original dataset properties
+     * @return a new map containing the original dataset properties and the scheduler/locations
+     */
+    private Map<String, Object> wrapProperties(Map<String, String> properties) {
+        Map<String, Object> wrappedProperties = new HashMap<String, Object>();
+        wrappedProperties.putAll(properties);
+        wrappedProperties.put(HDFSAdapterFactory.SCHEDULER, hdfsScheduler);
+        wrappedProperties.put(HDFSAdapterFactory.CLUSTER_LOCATIONS, getClusterLocations());
+        return wrappedProperties;
+    }
+
+    /**
+     * Adapt the original properties to a string-object map
+     * 
+     * @param properties
+     *            the original properties
+     * @return the new stirng-object map
+     */
+    private Map<String, Object> wrapPropertiesEmpty(Map<String, String> properties) {
+        Map<String, Object> wrappedProperties = new HashMap<String, Object>();
+        wrappedProperties.putAll(properties);
+        return wrappedProperties;
+    }
+
 }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/base/TypeComputerUtilities.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/base/TypeComputerUtilities.java
index 2c7ff10..84d177f 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/base/TypeComputerUtilities.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/base/TypeComputerUtilities.java
@@ -23,9 +23,9 @@
     public static boolean setRequiredAndInputTypes(AbstractFunctionCallExpression expr, IAType requiredRecordType,
             IAType inputRecordType) {
         boolean changed = false;
-        Object opaqueParameter = expr.getOpaqueParameters();
-        if (opaqueParameter == null) {
-            Object[] opaqueParameters = new Object[2];
+        Object[] opaqueParameters = expr.getOpaqueParameters();
+        if (opaqueParameters == null) {
+            opaqueParameters = new Object[2];
             opaqueParameters[0] = requiredRecordType;
             opaqueParameters[1] = inputRecordType;
             expr.setOpaqueParameters(opaqueParameters);
@@ -34,6 +34,10 @@
         return changed;
     }
 
+    public static void resetRequiredAndInputTypes(AbstractFunctionCallExpression expr) {
+        expr.setOpaqueParameters(null);
+    }
+
     public static IAType getRequiredType(AbstractFunctionCallExpression expr) {
         Object[] type = expr.getOpaqueParameters();
         if (type != null) {
diff --git a/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/external/data/RateControlledFileSystemBasedAdapter.java b/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/external/data/RateControlledFileSystemBasedAdapter.java
index 84b989d..afdf343 100644
--- a/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/external/data/RateControlledFileSystemBasedAdapter.java
+++ b/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/external/data/RateControlledFileSystemBasedAdapter.java
@@ -19,7 +19,6 @@
 import java.util.Map;
 
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
-import edu.uci.ics.asterix.external.adapter.factory.IGenericDatasetAdapterFactory;
 import edu.uci.ics.asterix.external.dataset.adapter.FileSystemBasedAdapter;
 import edu.uci.ics.asterix.external.dataset.adapter.ITypedDatasourceAdapter;
 import edu.uci.ics.asterix.feed.managed.adapter.IManagedFeedAdapter;
@@ -47,48 +46,15 @@
         IManagedFeedAdapter {
 
     private static final long serialVersionUID = 1L;
+    private FileSystemBasedAdapter coreAdapter;
+    private String format;
 
-    public static final String KEY_FILE_SYSTEM = "fs";
-    public static final String LOCAL_FS = "localfs";
-    public static final String HDFS = "hdfs";
-
-    private final FileSystemBasedAdapter coreAdapter;
-    private final Map<String, String> configuration;
-    private final String fileSystem;
-    private final String format;
-
-    public RateControlledFileSystemBasedAdapter(ARecordType atype, Map<String, String> configuration) throws Exception {
+    public RateControlledFileSystemBasedAdapter(ARecordType atype, Map<String, Object> configuration,
+            FileSystemBasedAdapter coreAdapter, String format) throws Exception {
         super(atype);
-        checkRequiredArgs(configuration);
-        fileSystem = configuration.get(KEY_FILE_SYSTEM);
-        String adapterFactoryClass = null;
-        if (fileSystem.equalsIgnoreCase(LOCAL_FS)) {
-            adapterFactoryClass = "edu.uci.ics.asterix.external.adapter.factory.NCFileSystemAdapterFactory";
-        } else if (fileSystem.equals(HDFS)) {
-            adapterFactoryClass = "edu.uci.ics.asterix.external.adapter.factory.HDFSAdapterFactory";
-        } else {
-            throw new AsterixException("Unsupported file system type " + fileSystem);
-        }
-        format = configuration.get(KEY_FORMAT);
-        IGenericDatasetAdapterFactory adapterFactory = (IGenericDatasetAdapterFactory) Class.forName(
-                adapterFactoryClass).newInstance();
-        coreAdapter = (FileSystemBasedAdapter) adapterFactory.createAdapter(configuration, atype);
         this.configuration = configuration;
-    }
-
-    private void checkRequiredArgs(Map<String, String> configuration) throws Exception {
-        if (configuration.get(KEY_FILE_SYSTEM) == null) {
-            throw new Exception("File system type not specified. (fs=?) File system could be 'localfs' or 'hdfs'");
-        }
-        if (configuration.get(IGenericDatasetAdapterFactory.KEY_TYPE_NAME) == null) {
-            throw new Exception("Record type not specified (output-type-name=?)");
-        }
-        if (configuration.get(KEY_PATH) == null) {
-            throw new Exception("File path not specified (path=?)");
-        }
-        if (configuration.get(KEY_FORMAT) == null) {
-            throw new Exception("File format not specified (format=?)");
-        }
+        this.coreAdapter = coreAdapter;
+        this.format = format;
     }
 
