diff --git a/hyracks/hyracks-control-nc/.classpath b/hyracks/hyracks-control-nc/.classpath
new file mode 100644
index 0000000..2fb3f21
--- /dev/null
+++ b/hyracks/hyracks-control-nc/.classpath
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src/main/java"/>
+	<classpathentry kind="src" path="src/test/java"/>
+	<classpathentry kind="src" path="src/main/resources"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER"/>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>
diff --git a/hyracks/hyracks-control-nc/.project b/hyracks/hyracks-control-nc/.project
new file mode 100644
index 0000000..83d4a09
--- /dev/null
+++ b/hyracks/hyracks-control-nc/.project
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>hyracks-control-nc</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.maven.ide.eclipse.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.maven.ide.eclipse.maven2Nature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/hyracks/hyracks-control-nc/pom.xml b/hyracks/hyracks-control-nc/pom.xml
new file mode 100644
index 0000000..0a59c1f
--- /dev/null
+++ b/hyracks/hyracks-control-nc/pom.xml
@@ -0,0 +1,93 @@
+<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/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>edu.uci.ics.hyracks</groupId>
+  <artifactId>hyracks-control-nc</artifactId>
+  <version>0.1.0</version>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.0.2</version>
+        <configuration>
+          <source>1.6</source>
+          <target>1.6</target>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <configuration>
+          <forkMode>pertest</forkMode>
+          <argLine>-enableassertions</argLine>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+  	<dependency>
+  		<groupId>org.eclipse.jetty</groupId>
+  		<artifactId>jetty-server</artifactId>
+  		<version>8.0.0.M0</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>junit</groupId>
+  		<artifactId>junit</artifactId>
+  		<version>4.8.1</version>
+  		<type>jar</type>
+  		<scope>test</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>args4j</groupId>
+  		<artifactId>args4j</artifactId>
+  		<version>2.0.12</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.dcache</groupId>
+  		<artifactId>dcache-client</artifactId>
+  		<version>0.0.1</version>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>org.apache.wicket</groupId>
+  		<artifactId>wicket</artifactId>
+  		<version>1.4.7</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>jol</groupId>
+  		<artifactId>jol</artifactId>
+  		<version>1.0.0</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-api</artifactId>
+  		<version>0.1.0</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  	<dependency>
+  		<groupId>edu.uci.ics.hyracks</groupId>
+  		<artifactId>hyracks-control-common</artifactId>
+  		<version>0.1.0</version>
+  		<type>jar</type>
+  		<scope>compile</scope>
+  	</dependency>
+  </dependencies>
+  <reporting>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>findbugs-maven-plugin</artifactId>
+        <version>2.0.1</version>
+      </plugin>
+    </plugins>
+  </reporting>
+</project>
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Joblet.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Joblet.java
new file mode 100644
index 0000000..eb7ac72
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Joblet.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.Executor;
+
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.OperatorDescriptorId;
+import edu.uci.ics.hyracks.api.job.IOperatorEnvironment;
+import edu.uci.ics.hyracks.api.job.statistics.StageletStatistics;
+
+public class Joblet {
+    private static final long serialVersionUID = 1L;
+
+    private final NodeControllerService nodeController;
+
+    private final UUID jobId;
+
+    private final Map<UUID, Stagelet> stageletMap;
+
+    private final Map<OperatorDescriptorId, Map<Integer, IOperatorEnvironment>> envMap;
+
+    public Joblet(NodeControllerService nodeController, UUID jobId) throws Exception {
+        this.nodeController = nodeController;
+        this.jobId = jobId;
+        stageletMap = new HashMap<UUID, Stagelet>();
+        envMap = new HashMap<OperatorDescriptorId, Map<Integer, IOperatorEnvironment>>();
+    }
+
+    public UUID getJobId() {
+        return jobId;
+    }
+
+    public IOperatorEnvironment getEnvironment(IOperatorDescriptor hod, int partition) {
+        if (!envMap.containsKey(hod.getOperatorId())) {
+            envMap.put(hod.getOperatorId(), new HashMap<Integer, IOperatorEnvironment>());
+        }
+        Map<Integer, IOperatorEnvironment> opEnvMap = envMap.get(hod.getOperatorId());
+        if (!opEnvMap.containsKey(partition)) {
+            opEnvMap.put(partition, new OperatorEnvironmentImpl());
+        }
+        return opEnvMap.get(partition);
+    }
+
+    private static final class OperatorEnvironmentImpl implements IOperatorEnvironment {
+        private final Map<String, Object> map;
+
+        public OperatorEnvironmentImpl() {
+            map = new HashMap<String, Object>();
+        }
+
+        @Override
+        public Object get(String name) {
+            return map.get(name);
+        }
+
+        @Override
+        public void set(String name, Object value) {
+            map.put(name, value);
+        }
+    }
+
+    public void setStagelet(UUID stageId, Stagelet stagelet) {
+        stageletMap.put(stageId, stagelet);
+    }
+
+    public Stagelet getStagelet(UUID stageId) throws Exception {
+        return stageletMap.get(stageId);
+    }
+
+    public Executor getExecutor() {
+        return nodeController.getExecutor();
+    }
+
+    public synchronized void notifyStageletComplete(UUID stageId, int attempt, StageletStatistics stats) throws Exception {
+        stageletMap.remove(stageId);
+        nodeController.notifyStageComplete(jobId, stageId, attempt, stats);
