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 4f01f37..d3f4042 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 6b5619d..aae532a 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 +15,12 @@
 
 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.Set;
 import java.util.Map.Entry;
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
@@ -2051,14 +2053,178 @@
 
     @Override
     public void start() {
-        // TODO Auto-generated method stub
-
+        //no op
     }
 
     @Override
-    public void stop(boolean dumpState, OutputStream ouputStream) {
-        // TODO Auto-generated method stub
+    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();
+            }
+        }
     }
 }
 
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 dbe76ff..5cf33379 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;
 
 /**
@@ -268,28 +270,42 @@
         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);
@@ -374,4 +390,20 @@
     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/logging/LogManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManager.java
index d1fc1ca..1721f09 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
@@ -808,14 +808,56 @@
 
     @Override
     public void start() {
-        // TODO Auto-generated method stub
-        
+        //no op
     }
 
     @Override
-    public void stop(boolean dumpState, OutputStream ouputStream) {
-        // TODO Auto-generated method stub
-        
+    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/logging/LogManagerProperties.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManagerProperties.java
index 5040fa9..631d9c4 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManagerProperties.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/logging/LogManagerProperties.java
@@ -101,13 +101,13 @@
     }
 
     public String toString() {
-        StringBuilder builder = new StringBuilder();
-        builder.append("log_dir_ : " + logDir + FileUtil.lineSeparator);
-        builder.append("log_file_prefix" + logFilePrefix + FileUtil.lineSeparator);
-        builder.append("log_page_size : " + logPageSize + FileUtil.lineSeparator);
-        builder.append("num_log_pages : " + numLogPages + FileUtil.lineSeparator);
-        builder.append("log_partition_size : " + logPartitionSize + FileUtil.lineSeparator);
-        builder.append("group_commit_wait_period : " + groupCommitWaitPeriod + FileUtil.lineSeparator);
-        return builder.toString();
+        StringBuilder sb = new StringBuilder();
+        sb.append("logDir : " + logDir + FileUtil.lineSeparator);
+        sb.append("logFilePrefix" + logFilePrefix + FileUtil.lineSeparator);
+        sb.append("logPageSize : " + logPageSize + FileUtil.lineSeparator);
+        sb.append("numLogPages : " + numLogPages + FileUtil.lineSeparator);
+        sb.append("logPartitionSize : " + logPartitionSize + FileUtil.lineSeparator);
+        sb.append("groupCommitWaitPeriod : " + groupCommitWaitPeriod + FileUtil.lineSeparator);
+        return sb.toString();
     }
 }
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 f2bd18e..83221c1 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
@@ -786,14 +786,12 @@
 
     @Override
     public void start() {
-        // TODO Auto-generated method stub
-        
+        //no op
     }
 
     @Override
-    public void stop(boolean dumpState, OutputStream ouputStream) {
-        // TODO Auto-generated method stub
-        
+    public void stop(boolean dumpState, OutputStream os) {
+        //no op
     }
 }
 
diff --git a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionManager.java b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionManager.java
index 3f55ac9..a78bd6b 100644
--- a/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionManager.java
+++ b/asterix-transactions/src/main/java/edu/uci/ics/asterix/transaction/management/service/transaction/ITransactionManager.java
@@ -15,13 +15,14 @@
 package edu.uci.ics.asterix.transaction.management.service.transaction;
 
 import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
+import edu.uci.ics.hyracks.api.lifecycle.ILifeCycleComponent;
 
 /**
  * Provides APIs for managing life cycle of a transaction, that is beginning a
  * transaction and aborting/committing the transaction.
  */
 
-public interface ITransactionManager {
+public interface ITransactionManager extends ILifeCycleComponent {
 
     /**
      * A transaction may be in any of the following states ACTIVE: The
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 5b01edf..09b6384 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
@@ -19,7 +19,6 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
-import java.util.concurrent.atomic.AtomicInteger;
 
 import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
 import edu.uci.ics.asterix.transaction.management.opcallbacks.AbstractOperationCallback;
@@ -170,7 +169,7 @@
             closeable.close(this);
         }
     }
-    
+
     @Override
     public int hashCode() {
         return jobId.getId();
@@ -180,4 +179,16 @@
     public boolean equals(Object o) {
         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 b311b9a..eba5574 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
@@ -14,20 +14,26 @@
  */
 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;
 
 import edu.uci.ics.asterix.transaction.management.exception.ACIDException;
 import edu.uci.ics.asterix.transaction.management.service.logging.LogType;
+import edu.uci.ics.hyracks.api.lifecycle.LifeCycleComponentManager;
 
 /**
  * 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 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, TransactionContext> transactionContextRepository = new HashMap<JobId, TransactionContext>();
@@ -35,6 +41,7 @@
 
     public TransactionManager(TransactionSubsystem provider) {
         this.transactionProvider = provider;
+        LifeCycleComponentManager.INSTANCE.register(this);
     }
 
     @Override
@@ -103,13 +110,13 @@
             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;
             }
 
@@ -147,12 +154,69 @@
     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;
+        TransactionContext txnCtx;
+        StringBuilder sb = new StringBuilder();
+
+        try {
+            sb.append("\n>>dump_begin\t>>----- [ConfVars] -----");
+            Set<Map.Entry<JobId, TransactionContext>> entrySet = transactionContextRepository.entrySet();
+            if (entrySet != null) {
+                for (Map.Entry<JobId, TransactionContext> 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();
+            }
+        }
+    }
 }