     @Override
@@ -103,7 +69,7 @@
     }
 
     @Override
-    public void configure(Map<String, String> arguments) throws Exception {
+    public void configure(Map<String, Object> arguments) throws Exception {
         coreAdapter.configure(arguments);
     }
 
@@ -189,16 +155,16 @@
 
     private final ARecordType recordType;
     private final IDataParser dataParser;
-    private final Map<String, String> configuration;
+    private final Map<String, Object> configuration;
 
     public RateControlledTupleParserFactory(ARecordType recordType, IValueParserFactory[] valueParserFactories,
-            char fieldDelimiter, Map<String, String> configuration) {
+            char fieldDelimiter, Map<String, Object> configuration) {
         this.recordType = recordType;
         dataParser = new DelimitedDataParser(recordType, valueParserFactories, fieldDelimiter);
         this.configuration = configuration;
     }
 
-    public RateControlledTupleParserFactory(ARecordType recordType, Map<String, String> configuration) {
+    public RateControlledTupleParserFactory(ARecordType recordType, Map<String, Object> configuration) {
         this.recordType = recordType;
         dataParser = new ADMDataParser();
         this.configuration = configuration;
@@ -221,10 +187,10 @@
     public static final String INTER_TUPLE_INTERVAL = "tuple-interval";
 
     public RateControlledTupleParser(IHyracksTaskContext ctx, ARecordType recType, IDataParser dataParser,
-            Map<String, String> configuration) {
+            Map<String, Object> configuration) {
         super(ctx, recType);
         this.dataParser = dataParser;
-        String propValue = configuration.get(INTER_TUPLE_INTERVAL);
+        String propValue = (String) configuration.get(INTER_TUPLE_INTERVAL);
         if (propValue != null) {
             interTupleInterval = Long.parseLong(propValue);
         } else {
diff --git a/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/external/data/RateControlledFileSystemBasedAdapterFactory.java b/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/external/data/RateControlledFileSystemBasedAdapterFactory.java
index 6c32acb..bf1c268 100644
--- a/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/external/data/RateControlledFileSystemBasedAdapterFactory.java
+++ b/asterix-tools/src/main/java/edu/uci/ics/asterix/tools/external/data/RateControlledFileSystemBasedAdapterFactory.java
@@ -16,7 +16,9 @@
 
 import java.util.Map;
 
+import edu.uci.ics.asterix.common.exceptions.AsterixException;
 import edu.uci.ics.asterix.external.adapter.factory.IGenericDatasetAdapterFactory;
+import edu.uci.ics.asterix.external.dataset.adapter.FileSystemBasedAdapter;
 import edu.uci.ics.asterix.external.dataset.adapter.IDatasourceAdapter;
 import edu.uci.ics.asterix.om.types.ARecordType;
 import edu.uci.ics.asterix.om.types.IAType;
@@ -28,10 +30,37 @@
  * source file has been ingested.
  */
 public class RateControlledFileSystemBasedAdapterFactory implements IGenericDatasetAdapterFactory {
+    private static final long serialVersionUID = 1L;
+    
+    public static final String KEY_FILE_SYSTEM = "fs";
+    public static final String LOCAL_FS = "localfs";
+    public static final String HDFS = "hdfs";
+    public static final String KEY_PATH = "path";
+    public static final String KEY_FORMAT = "format";
+
+    private IGenericDatasetAdapterFactory adapterFactory;
+    private String format;
+    private boolean setup = false;
 
     @Override
-    public IDatasourceAdapter createAdapter(Map<String, String> configuration, IAType type) throws Exception {
-        return new RateControlledFileSystemBasedAdapter((ARecordType) type, configuration);
+    public IDatasourceAdapter createAdapter(Map<String, Object> configuration, IAType type) throws Exception {
+        if (!setup) {
+            checkRequiredArgs(configuration);
+            String fileSystem = (String) configuration.get(KEY_FILE_SYSTEM);
+            String adapterFactoryClass = null;
+            if (fileSystem.equalsIgnoreCase(LOCAL_FS)) {
+                adapterFactoryClass = "edu.uci.ics.asterix.external.adapter.factory.NCFileSystemAdapterFactory";
+            } else if (fileSystem.equals(HDFS)) {
+                adapterFactoryClass = "edu.uci.ics.asterix.external.adapter.factory.HDFSAdapterFactory";
+            } else {
+                throw new AsterixException("Unsupported file system type " + fileSystem);
+            }
+            format = (String) configuration.get(KEY_FORMAT);
+            adapterFactory = (IGenericDatasetAdapterFactory) Class.forName(adapterFactoryClass).newInstance();
+            setup = true;
+        }
+        return new RateControlledFileSystemBasedAdapter((ARecordType) type, configuration,
+                (FileSystemBasedAdapter) adapterFactory.createAdapter(configuration, type), format);
     }
 