+    }
+
+    public void notifyStageletFailed(UUID stageId, int attempt) throws Exception {
+        stageletMap.remove(stageId);
+        nodeController.notifyStageFailed(jobId, stageId, attempt);        
+    }
+
+    public NodeControllerService getNodeController() {
+        return nodeController;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NCDriver.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NCDriver.java
new file mode 100644
index 0000000..af1f3dc
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NCDriver.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc;
+
+import org.kohsuke.args4j.CmdLineParser;
+
+import edu.uci.ics.dcache.client.DCacheClient;
+import edu.uci.ics.dcache.client.DCacheClientConfig;
+import edu.uci.ics.hyracks.control.common.api.NCConfig;
+
+public class NCDriver {
+    public static void main(String args[]) throws Exception {
+        NCConfig ncConfig = new NCConfig();
+        CmdLineParser cp = new CmdLineParser(ncConfig);
+        try {
+            cp.parseArgument(args);
+        } catch (Exception e) {
+            System.err.println(e.getMessage());
+            cp.printUsage(System.err);
+            return;
+        }
+
+        DCacheClientConfig dccConfig = new DCacheClientConfig();
+        dccConfig.servers = ncConfig.dcacheClientServers;
+        dccConfig.serverLocal = ncConfig.dcacheClientServerLocal;
+        dccConfig.path = ncConfig.dcacheClientPath;
+
+        DCacheClient.get().init(dccConfig);
+
+        final NodeControllerService nService = new NodeControllerService(ncConfig);
+        nService.start();
+        Runtime.getRuntime().addShutdownHook(new Thread() {
+            @Override
+            public void run() {
+                try {
+                    nService.stop();
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+        });
+        while (true) {
+            Thread.sleep(10000);
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NodeControllerService.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NodeControllerService.java
new file mode 100644
index 0000000..14c5339
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/NodeControllerService.java
@@ -0,0 +1,460 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc;
+
+import java.net.InetAddress;
+import java.nio.ByteBuffer;
+import java.rmi.registry.LocateRegistry;
+import java.rmi.registry.Registry;
+import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.UUID;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import edu.uci.ics.hyracks.api.comm.IConnectionDemultiplexer;
+import edu.uci.ics.hyracks.api.comm.IFrameReader;
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.context.IHyracksContext;
+import edu.uci.ics.hyracks.api.dataflow.ActivityNodeId;
+import edu.uci.ics.hyracks.api.dataflow.Direction;
+import edu.uci.ics.hyracks.api.dataflow.IActivityNode;
+import edu.uci.ics.hyracks.api.dataflow.IConnectorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.IEndpointDataWriterFactory;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.OperatorDescriptorId;
+import edu.uci.ics.hyracks.api.dataflow.OperatorInstanceId;
+import edu.uci.ics.hyracks.api.dataflow.PortInstanceId;
+import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.api.job.JobFlag;
+import edu.uci.ics.hyracks.api.job.JobSpecification;
+import edu.uci.ics.hyracks.api.job.statistics.StageletStatistics;
+import edu.uci.ics.hyracks.control.common.AbstractRemoteService;
+import edu.uci.ics.hyracks.control.common.NodeCapability;
+import edu.uci.ics.hyracks.control.common.NodeParameters;
+import edu.uci.ics.hyracks.control.common.api.IClusterController;
+import edu.uci.ics.hyracks.control.common.api.INodeController;
+import edu.uci.ics.hyracks.control.common.api.NCConfig;
+import edu.uci.ics.hyracks.control.common.comm.Endpoint;
+import edu.uci.ics.hyracks.control.common.job.JobPlan;
+import edu.uci.ics.hyracks.control.nc.comm.ConnectionManager;
+import edu.uci.ics.hyracks.control.nc.comm.DemuxDataReceiveListenerFactory;
+import edu.uci.ics.hyracks.control.nc.runtime.HyracksContext;
+import edu.uci.ics.hyracks.control.nc.runtime.OperatorRunnable;
+
+public class NodeControllerService extends AbstractRemoteService implements INodeController {
+    private static final long serialVersionUID = 1L;
+
+    private NCConfig ncConfig;
+
+    private final String id;
+
+    private final IHyracksContext ctx;
+
+    private final NodeCapability nodeCapability;
+
+    private final ConnectionManager connectionManager;
+
+    private final Timer timer;
+
+    private IClusterController ccs;
+
+    private Map<UUID, Joblet> jobletMap;
+
+    private Executor executor;
+
+    private NodeParameters nodeParameters;
+
+    public NodeControllerService(NCConfig ncConfig) throws Exception {
+        this.ncConfig = ncConfig;
+        id = ncConfig.nodeId;
+        this.ctx = new HyracksContext(ncConfig.frameSize);
+        if (id == null) {
+            throw new Exception("id not set");
+        }
+        nodeCapability = computeNodeCapability();
+        connectionManager = new ConnectionManager(ctx, getIpAddress(ncConfig));
+        jobletMap = new HashMap<UUID, Joblet>();
+        executor = Executors.newCachedThreadPool();
+        timer = new Timer(true);
+    }
+
+    private static Logger LOGGER = Logger.getLogger(NodeControllerService.class.getName());
+
+    @Override
+    public void start() throws Exception {
+        LOGGER.log(Level.INFO, "Starting NodeControllerService");
+        connectionManager.start();
+        Registry registry = LocateRegistry.getRegistry(ncConfig.ccHost, ncConfig.ccPort);
+        IClusterController cc = (IClusterController) registry.lookup(IClusterController.class.getName());
+        this.nodeParameters = cc.registerNode(this);
+
+        // Schedule heartbeat generator.