     @Override
@@ -39,4 +68,19 @@
         return "file_feed";
     }
 
+    private void checkRequiredArgs(Map<String, Object> configuration) throws Exception {
+        if (configuration.get(KEY_FILE_SYSTEM) == null) {
+            throw new Exception("File system type not specified. (fs=?) File system could be 'localfs' or 'hdfs'");
+        }
+        if (configuration.get(IGenericDatasetAdapterFactory.KEY_TYPE_NAME) == null) {
+            throw new Exception("Record type not specified (output-type-name=?)");
+        }
+        if (configuration.get(KEY_PATH) == null) {
+            throw new Exception("File path not specified (path=?)");
+        }
+        if (configuration.get(KEY_FORMAT) == null) {
+            throw new Exception("File format not specified (format=?)");
+        }
+    }
+
 }
\ No newline at end of file
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/DatasetLockInfo.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/DatasetLockInfo.java
index d5e525a..d583352 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/DatasetLockInfo.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/DatasetLockInfo.java
@@ -437,6 +437,20 @@
 
         return s.toString();
     }
+    
+    public String coreDump() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("\n\t firstUpgrader: " + firstUpgrader);
+        sb.append("\n\t firstWaiter: " + firstWaiter);
+        sb.append("\n\t lastHolder: " + lastHolder);
+        sb.append("\n\t ISCount: " + ISCount);
+        sb.append("\n\t IXCount: " + IXCount);
+        sb.append("\n\t SCount: " + SCount);
+        sb.append("\n\t XCount: " + XCount);
+        sb.append("\n\t entityResourceHT");
+        sb.append(entityResourceHT.prettyPrint());
+        return sb.toString();
+    }
 
     /////////////////////////////////////////////////////////
     //  set/get method for private variable
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/EntityInfoManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/EntityInfoManager.java
index 5d81e8a..206a3bf 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/EntityInfoManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/EntityInfoManager.java
@@ -15,6 +15,8 @@
 
 package edu.uci.ics.asterix.transaction.management.service.locking;
 
+import java.io.IOException;
+import java.io.OutputStream;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 
@@ -272,29 +274,35 @@
             if (child.isDeinitialized()) {
                 continue;
             }
-            s.append("child[" + i + "]: occupiedSlots:" + child.getNumOfOccupiedSlots());
-            s.append(" freeSlotNum:" + child.getFreeSlotNum() + "\n");
-            s.append("\tjid\t").append("did\t").append("PK\t").append("DLM\t").append("DLC\t").append("ELM\t")
-                    .append("ELC\t").append("NEA\t").append("PJR\t").append("NJR\n");
-            for (int j = 0; j < ChildEntityInfoArrayManager.NUM_OF_SLOTS; j++) {
-                s.append(j).append(": ");
-                s.append("\t" + child.getJobId(j));
-                s.append("\t" + child.getDatasetId(j));
-                s.append("\t" + child.getPKHashVal(j));
-                s.append("\t" + child.getDatasetLockMode(j));
-                s.append("\t" + child.getDatasetLockCount(j));
-                s.append("\t" + child.getEntityLockMode(j));
-                s.append("\t" + child.getEntityLockCount(j));
-                s.append("\t" + child.getNextEntityActor(j));
-                s.append("\t" + child.getPrevJobResource(j));
-                s.append("\t" + child.getNextJobResource(j));
-                //s.append("\t" + child.getNextDatasetActor(j));
-                s.append("\n");
-            }
-            s.append("\n");
+            s.append("child[" + i + "]");
+            s.append(child.prettyPrint());
         }
         return s.toString();
     }
+    
+    public void coreDump(OutputStream os) {
+        StringBuilder sb = new StringBuilder("\n\t########### EntityLockInfoManager Status #############\n");
+        int size = pArray.size();
+        ChildEntityInfoArrayManager child;
+
+        sb.append("Number of Child: " + size + "\n"); 
+        for (int i = 0; i < size; i++) {
+            try {
+                child = pArray.get(i);
+                sb.append("child[" + i + "]");
+                sb.append(child.prettyPrint());
+                
+                os.write(sb.toString().getBytes());
+            } catch (IOException e) {
+                //ignore IOException
+            }
+            sb = new StringBuilder();
+        }
+    }
+    
+    public int getShrinkTimerThreshold() {
+        return SHRINK_TIMER_THRESHOLD;
+    }
 
     public void initEntityInfo(int slotNum, int jobId, int datasetId, int PKHashVal, byte lockMode) {
         pArray.get(slotNum / ChildEntityInfoArrayManager.NUM_OF_SLOTS).initEntityInfo(
@@ -567,6 +575,29 @@
     public int getFreeSlotNum() {
         return freeSlotNum;
     }
+    
+    public String prettyPrint() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("\n\toccupiedSlots:" + getNumOfOccupiedSlots());
+        sb.append("\n\tfreeSlotNum:" + getFreeSlotNum() + "\n");
+        sb.append("\tjid\t").append("did\t").append("PK\t").append("DLM\t").append("DLC\t").append("ELM\t")
+                .append("ELC\t").append("NEA\t").append("PJR\t").append("NJR\n");
+        for (int j = 0; j < ChildEntityInfoArrayManager.NUM_OF_SLOTS; j++) {
+            sb.append(j).append(": ");
+            sb.append("\t" + getJobId(j));
+            sb.append("\t" + getDatasetId(j));
+            sb.append("\t" + getPKHashVal(j));
+            sb.append("\t" + getDatasetLockMode(j));
+            sb.append("\t" + getDatasetLockCount(j));
+            sb.append("\t" + getEntityLockMode(j));
+            sb.append("\t" + getEntityLockCount(j));
+            sb.append("\t" + getNextEntityActor(j));
+            sb.append("\t" + getPrevJobResource(j));
+            sb.append("\t" + getNextJobResource(j));
+            sb.append("\n");
+        }
+        return sb.toString();
+    }
 
     //////////////////////////////////////////////////////////////////
     //   set/get method for each field of EntityInfo plus freeSlot
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/EntityLockInfoManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/EntityLockInfoManager.java
index ca00aa2..2fae460 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/EntityLockInfoManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/EntityLockInfoManager.java
@@ -15,6 +15,8 @@
 
 package edu.uci.ics.asterix.transaction.management.service.locking;
 
+import java.io.IOException;
+import java.io.OutputStream;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 
@@ -271,22 +273,35 @@
             if (child.isDeinitialized()) {
                 continue;
             }
-            s.append("child[" + i + "]: occupiedSlots:" + child.getNumOfOccupiedSlots());
-            s.append(" freeSlotNum:" + child.getFreeSlotNum() + "\n");
-            s.append("\tX\t").append("S\t").append("LH\t").append("FW\t").append("UP\n");
-            for (int j = 0; j < ChildEntityLockInfoArrayManager.NUM_OF_SLOTS; j++) {
-                s.append(j).append(": ");
-                s.append("\t" + child.getXCount(j));
-                s.append("\t" + child.getSCount(j));
-                s.append("\t" + child.getLastHolder(j));
-                s.append("\t" + child.getFirstWaiter(j));
-                s.append("\t" + child.getUpgrader(j));
-                s.append("\n");
-            }
-            s.append("\n");
+            s.append("child[" + i + "]");
+            s.append(child.prettyPrint());
         }
         return s.toString();
     }
+    
+    public void coreDump(OutputStream os) {
+        StringBuilder sb = new StringBuilder("\n\t########### EntityLockInfoManager Status #############\n");
+        int size = pArray.size();
+        ChildEntityLockInfoArrayManager child;
+
+        sb.append("Number of Child: " + size + "\n"); 
+        for (int i = 0; i < size; i++) {
+            try {
+                child = pArray.get(i);
+                sb.append("child[" + i + "]");
+                sb.append(child.prettyPrint());
+                
+                os.write(sb.toString().getBytes());
+            } catch (IOException e) {
+                //ignore IOException
+            }
+            sb = new StringBuilder();
+        }
+    }
+    
+    public int getShrinkTimerThreshold() {
+        return SHRINK_TIMER_THRESHOLD;
+    }
 
     //debugging method
     public String printWaiters(int slotNum) {
@@ -736,6 +751,23 @@
     public int getFreeSlotNum() {
         return freeSlotNum;
     }
+    
+    public String prettyPrint() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("\n\toccupiedSlots:" + getNumOfOccupiedSlots());
+        sb.append("\n\tfreeSlotNum:" + getFreeSlotNum());
+        sb.append("\n\tX\t").append("S\t").append("LH\t").append("FW\t").append("UP\n");
+        for (int j = 0; j < ChildEntityLockInfoArrayManager.NUM_OF_SLOTS; j++) {
+            sb.append(j).append(": ");
+            sb.append("\t" + getXCount(j));
+            sb.append("\t" + getSCount(j));
+            sb.append("\t" + getLastHolder(j));
+            sb.append("\t" + getFirstWaiter(j));
+            sb.append("\t" + getUpgrader(j));
+            sb.append("\n");
+        }
+        return sb.toString();
+    }
 
     //////////////////////////////////////////////////////////////////
     //   set/get method for each field of EntityLockInfo plus freeSlot
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/JobInfo.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/JobInfo.java
index d846603..8bf5304 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/JobInfo.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/JobInfo.java
@@ -275,6 +275,17 @@
         }
         return s.toString();
     }
+    
+    public String coreDump() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("\n\t datasetISLockHT");
+        sb.append(datasetISLockHT.prettyPrint());
+        sb.append("\n\t firstWaitingResource: " + firstWaitingResource);
+        sb.append("\n\t lastHoldingResource: " + lastHoldingResource);
+        sb.append("\n\t upgradingResource: " + upgradingResource);
+        sb.append("\n\t jobCtx.jobId: " + jobCtx.getJobId());
+        return sb.toString();
+    }
 
     /////////////////////////////////////////////////////////
     //  set/get method for private variable
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManager.java
index 8fb7494..cf41199 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockManager.java
@@ -15,10 +15,13 @@
 
 package edu.uci.ics.asterix.transaction.management.service.locking;
 
+import java.io.IOException;
+import java.io.OutputStream;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;
+import java.util.Set;
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
@@ -33,6 +36,7 @@
 import edu.uci.ics.asterix.transaction.management.service.logging.LogUtil;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
+import edu.uci.ics.hyracks.api.lifecycle.ILifeCycleComponent;
 
 /**
  * An implementation of the ILockManager interface for the
@@ -42,7 +46,7 @@
  * @author pouria, kisskys
  */
 