+        timer.schedule(new HeartbeatTask(cc), 0, nodeParameters.getHeartbeatPeriod());
+
+        LOGGER.log(Level.INFO, "Started NodeControllerService");
+    }
+
+    @Override
+    public void stop() throws Exception {
+        LOGGER.log(Level.INFO, "Stopping NodeControllerService");
+        connectionManager.stop();
+        LOGGER.log(Level.INFO, "Stopped NodeControllerService");
+    }
+
+    @Override
+    public String getId() {
+        return id;
+    }
+
+    @Override
+    public NodeCapability getNodeCapability() throws Exception {
+        return nodeCapability;
+    }
+
+    public ConnectionManager getConnectionManager() {
+        return connectionManager;
+    }
+
+    private static NodeCapability computeNodeCapability() {
+        NodeCapability nc = new NodeCapability();
+        nc.setCPUCount(Runtime.getRuntime().availableProcessors());
+        return nc;
+    }
+
+    private static InetAddress getIpAddress(NCConfig ncConfig) throws Exception {
+        String ipaddrStr = ncConfig.dataIPAddress;
+        ipaddrStr = ipaddrStr.trim();
+        Pattern pattern = Pattern.compile("(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})");
+        Matcher m = pattern.matcher(ipaddrStr);
+        if (!m.matches()) {
+            throw new Exception(MessageFormat.format(
+                    "Connection Manager IP Address String %s does is not a valid IP Address.", ipaddrStr));
+        }
+        byte[] ipBytes = new byte[4];
+        ipBytes[0] = (byte) Integer.parseInt(m.group(1));
+        ipBytes[1] = (byte) Integer.parseInt(m.group(2));
+        ipBytes[2] = (byte) Integer.parseInt(m.group(3));
+        ipBytes[3] = (byte) Integer.parseInt(m.group(4));
+        return InetAddress.getByAddress(ipBytes);
+    }
+
+    @Override
+    public Map<PortInstanceId, Endpoint> initializeJobletPhase1(UUID jobId, final JobPlan plan, UUID stageId,
+            int attempt, Map<ActivityNodeId, Set<Integer>> tasks, Map<OperatorDescriptorId, Set<Integer>> opPartitions)
+            throws Exception {
+        try {
+            LOGGER.log(Level.INFO, String.valueOf(jobId) + "[" + id + ":" + stageId + "]: Initializing Joblet Phase 1");
+
+            IRecordDescriptorProvider rdp = new IRecordDescriptorProvider() {
+                @Override
+                public RecordDescriptor getOutputRecordDescriptor(OperatorDescriptorId opId, int outputIndex) {
+                    return plan.getJobSpecification().getOperatorOutputRecordDescriptor(opId, outputIndex);
+                }
+
+                @Override
+                public RecordDescriptor getInputRecordDescriptor(OperatorDescriptorId opId, int inputIndex) {
+                    return plan.getJobSpecification().getOperatorInputRecordDescriptor(opId, inputIndex);
+                }
+            };
+
+            final Joblet joblet = getLocalJoblet(jobId);
+
+            Stagelet stagelet = new Stagelet(joblet, stageId, attempt, id);
+            joblet.setStagelet(stageId, stagelet);
+
+            final Map<PortInstanceId, Endpoint> portMap = new HashMap<PortInstanceId, Endpoint>();
+            Map<OperatorInstanceId, OperatorRunnable> honMap = stagelet.getOperatorMap();
+
+            List<Endpoint> endpointList = new ArrayList<Endpoint>();
+
+            for (ActivityNodeId hanId : tasks.keySet()) {
+                IActivityNode han = plan.getActivityNodeMap().get(hanId);
+                if (LOGGER.isLoggable(Level.FINEST)) {
+                    LOGGER.finest("Initializing " + hanId + " -> " + han);
+                }
+                IOperatorDescriptor op = han.getOwner();
+                List<IConnectorDescriptor> inputs = plan.getTaskInputs(hanId);
+                for (int i : tasks.get(hanId)) {
+                    IOperatorNodePushable hon = han.createPushRuntime(ctx, joblet.getEnvironment(op, i), rdp, i,
+                            opPartitions.get(op.getOperatorId()).size());
+                    OperatorRunnable or = new OperatorRunnable(ctx, hon);
+                    stagelet.setOperator(op.getOperatorId(), i, or);
+                    if (inputs != null) {
+                        for (int j = 0; j < inputs.size(); ++j) {
+                            if (j >= 1) {
+                                throw new IllegalStateException();
+                            }
+                            IConnectorDescriptor conn = inputs.get(j);
+                            OperatorDescriptorId producerOpId = plan.getJobSpecification().getProducer(conn)
+                                    .getOperatorId();
+                            OperatorDescriptorId consumerOpId = plan.getJobSpecification().getConsumer(conn)
+                                    .getOperatorId();
+                            Endpoint endpoint = new Endpoint(connectionManager.getNetworkAddress(), i);
+                            endpointList.add(endpoint);
+                            DemuxDataReceiveListenerFactory drlf = new DemuxDataReceiveListenerFactory(ctx, jobId,
+                                    stageId);
+                            connectionManager.acceptConnection(endpoint.getEndpointId(), drlf);
+                            PortInstanceId piId = new PortInstanceId(op.getOperatorId(), Direction.INPUT, plan
+                                    .getTaskInputMap().get(hanId).get(j), i);
+                            if (LOGGER.isLoggable(Level.FINEST)) {
+                                LOGGER.finest("Created endpoint " + piId + " -> " + endpoint);
+                            }
+                            portMap.put(piId, endpoint);
+                            IFrameReader reader = createReader(conn, drlf, i, plan, stagelet,
+                                    opPartitions.get(producerOpId).size(), opPartitions.get(consumerOpId).size());
+                            or.setFrameReader(reader);
+                        }
+                    }
+                    honMap.put(new OperatorInstanceId(op.getOperatorId(), i), or);
+                }
+            }
+
+            stagelet.setEndpointList(endpointList);
+
+            return portMap;
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw e;
+        }
+    }
+