-public class LockManager implements ILockManager {
+public class LockManager implements ILockManager, ILifeCycleComponent {
 
     public static final boolean IS_DEBUG_MODE = false;//true
     //This variable indicates that the dataset granule X lock request is allowed when 
@@ -2046,6 +2050,182 @@
             unlatchLockTable();
         }
     }
+
+    @Override
+    public void start() {
+        //no op
+    }
+
+    @Override
+    public void stop(boolean dumpState, OutputStream os) {
+        if (dumpState) {
+
+            //#. dump Configurable Variables
+            dumpConfVars(os);
+
+            //#. dump jobHT
+            dumpJobInfo(os);
+
+            //#. dump datasetResourceHT
+            dumpDatasetLockInfo(os);
+
+            //#. dump entityLockInfoManager
+            dumpEntityLockInfo(os);
+
+            //#. dump entityInfoManager
+            dumpEntityInfo(os);
+
+            //#. dump lockWaiterManager
+
+            dumpLockWaiterInfo(os);
+            try {
+                os.flush();
+            } catch (IOException e) {
+                //ignore
+            }
+        }
+    }
+
+    private void dumpConfVars(OutputStream os) {
+        try {
+            StringBuilder sb = new StringBuilder();
+            sb.append("\n>>dump_begin\t>>----- [ConfVars] -----");
+            sb.append("\nESCALATE_TRHESHOLD_ENTITY_TO_DATASET: " + ESCALATE_TRHESHOLD_ENTITY_TO_DATASET);
+            sb.append("\nSHRINK_TIMER_THRESHOLD (entityLockInfoManager): "
+                    + entityLockInfoManager.getShrinkTimerThreshold());
+            sb.append("\nSHRINK_TIMER_THRESHOLD (entityInfoManager): " + entityInfoManager.getShrinkTimerThreshold());
+            sb.append("\nSHRINK_TIMER_THRESHOLD (lockWaiterManager): " + lockWaiterManager.getShrinkTimerThreshold());
+            sb.append("\n>>dump_end\t>>----- [ConfVars] -----\n");
+            os.write(sb.toString().getBytes());
+        } catch (Exception e) {
+            //ignore exception and continue dumping as much as possible.
+            if (IS_DEBUG_MODE) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void dumpJobInfo(OutputStream os) {
+        JobId jobId;
+        JobInfo jobInfo;
+        StringBuilder sb = new StringBuilder();
+
+        try {
+            sb.append("\n>>dump_begin\t>>----- [JobInfo] -----");
+            Set<Map.Entry<JobId, JobInfo>> entrySet = jobHT.entrySet();
+            if (entrySet != null) {
+                for (Map.Entry<JobId, JobInfo> entry : entrySet) {
+                    if (entry != null) {
+                        jobId = entry.getKey();
+                        if (jobId != null) {
+                            sb.append("\n" + jobId);
+                        } else {
+                            sb.append("\nJID:null");
+                        }
+
+                        jobInfo = entry.getValue();
+                        if (jobInfo != null) {
+                            sb.append(jobInfo.coreDump());
+                        } else {
+                            sb.append("\nJobInfo:null");
+                        }
+                    }
+                }
+            }
+            sb.append("\n>>dump_end\t>>----- [JobInfo] -----\n");
+            os.write(sb.toString().getBytes());
+        } catch (Exception e) {
+            //ignore exception and continue dumping as much as possible.
+            if (IS_DEBUG_MODE) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void dumpDatasetLockInfo(OutputStream os) {
+        DatasetId datasetId;
+        DatasetLockInfo datasetLockInfo;
+        StringBuilder sb = new StringBuilder();
+
+        try {
+            sb.append("\n>>dump_begin\t>>----- [DatasetLockInfo] -----");
+            Set<Map.Entry<DatasetId, DatasetLockInfo>> entrySet = datasetResourceHT.entrySet();
+            if (entrySet != null) {
+                for (Map.Entry<DatasetId, DatasetLockInfo> entry : entrySet) {
+                    if (entry != null) {
+                        datasetId = entry.getKey();
+                        if (datasetId != null) {
+                            sb.append("\nDatasetId:" + datasetId.getId());
+                        } else {
+                            sb.append("\nDatasetId:null");
+                        }
+
+                        datasetLockInfo = entry.getValue();
+                        if (datasetLockInfo != null) {
+                            sb.append(datasetLockInfo.coreDump());
+                        } else {
+                            sb.append("\nDatasetLockInfo:null");
+                        }
+                    }
+                    sb.append("\n>>dump_end\t>>----- [DatasetLockInfo] -----\n");
+                    os.write(sb.toString().getBytes());
+
+                    //create a new sb to avoid possible OOM exception
+                    sb = new StringBuilder();
+                }
+            }
+        } catch (Exception e) {
+            //ignore exception and continue dumping as much as possible.
+            if (IS_DEBUG_MODE) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void dumpEntityLockInfo(OutputStream os) {
+        StringBuilder sb = new StringBuilder();
+        try {
+            sb.append("\n>>dump_begin\t>>----- [EntityLockInfo] -----");
+            entityLockInfoManager.coreDump(os);
+            sb.append("\n>>dump_end\t>>----- [EntityLockInfo] -----\n");
+            os.write(sb.toString().getBytes());
+        } catch (Exception e) {
+            //ignore exception and continue dumping as much as possible.
+            if (IS_DEBUG_MODE) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void dumpEntityInfo(OutputStream os) {
+        StringBuilder sb = new StringBuilder();
+        try {
+            sb.append("\n>>dump_begin\t>>----- [EntityInfo] -----");
+            entityInfoManager.coreDump(os);
+            sb.append("\n>>dump_end\t>>----- [EntityInfo] -----\n");
+            os.write(sb.toString().getBytes());
+        } catch (Exception e) {
+            //ignore exception and continue dumping as much as possible.
+            if (IS_DEBUG_MODE) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void dumpLockWaiterInfo(OutputStream os) {
+        StringBuilder sb = new StringBuilder();
+        try {
+            sb.append("\n>>dump_begin\t>>----- [LockWaiterInfo] -----");
+            lockWaiterManager.coreDump(os);
+            sb.append("\n>>dump_end\t>>----- [LockWaiterInfo] -----\n");
+            os.write(sb.toString().getBytes());
+        } catch (Exception e) {
+            //ignore exception and continue dumping as much as possible.
+            if (IS_DEBUG_MODE) {
+                e.printStackTrace();
+            }
+        }
+    }
 }
 
 class ConsecutiveWakeupContext {
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockWaiterManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockWaiterManager.java
index bd414de..c6fcbd5 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockWaiterManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/LockWaiterManager.java
@@ -15,6 +15,8 @@
 
 package edu.uci.ics.asterix.transaction.management.service.locking;
 