+    private IFrameReader createReader(final IConnectorDescriptor conn, IConnectionDemultiplexer demux,
+            final int receiverIndex, JobPlan plan, final Stagelet stagelet, int nProducerCount, int nConsumerCount)
+            throws HyracksDataException {
+        final IFrameReader reader = conn.createReceiveSideReader(ctx, plan.getJobSpecification()
+                .getConnectorRecordDescriptor(conn), demux, receiverIndex, nProducerCount,
+                nConsumerCount);
+
+        return plan.getJobFlags().contains(JobFlag.COLLECT_FRAME_COUNTS) ? new IFrameReader() {
+            private int frameCount;
+
+            @Override
+            public void open() throws HyracksDataException {
+                frameCount = 0;
+                reader.open();
+            }
+
+            @Override
+            public boolean nextFrame(ByteBuffer buffer) throws HyracksDataException {
+                boolean status = reader.nextFrame(buffer);
+                if (status) {
+                    ++frameCount;
+                }
+                return status;
+            }
+
+            @Override
+            public void close() throws HyracksDataException {
+                reader.close();
+                stagelet.getStatistics()
+                        .getStatisticsMap()
+                        .put("framecount." + conn.getConnectorId().getId() + ".receiver." + receiverIndex,
+                                String.valueOf(frameCount));
+            }
+        } : reader;
+    }
+
+    @Override
+    public void initializeJobletPhase2(UUID jobId, final JobPlan plan, UUID stageId,
+            Map<ActivityNodeId, Set<Integer>> tasks, Map<OperatorDescriptorId, Set<Integer>> opPartitions,
+            final Map<PortInstanceId, Endpoint> globalPortMap) throws Exception {
+        try {
+            LOGGER.log(Level.INFO, String.valueOf(jobId) + "[" + id + ":" + stageId + "]: Initializing Joblet Phase 2");
+            final Joblet ji = getLocalJoblet(jobId);
+            Stagelet si = (Stagelet) ji.getStagelet(stageId);
+            final Map<OperatorInstanceId, OperatorRunnable> honMap = si.getOperatorMap();
+
+            final Stagelet stagelet = (Stagelet) ji.getStagelet(stageId);
+
+            final JobSpecification spec = plan.getJobSpecification();
+
+            for (ActivityNodeId hanId : tasks.keySet()) {
+                IActivityNode han = plan.getActivityNodeMap().get(hanId);
+                IOperatorDescriptor op = han.getOwner();
+                List<IConnectorDescriptor> outputs = plan.getTaskOutputs(hanId);
+                for (int i : tasks.get(hanId)) {
+                    OperatorRunnable or = honMap.get(new OperatorInstanceId(op.getOperatorId(), i));
+                    if (outputs != null) {
+                        for (int j = 0; j < outputs.size(); ++j) {
+                            final IConnectorDescriptor conn = outputs.get(j);
+                            OperatorDescriptorId producerOpId = plan.getJobSpecification().getProducer(conn)
+                                    .getOperatorId();
+                            OperatorDescriptorId consumerOpId = plan.getJobSpecification().getConsumer(conn)
+                                    .getOperatorId();
+                            final int senderIndex = i;
+                            IEndpointDataWriterFactory edwFactory = new IEndpointDataWriterFactory() {
+                                @Override
+                                public IFrameWriter createFrameWriter(int index) throws HyracksDataException {
+                                    PortInstanceId piId = new PortInstanceId(spec.getConsumer(conn).getOperatorId(),
+                                            Direction.INPUT, spec.getConsumerInputIndex(conn), index);
+                                    Endpoint ep = globalPortMap.get(piId);
+                                    if (ep == null) {
+                                        LOGGER.info("Got null Endpoint for " + piId);
+                                        throw new NullPointerException();
+                                    }
+                                    if (LOGGER.isLoggable(Level.FINEST)) {
+                                        LOGGER.finest("Probed endpoint " + piId + " -> " + ep);
+                                    }
+                                    return createWriter(connectionManager.connect(ep.getNetworkAddress(),
+                                            ep.getEndpointId(), senderIndex), plan, conn, senderIndex, index, stagelet);
+                                }
+                            };
+                            or.setFrameWriter(j, conn.createSendSideWriter(ctx, plan.getJobSpecification()
+                                    .getConnectorRecordDescriptor(conn), edwFactory, i,
+                                    opPartitions.get(producerOpId).size(), opPartitions.get(consumerOpId).size()), spec
+                                    .getConnectorRecordDescriptor(conn));
+                        }
+                    }
+                    stagelet.installRunnable(new OperatorInstanceId(op.getOperatorId(), i));
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw e;
+        }
+    }
+
+    private IFrameWriter createWriter(final IFrameWriter writer, JobPlan plan, final IConnectorDescriptor conn,
+            final int senderIndex, final int receiverIndex, final Stagelet stagelet) throws HyracksDataException {
+        return plan.getJobFlags().contains(JobFlag.COLLECT_FRAME_COUNTS) ? new IFrameWriter() {
+            private int frameCount;
+
+            @Override
+            public void open() throws HyracksDataException {
+                frameCount = 0;
+                writer.open();
+            }
+
+            @Override
+            public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+                ++frameCount;
+                writer.nextFrame(buffer);
+            }
+
+            @Override
+            public void close() throws HyracksDataException {
+                writer.close();
+                stagelet.getStatistics()
+                        .getStatisticsMap()
+                        .put("framecount." + conn.getConnectorId().getId() + ".sender." + senderIndex + "."
+                                + receiverIndex, String.valueOf(frameCount));
+            }
+        } : writer;
+    }
+
+    @Override
+    public void commitJobletInitialization(UUID jobId, UUID stageId) throws Exception {
+        final Joblet ji = getLocalJoblet(jobId);
+        Stagelet si = (Stagelet) ji.getStagelet(stageId);
+        for (Endpoint e : si.getEndpointList()) {
+            connectionManager.unacceptConnection(e.getEndpointId());
+        }
+        si.setEndpointList(null);
+    }
+
+    private synchronized Joblet getLocalJoblet(UUID jobId) throws Exception {
+        Joblet ji = jobletMap.get(jobId);
+        if (ji == null) {
+            ji = new Joblet(this, jobId);
+            jobletMap.put(jobId, ji);
+        }
+        return ji;
+    }
+
+    public Executor getExecutor() {
+        return executor;
+    }
+
+    @Override
+    public synchronized void cleanUpJob(UUID jobId) throws Exception {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("Cleaning up after job: " + jobId);
+        }
+        jobletMap.remove(jobId);
+        connectionManager.dumpStats();
+    }
+
+    @Override
+    public void startStage(UUID jobId, UUID stageId) throws Exception {
+        Joblet ji = jobletMap.get(jobId);
+        if (ji != null) {
+            Stagelet s = ji.getStagelet(stageId);
+            if (s != null) {
+                s.start();
+            }
+        }
+    }
+
+    public void notifyStageComplete(UUID jobId, UUID stageId, int attempt, StageletStatistics stats) throws Exception {
+        ccs.notifyStageletComplete(jobId, stageId, attempt, id, stats);
+    }
+
+    public void notifyStageFailed(UUID jobId, UUID stageId, int attempt) throws Exception {
+        ccs.notifyStageletFailure(jobId, stageId, attempt, id);
+    }
+
+    @Override
+    public void notifyRegistration(IClusterController ccs) throws Exception {
+        this.ccs = ccs;
+    }
+
+    @Override
+    public NCConfig getConfiguration() throws Exception {
+        return ncConfig;
+    }
+
+    private class HeartbeatTask extends TimerTask {
+        private IClusterController cc;
+
+        public HeartbeatTask(IClusterController cc) {
+            this.cc = cc;
+        }
+
+        @Override
+        public void run() {
+            try {
+                cc.nodeHeartbeat(id);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    @Override
+    public synchronized void abortJoblet(UUID jobId, UUID stageId) throws Exception {
+        Joblet ji = jobletMap.get(jobId);
+        if (ji != null) {
+            Stagelet stagelet = ji.getStagelet(stageId);
+            if (stagelet != null) {
+                stagelet.abort();
+                connectionManager.abortConnections(jobId, stageId);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Stagelet.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Stagelet.java
new file mode 100644
index 0000000..696ce29
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/Stagelet.java
@@ -0,0 +1,170 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc;
+
+import java.rmi.RemoteException;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.dataflow.OperatorDescriptorId;
+import edu.uci.ics.hyracks.api.dataflow.OperatorInstanceId;
+import edu.uci.ics.hyracks.api.job.statistics.StageletStatistics;
+import edu.uci.ics.hyracks.control.common.comm.Endpoint;
+import edu.uci.ics.hyracks.control.nc.runtime.OperatorRunnable;
+
+public class Stagelet {
+    private static final long serialVersionUID = 1L;
+
+    private static final Logger LOGGER = Logger.getLogger(Stagelet.class.getName());
+
+    private final Joblet joblet;
+
+    private final UUID stageId;
+
+    private final int attempt;
+
+    private final Map<OperatorInstanceId, OperatorRunnable> honMap;
+
+    private List<Endpoint> endpointList;
+
+    private boolean started;
+
+    private volatile boolean abort;
+
+    private final Set<OperatorInstanceId> pendingOperators;
+
+    private final StageletStatistics stats;
+
+    public Stagelet(Joblet joblet, UUID stageId, int attempt, String nodeId) throws RemoteException {
+        this.joblet = joblet;
+        this.stageId = stageId;
+        this.attempt = attempt;
+        pendingOperators = new HashSet<OperatorInstanceId>();
+        started = false;
+        honMap = new HashMap<OperatorInstanceId, OperatorRunnable>();
+        stats = new StageletStatistics();
+        stats.setNodeId(nodeId);
+    }
+
+    public void setOperator(OperatorDescriptorId odId, int partition, OperatorRunnable hon) {
+        honMap.put(new OperatorInstanceId(odId, partition), hon);
+    }
+
+    public Map<OperatorInstanceId, OperatorRunnable> getOperatorMap() {
+        return honMap;
+    }
+
+    public void setEndpointList(List<Endpoint> endpointList) {
+        this.endpointList = endpointList;
+    }
+
+    public List<Endpoint> getEndpointList() {
+        return endpointList;
+    }
+
+    public synchronized void start() throws Exception {
+        if (started) {
+            throw new Exception("Joblet already started");
+        }
+        started = true;
+        stats.setStartTime(new Date());
+        notifyAll();
+    }
+
+    public synchronized void abort() {
+        this.abort = true;
+        for (OperatorRunnable r : honMap.values()) {
+            r.abort();
+        }
+    }
+
+    public void installRunnable(final OperatorInstanceId opIId) {
+        pendingOperators.add(opIId);
+        final OperatorRunnable hon = honMap.get(opIId);
+        joblet.getExecutor().execute(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    waitUntilStarted();
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                    return;
+                }
+                if (abort) {
+                    return;
+                }
+                try {
+                    LOGGER.log(Level.INFO, joblet.getJobId() + ":" + stageId + ":" + opIId.getOperatorId() + ":"
+                            + opIId.getPartition() + ": STARTING");
+                } catch (Exception e) {
+                    e.printStackTrace();
+                    // notifyOperatorFailure(opIId);
+                }
+                try {
+                    hon.run();
+                    notifyOperatorCompletion(opIId);
+                } catch (Exception e) {
+                    e.printStackTrace();
+                    // notifyOperatorFailure(opIId);
+                }
+                try {