+import java.io.IOException;
+import java.io.OutputStream;
 import java.util.ArrayList;
 
 /**
@@ -258,28 +260,42 @@
         StringBuilder s = new StringBuilder("\n########### LockWaiterManager Status #############\n");
         int size = pArray.size();
         ChildLockWaiterArrayManager child;
-        LockWaiter waiter;
 
         for (int i = 0; i < size; i++) {
             child = pArray.get(i);
             if (child.isDeinitialized()) {
                 continue;
             }
-            s.append("child[" + i + "]: occupiedSlots:" + child.getNumOfOccupiedSlots());
-            s.append(" freeSlotNum:" + child.getFreeSlotNum() + "\n");
-            for (int j = 0; j < ChildLockWaiterArrayManager.NUM_OF_SLOTS; j++) {
-                waiter = child.getLockWaiter(j);
-                s.append(j).append(": ");
-                s.append("\t" + waiter.getEntityInfoSlot());
-                s.append("\t" + waiter.needWait());
-                s.append("\t" + waiter.isVictim());
-                s.append("\n");
-            }
-            s.append("\n");
+            s.append("child[" + i + "]");
+            s.append(child.prettyPrint());
         }
         return s.toString();
     }
     
+    public void coreDump(OutputStream os) {
+        StringBuilder sb = new StringBuilder("\n########### LockWaiterManager Status #############\n");
+        int size = pArray.size();
+        ChildLockWaiterArrayManager child;
+
+        sb.append("Number of Child: " + size + "\n"); 
+        for (int i = 0; i < size; i++) {
+            try {
+                child = pArray.get(i);
+                sb.append("child[" + i + "]");
+                sb.append(child.prettyPrint());
+                
+                os.write(sb.toString().getBytes());
+            } catch (IOException e) {
+                //ignore IOException
+            }
+            sb = new StringBuilder();
+        }
+    }
+    
+    public int getShrinkTimerThreshold() {
+        return SHRINK_TIMER_THRESHOLD;
+    }
+    
     public LockWaiter getLockWaiter(int slotNum) {
         return pArray.get(slotNum / ChildLockWaiterArrayManager.NUM_OF_SLOTS).getLockWaiter(
                 slotNum % ChildLockWaiterArrayManager.NUM_OF_SLOTS);
@@ -364,4 +380,20 @@
     public int getFreeSlotNum() {
         return freeSlotNum;
     }
+    
+    public String prettyPrint() {
+        LockWaiter waiter;
+        StringBuilder sb = new StringBuilder();
+        sb.append("\n\toccupiedSlots:" + getNumOfOccupiedSlots());
+        sb.append("\n\tfreeSlotNum:" + getFreeSlotNum() + "\n");
+        for (int j = 0; j < ChildLockWaiterArrayManager.NUM_OF_SLOTS; j++) {
+            waiter = getLockWaiter(j);
+            sb.append(j).append(": ");
+            sb.append("\t" + waiter.getEntityInfoSlot());
+            sb.append("\t" + waiter.needWait());
+            sb.append("\t" + waiter.isVictim());
+            sb.append("\n");
+        }
+        return sb.toString();
+    }
 }
\ No newline at end of file
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/TimeOutDetector.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/TimeOutDetector.java
index a53c890..05052f0 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/TimeOutDetector.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/locking/TimeOutDetector.java
@@ -2,6 +2,7 @@
 
 import java.util.LinkedList;
 
+import edu.uci.ics.asterix.common.api.AsterixThreadExecutor;
 import edu.uci.ics.asterix.common.exceptions.ACIDException;
 
 /**
@@ -26,7 +27,7 @@
         this.lockMgr = lockMgr;
         this.trigger = new Thread(new TimeoutTrigger(this));
         trigger.setDaemon(true);
-        trigger.start();
+        AsterixThreadExecutor.INSTANCE.execute(trigger);
     }
 
     public void sweep() throws ACIDException {
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManager.java
index 318996a..205c5f2 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManager.java
@@ -17,6 +17,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 import java.io.RandomAccessFile;
 import java.nio.ByteBuffer;
 import java.nio.channels.FileChannel;
@@ -31,6 +32,7 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import edu.uci.ics.asterix.common.api.AsterixThreadExecutor;
 import edu.uci.ics.asterix.common.exceptions.ACIDException;
 import edu.uci.ics.asterix.common.transactions.FileBasedBuffer;
 import edu.uci.ics.asterix.common.transactions.FileUtil;
@@ -49,8 +51,9 @@
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManagementConstants;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.lifecycle.ILifeCycleComponent;
 
-public class LogManager implements ILogManager {
+public class LogManager implements ILogManager, ILifeCycleComponent {
 
     public static final boolean IS_DEBUG_MODE = false;//true
     private static final Logger LOGGER = Logger.getLogger(LogManager.class.getName());
@@ -185,7 +188,7 @@
          */
         logPageFlusher = new LogPageFlushThread(this);
         logPageFlusher.setDaemon(true);
-        logPageFlusher.start();
+        AsterixThreadExecutor.INSTANCE.execute(logPageFlusher);
     }
 
     public int getLogPageIndex(long lsnValue) {
@@ -758,6 +761,60 @@
 
         map.clear();
     }
+
+    @Override
+    public void start() {
+        //no op
+    }
+
+    @Override
+    public void stop(boolean dumpState, OutputStream os) {
+        if (dumpState) {
+            //#. dump Configurable Variables
+            dumpConfVars(os);
+
+            //#. dump LSNInfo
+            dumpLSNInfo(os);
+
+            try {
+                os.flush();
+            } catch (IOException e) {
+                //ignore
+            }
+        }
+    }
+
+    private void dumpConfVars(OutputStream os) {
+        try {
+            StringBuilder sb = new StringBuilder();
+            sb.append("\n>>dump_begin\t>>----- [ConfVars] -----");
+            sb.append(logManagerProperties.toString());
+            sb.append("\n>>dump_end\t>>----- [ConfVars] -----\n");
+            os.write(sb.toString().getBytes());
+        } catch (Exception e) {
+            //ignore exception and continue dumping as much as possible.
+            if (IS_DEBUG_MODE) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void dumpLSNInfo(OutputStream os) {
+        try {
+            StringBuilder sb = new StringBuilder();
+            sb.append("\n>>dump_begin\t>>----- [LSNInfo] -----");
+            sb.append("\nstartingLSN: " + startingLSN);
+            sb.append("\ncurrentLSN: " + lsn.get());
+            sb.append("\nlastFlushedLSN: " + lastFlushedLSN.get());
+            sb.append("\n>>dump_end\t>>----- [LSNInfo] -----\n");
+            os.write(sb.toString().getBytes());
+        } catch (Exception e) {
+            //ignore exception and continue dumping as much as possible.
+            if (IS_DEBUG_MODE) {
+                e.printStackTrace();
+            }
+        }
+    }
 }
 
 /*
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/RecoveryManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/RecoveryManager.java
index 50d4625..1e85c35 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/RecoveryManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/recovery/RecoveryManager.java
@@ -22,6 +22,7 @@
 import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
+import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -57,6 +58,7 @@
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionManager;
 import edu.uci.ics.asterix.transaction.management.service.transaction.TransactionSubsystem;
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.lifecycle.ILifeCycleComponent;
 import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
 import edu.uci.ics.hyracks.storage.am.common.api.IIndexLifecycleManager;
@@ -83,7 +85,7 @@
  * not in place completely. Once we have physical logging implemented, we would
  * add support for crash recovery.
  */
-public class RecoveryManager implements IRecoveryManager {
+public class RecoveryManager implements IRecoveryManager, ILifeCycleComponent {
 
     public static final boolean IS_DEBUG_MODE = false;//true
     private static final Logger LOGGER = Logger.getLogger(RecoveryManager.class.getName());
@@ -430,7 +432,7 @@
         if (isSharpCheckpoint && LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Starting sharp checkpoint ... ");
         }
-        
+
         LogManager logMgr = (LogManager) txnSubsystem.getLogManager();
         TransactionManager txnMgr = (TransactionManager) txnSubsystem.getTransactionManager();
         String logDir = logMgr.getLogManagerProperties().getLogDir();
@@ -522,7 +524,7 @@
         if (isSharpCheckpoint) {
             logMgr.renewLogFiles();
         }
-        
+
         if (isSharpCheckpoint && LOGGER.isLoggable(Level.INFO)) {
             LOGGER.info("Completed sharp checkpoint.");
         }
@@ -782,6 +784,16 @@
                     + undoCount);
         }
     }
+
+    @Override
+    public void start() {
+        //no op
+    }
+
+    @Override
+    public void stop(boolean dumpState, OutputStream os) {
+        //no op
+    }
 }
 
 class TxnId {
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionContext.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionContext.java
index 2659d8f..d4360ef 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionContext.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionContext.java
@@ -172,5 +172,15 @@
         return (o == this);
     }
 
-  
+    public String prettyPrint() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("\n" + jobId + "\n");
+        sb.append("transactionType: " + transactionType);
+        sb.append("firstLogLocator: " + firstLogLocator.getLsn() + "\n");
+        sb.append("lastLogLocator: " + lastLogLocator.getLsn() + "\n");
+        sb.append("TransactionState: " + txnState + "\n");
+        sb.append("startWaitTime: " + startWaitTime + "\n");
+        sb.append("status: " + status + "\n");
+        return sb.toString();
+    }
 }
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionManager.java
index 4e8808f..04f12ac 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/TransactionManager.java
@@ -14,8 +14,11 @@
  */
 package edu.uci.ics.asterix.transaction.management.service.transaction;
 
+import java.io.IOException;
+import java.io.OutputStream;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -26,15 +29,18 @@
 import edu.uci.ics.asterix.common.transactions.ITransactionManager;
 import edu.uci.ics.asterix.common.transactions.JobId;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogType;
+import edu.uci.ics.hyracks.api.lifecycle.ILifeCycleComponent;
 