+                    LOGGER.log(Level.INFO, joblet.getJobId() + ":" + stageId + ":" + opIId.getOperatorId() + ":"
+                            + opIId.getPartition() + ": TERMINATED");
+                } catch (Exception e) {
+                    e.printStackTrace();
+                    // notifyOperatorFailure(opIId);
+                }
+            }
+        });
+    }
+
+    protected synchronized void notifyOperatorCompletion(OperatorInstanceId opIId) {
+        pendingOperators.remove(opIId);
+        if (pendingOperators.isEmpty()) {
+            stats.setEndTime(new Date());
+            try {
+                joblet.notifyStageletComplete(stageId, attempt, stats);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    protected synchronized void notifyOperatorFailure(OperatorInstanceId opIId) {
+        abort();
+        try {
+            joblet.notifyStageletFailed(stageId, attempt);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    private synchronized void waitUntilStarted() throws InterruptedException {
+        while (!started && !abort) {
+            wait();
+        }
+    }
+
+    public StageletStatistics getStatistics() {
+        return stats;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/comm/ConnectionEntry.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/comm/ConnectionEntry.java
new file mode 100644
index 0000000..20d41d6
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/comm/ConnectionEntry.java
@@ -0,0 +1,190 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc.comm;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.SocketChannel;
+import java.util.UUID;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.comm.IConnectionEntry;
+import edu.uci.ics.hyracks.api.comm.IDataReceiveListener;
+import edu.uci.ics.hyracks.api.context.IHyracksContext;
+
+public class ConnectionEntry implements IConnectionEntry {
+    private static final Logger LOGGER = Logger.getLogger(ConnectionEntry.class.getName());
+
+    private SocketChannel socketChannel;
+
+    private final ByteBuffer readBuffer;
+
+    private final ByteBuffer writeBuffer;
+
+    private IDataReceiveListener recvListener;
+
+    private Object attachment;
+
+    private final SelectionKey key;
+
+    private UUID jobId;
+
+    private UUID stageId;
+
+    private boolean aborted;
+
+    public ConnectionEntry(IHyracksContext ctx, SocketChannel socketChannel, SelectionKey key) {
+        this.socketChannel = socketChannel;
+        readBuffer = ctx.getResourceManager().allocateFrame();
+        readBuffer.clear();
+        writeBuffer = ctx.getResourceManager().allocateFrame();
+        writeBuffer.clear();
+        this.key = key;
+    }
+
+    public SocketChannel getSocketChannel() {
+        return socketChannel;
+    }
+
+    public boolean dispatch(SelectionKey key) throws IOException {
+        if (aborted) {
+            recvListener.dataReceived(this);
+        } else {
+            if (key.isReadable()) {
+                if (LOGGER.isLoggable(Level.FINER)) {
+                    LOGGER.finer("Before read: " + readBuffer.position() + " " + readBuffer.limit());
+                }
+                int bytesRead = socketChannel.read(readBuffer);
+                if (bytesRead < 0) {
+                    recvListener.eos(this);
+                    return true;
+                }
+                if (LOGGER.isLoggable(Level.FINER)) {
+                    LOGGER.finer("After read: " + readBuffer.position() + " " + readBuffer.limit());
+                }
+                recvListener.dataReceived(this);
+            } else if (key.isWritable()) {
+                synchronized (this) {
+                    writeBuffer.flip();
+                    if (LOGGER.isLoggable(Level.FINER)) {
+                        LOGGER.finer("Before write: " + writeBuffer.position() + " " + writeBuffer.limit());
+                    }
+                    int bytesWritten = socketChannel.write(writeBuffer);
+                    if (bytesWritten < 0) {
+                        return true;
+                    }
+                    if (LOGGER.isLoggable(Level.FINER)) {
+                        LOGGER.finer("After write: " + writeBuffer.position() + " " + writeBuffer.limit());
+                    }
+                    if (writeBuffer.remaining() <= 0) {
+                        int ops = key.interestOps();
+                        key.interestOps(ops & ~SelectionKey.OP_WRITE);
+                    }
+                    writeBuffer.compact();
+                    notifyAll();
+                }
+            } else {
+                LOGGER.warning("Spurious event triggered: " + key.readyOps());
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public ByteBuffer getReadBuffer() {
+        return readBuffer;
+    }
+
+    @Override
+    public synchronized void write(ByteBuffer buffer) {
+        while (buffer.remaining() > 0) {
+            while (writeBuffer.remaining() <= 0) {
+                try {
+                    wait();
+                } catch (InterruptedException e) {
+                }
+            }
+            int oldLimit = buffer.limit();
+            buffer.limit(Math.min(oldLimit, writeBuffer.remaining()));
+            writeBuffer.put(buffer);
+            buffer.limit(oldLimit);
+            int ops = key.interestOps();
+            key.interestOps(ops | SelectionKey.OP_WRITE);
+            key.selector().wakeup();
+        }
+    }
+
+    @Override
+    public void setDataReceiveListener(IDataReceiveListener listener) {
+        this.recvListener = listener;
+    }
+
+    @Override
+    public void attach(Object attachment) {
+        this.attachment = attachment;
+    }
+
+    @Override
+    public Object getAttachment() {
+        return attachment;
+    }
+
+    @Override
+    public void close() {
+        try {
+            socketChannel.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public SelectionKey getSelectionKey() {
+        return key;
+    }
+
+    @Override
+    public UUID getJobId() {
+        return jobId;
+    }
+
+    @Override
+    public void setJobId(UUID jobId) {
+        this.jobId = jobId;
+    }
+
+    @Override
+    public UUID getStageId() {
+        return stageId;
+    }
+
+    @Override
+    public void setStageId(UUID stageId) {
+        this.stageId = stageId;
+    }
+
+    @Override
+    public void abort() {
+        aborted = true;
+    }
+
+    @Override
+    public boolean aborted() {