 /**
  * An implementation of the @see ITransactionManager interface that provides
  * implementation of APIs for governing the lifecycle of a transaction.
  */
-public class TransactionManager implements ITransactionManager {
+public class TransactionManager implements ITransactionManager, ILifeCycleComponent {
+
+    public static final boolean IS_DEBUG_MODE = false;//true
     private static final Logger LOGGER = Logger.getLogger(TransactionManager.class.getName());
     private final TransactionSubsystem transactionProvider;
-    private Map<JobId, ITransactionContext> ITransactionContextRepository = new HashMap<JobId, ITransactionContext>();
+    private Map<JobId, ITransactionContext> transactionContextRepository = new HashMap<JobId, ITransactionContext>();
     private AtomicInteger maxJobId = new AtomicInteger(0);
 
     public TransactionManager(TransactionSubsystem provider) {
@@ -61,7 +67,7 @@
             } finally {
                 txnContext.releaseResources();
                 transactionProvider.getLockManager().releaseLocks(txnContext);
-                ITransactionContextRepository.remove(txnContext.getJobId());
+                transactionContextRepository.remove(txnContext.getJobId());
                 txnContext.setTxnState(TransactionState.ABORTED);
             }
         }
@@ -72,7 +78,7 @@
         setMaxJobId(jobId.getId());
         ITransactionContext txnContext = new TransactionContext(jobId, transactionProvider);
         synchronized (this) {
-            ITransactionContextRepository.put(jobId, txnContext);
+            transactionContextRepository.put(jobId, txnContext);
         }
         return txnContext;
     }
@@ -80,13 +86,13 @@
     @Override
     public ITransactionContext getTransactionContext(JobId jobId) throws ACIDException {
         setMaxJobId(jobId.getId());
-        synchronized (ITransactionContextRepository) {
+        synchronized (transactionContextRepository) {
 
-            ITransactionContext context = ITransactionContextRepository.get(jobId);
+            ITransactionContext context = transactionContextRepository.get(jobId);
             if (context == null) {
-                context = ITransactionContextRepository.get(jobId);
+                context = transactionContextRepository.get(jobId);
                 context = new TransactionContext(jobId, transactionProvider);
-                ITransactionContextRepository.put(jobId, context);
+                transactionContextRepository.put(jobId, context);
             }
             return context;
         }
@@ -107,13 +113,13 @@
             if (PKHashVal != -1) {
                 transactionProvider.getLockManager().unlock(datasetId, PKHashVal, txnContext, true);
                 /*****************************
-                try {
-                    //decrease the transaction reference count on index
-                    txnContext.decreaseActiveTransactionCountOnIndexes();
-                } catch (HyracksDataException e) {
-                    throw new ACIDException("failed to complete index operation", e);
-                }
-                *****************************/
+                 * try {
+                 * //decrease the transaction reference count on index
+                 * txnContext.decreaseActiveTransactionCountOnIndexes();
+                 * } catch (HyracksDataException e) {
+                 * throw new ACIDException("failed to complete index operation", e);
+                 * }
+                 *****************************/
                 return;
             }
 
@@ -131,7 +137,7 @@
             } finally {
                 txnContext.releaseResources();
                 transactionProvider.getLockManager().releaseLocks(txnContext); // release
-                ITransactionContextRepository.remove(txnContext.getJobId());
+                transactionContextRepository.remove(txnContext.getJobId());
                 txnContext.setTxnState(TransactionState.COMMITTED);
             }
         }
@@ -151,12 +157,69 @@
     public TransactionSubsystem getTransactionProvider() {
         return transactionProvider;
     }
-    
+
     public void setMaxJobId(int jobId) {
         maxJobId.set(Math.max(maxJobId.get(), jobId));
     }
-    
+
     public int getMaxJobId() {
         return maxJobId.get();
     }
+
+    @Override
+    public void start() {
+        //no op
+    }
+
+    @Override
+    public void stop(boolean dumpState, OutputStream os) {
+        if (dumpState) {
+            //#. dump TxnContext
+            dumpTxnContext(os);
+
+            try {
+                os.flush();
+            } catch (IOException e) {
+                //ignore
+            }
+        }
+    }
+
+    private void dumpTxnContext(OutputStream os) {
+        JobId jobId;
+        ITransactionContext txnCtx;
+        StringBuilder sb = new StringBuilder();
+
+        try {
+            sb.append("\n>>dump_begin\t>>----- [ConfVars] -----");
+            Set<Map.Entry<JobId, ITransactionContext>> entrySet = transactionContextRepository.entrySet();
+            if (entrySet != null) {
+                for (Map.Entry<JobId, ITransactionContext> entry : entrySet) {
+                    if (entry != null) {
+                        jobId = entry.getKey();
+                        if (jobId != null) {
+                            sb.append("\n" + jobId);
+                        } else {
+                            sb.append("\nJID:null");
+                        }
+
+                        txnCtx = entry.getValue();
+                        if (txnCtx != null) {
+                            sb.append(txnCtx.prettyPrint());
+                        } else {
+                            sb.append("\nTxnCtx:null");
+                        }
+                    }
+                }
+            }
+
+            sb.append("\n>>dump_end\t>>----- [ConfVars] -----\n");
+            os.write(sb.toString().getBytes());
+        } catch (Exception e) {
+            //ignore exception and continue dumping as much as possible.
+            if (IS_DEBUG_MODE) {
+                e.printStackTrace();
+            }
+        }
+    }
 }