+        return aborted;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/comm/ConnectionManager.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/comm/ConnectionManager.java
new file mode 100644
index 0000000..452f25e
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/comm/ConnectionManager.java
@@ -0,0 +1,395 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc.comm;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.nio.ByteBuffer;
+import java.nio.channels.AsynchronousCloseException;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.Selector;
+import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.SocketChannel;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.comm.FrameConstants;
+import edu.uci.ics.hyracks.api.comm.FrameHelper;
+import edu.uci.ics.hyracks.api.comm.IConnectionEntry;
+import edu.uci.ics.hyracks.api.comm.IDataReceiveListener;
+import edu.uci.ics.hyracks.api.comm.IDataReceiveListenerFactory;
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.context.IHyracksContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.control.common.comm.NetworkAddress;
+
+public class ConnectionManager {
+    private static final Logger LOGGER = Logger.getLogger(ConnectionManager.class.getName());
+
+    private static final int INITIAL_MESSAGE_LEN = 20;
+
+    private NetworkAddress networkAddress;
+
+    private ServerSocketChannel serverSocketChannel;
+
+    private final IHyracksContext ctx;
+
+    private final Map<UUID, IDataReceiveListenerFactory> pendingConnectionReceivers;
+
+    private final ConnectionListenerThread connectionListenerThread;
+
+    private final DataListenerThread dataListenerThread;
+
+    private final IDataReceiveListener initialDataReceiveListener;
+
+    private final Set<IConnectionEntry> connections;
+
+    private volatile boolean stopped;
+
+    private ByteBuffer emptyFrame;
+
+    public ConnectionManager(IHyracksContext ctx, InetAddress address) throws IOException {
+        this.ctx = ctx;
+        serverSocketChannel = ServerSocketChannel.open();
+        ServerSocket serverSocket = serverSocketChannel.socket();
+        serverSocket.bind(new InetSocketAddress(address, 0));
+
+        networkAddress = new NetworkAddress(serverSocket.getInetAddress(), serverSocket.getLocalPort());
+
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("Connection manager listening on " + serverSocket.getInetAddress() + ":"
+                    + serverSocket.getLocalPort());
+        }
+
+        pendingConnectionReceivers = new HashMap<UUID, IDataReceiveListenerFactory>();
+        dataListenerThread = new DataListenerThread();
+        connectionListenerThread = new ConnectionListenerThread();
+        initialDataReceiveListener = new InitialDataReceiveListener();
+        emptyFrame = ctx.getResourceManager().allocateFrame();
+        emptyFrame.putInt(FrameHelper.getTupleCountOffset(ctx), 0);
+        connections = new HashSet<IConnectionEntry>();
+    }
+
+    public synchronized void dumpStats() {
+        if (LOGGER.isLoggable(Level.INFO)) {
+            LOGGER.info("Number of pendingConnectionReceivers: " + pendingConnectionReceivers.size());
+            LOGGER.info("Number of selectable keys: " + dataListenerThread.selector.keys().size());
+        }
+    }
+
+    public NetworkAddress getNetworkAddress() {
+        return networkAddress;
+    }
+
+    public void start() {
+        stopped = false;
+        connectionListenerThread.start();
+        dataListenerThread.start();
+    }
+
+    public void stop() {
+        try {
+            stopped = true;
+            serverSocketChannel.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public IFrameWriter connect(NetworkAddress address, UUID id, int senderId) throws HyracksDataException {
+        try {
+            SocketChannel channel = SocketChannel
+                    .open(new InetSocketAddress(address.getIpAddress(), address.getPort()));
+            byte[] initialFrame = new byte[INITIAL_MESSAGE_LEN];
+            ByteBuffer buffer = ByteBuffer.wrap(initialFrame);
+            buffer.clear();
+            buffer.putLong(id.getMostSignificantBits());
+            buffer.putLong(id.getLeastSignificantBits());
+            buffer.putInt(senderId);
+            buffer.flip();
+            int bytesWritten = 0;
+            while (bytesWritten < INITIAL_MESSAGE_LEN) {
+                int n = channel.write(buffer);
+                if (n < 0) {
+                    throw new HyracksDataException("Stream closed prematurely");
+                }
+                bytesWritten += n;
+            }
+            if (LOGGER.isLoggable(Level.FINE)) {
+                LOGGER.fine("Send Initial message: " + id + ":" + senderId);
+            }
+            buffer.clear();
+            buffer.limit(FrameConstants.SIZE_LEN);
+            int bytesRead = 0;
+            while (bytesRead < FrameConstants.SIZE_LEN) {
+                int n = channel.read(buffer);
+                if (n < 0) {
+                    throw new HyracksDataException("Stream closed prematurely");
+                }
+                bytesRead += n;
+            }
+            buffer.flip();
+            int frameLen = buffer.getInt();
+            if (frameLen != FrameConstants.SIZE_LEN) {
+                throw new IllegalStateException("Received illegal framelen = " + frameLen);
+            }
+            if (LOGGER.isLoggable(Level.FINE)) {
+                LOGGER.fine("Got Ack message: " + id + ":" + senderId);
+            }
+            return new NetworkFrameWriter(channel);
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    public synchronized void acceptConnection(UUID id, IDataReceiveListenerFactory receiver) {
+        if (LOGGER.isLoggable(Level.FINE)) {
+            LOGGER.info("Connection manager accepting " + id);
+        }
+        pendingConnectionReceivers.put(id, receiver);
+    }
+
+    public synchronized void unacceptConnection(UUID id) {
+        if (LOGGER.isLoggable(Level.FINE)) {
+            LOGGER.info("Connection manager unaccepting " + id);
+        }
+        pendingConnectionReceivers.remove(id);
+    }
+
+    public synchronized void abortConnections(UUID jobId, UUID stageId) {
+        List<IConnectionEntry> abortConnections = new ArrayList<IConnectionEntry>();
+        synchronized (this) {
+            for (IConnectionEntry ce : connections) {
+                if (ce.getJobId().equals(jobId) && ce.getStageId().equals(stageId)) {
+                    abortConnections.add(ce);
+                }
+            }
+        }
+        dataListenerThread.addPendingAbortConnections(abortConnections);
+    }
+
+    private final class NetworkFrameWriter implements IFrameWriter {
+        private SocketChannel channel;
+
+        NetworkFrameWriter(SocketChannel channel) {
+            this.channel = channel;
+        }
+
+        @Override
+        public void close() throws HyracksDataException {
+            try {
+                synchronized (emptyFrame) {
+                    emptyFrame.position(0);
+                    emptyFrame.limit(emptyFrame.capacity());
+                    channel.write(emptyFrame);
+                }
+                channel.close();
+            } catch (IOException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+
+        @Override
+        public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
+            try {
+                if (LOGGER.isLoggable(Level.FINER)) {
+                    int frameLen = buffer.getInt(buffer.position());
+                    LOGGER.finer("ConnectionManager.NetworkFrameWriter: frameLen = " + frameLen);
+                }
+                while (buffer.remaining() > 0) {
+                    channel.write(buffer);
+                }
+            } catch (IOException e) {
+                throw new HyracksDataException(e);
+            }
+        }
+
+        @Override
+        public void open() throws HyracksDataException {
+        }
+    }
+
+    private final class ConnectionListenerThread extends Thread {
+        public ConnectionListenerThread() {
+            super("Hyracks Connection Listener Thread");
+        }
+
+        @Override
+        public void run() {
+            while (!stopped) {
+                try {
+                    SocketChannel sc = serverSocketChannel.accept();
+                    dataListenerThread.addSocketChannel(sc);
+                } catch (AsynchronousCloseException e) {
+                    // do nothing
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+
+    private final class DataListenerThread extends Thread {
+        private Selector selector;
+
+        private List<SocketChannel> pendingNewSockets;
+        private List<IConnectionEntry> pendingAbortConnections;
+
+        public DataListenerThread() {
+            super("Hyracks Data Listener Thread");
+            try {
+                selector = Selector.open();
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+            pendingNewSockets = new ArrayList<SocketChannel>();
+            pendingAbortConnections = new ArrayList<IConnectionEntry>();
+        }
+
+        synchronized void addSocketChannel(SocketChannel sc) throws IOException {
+            pendingNewSockets.add(sc);
+            selector.wakeup();
+        }
+
+        synchronized void addPendingAbortConnections(List<IConnectionEntry> abortConnections) {
+            pendingAbortConnections.addAll(abortConnections);
+            selector.wakeup();
+        }
+
+        @Override
+        public void run() {
+            while (!stopped) {
+                try {
+                    if (LOGGER.isLoggable(Level.FINE)) {
+                        LOGGER.fine("Starting Select");
+                    }
+                    int n = selector.select();
+                    synchronized (this) {
+                        if (!pendingNewSockets.isEmpty()) {
+                            for (SocketChannel sc : pendingNewSockets) {
+                                sc.configureBlocking(false);
+                                SelectionKey scKey = sc.register(selector, SelectionKey.OP_READ);
+                                ConnectionEntry entry = new ConnectionEntry(ctx, sc, scKey);
+                                entry.setDataReceiveListener(initialDataReceiveListener);
+                                scKey.attach(entry);
+                                if (LOGGER.isLoggable(Level.FINE)) {
+                                    LOGGER.fine("Woke up selector");
+                                }
+                            }
+                            pendingNewSockets.clear();
+                        }
+                        if (!pendingAbortConnections.isEmpty()) {
+                            for (IConnectionEntry ce : pendingAbortConnections) {
+                                SelectionKey key = ce.getSelectionKey();
+                                ce.abort();
+                                ((ConnectionEntry) ce).dispatch(key);
+                                key.cancel();
+                                ce.close();
+                                synchronized (ConnectionManager.this) {
+                                    connections.remove(ce);
+                                }
+                            }
+                            pendingAbortConnections.clear();
+                        }
+                        if (LOGGER.isLoggable(Level.FINE)) {
+                            LOGGER.fine("Selector: " + n);
+                        }
+                        if (n > 0) {
+                            for (Iterator<SelectionKey> i = selector.selectedKeys().iterator(); i.hasNext();) {
+                                SelectionKey key = i.next();
+                                i.remove();
+                                ConnectionEntry entry = (ConnectionEntry) key.attachment();
+                                boolean close = false;
+                                try {
+                                    close = entry.dispatch(key);
+                                } catch (IOException e) {
+                                    e.printStackTrace();
+                                    close = true;
+                                }
+                                if (close) {
+                                    key.cancel();
+                                    entry.close();
+                                    synchronized (ConnectionManager.this) {
+                                        connections.remove(entry);
+                                    }
+                                }
+                            }
+                        }
+                    }
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+
+    private class InitialDataReceiveListener implements IDataReceiveListener {
+        @Override
+        public void dataReceived(IConnectionEntry entry) throws IOException {
+            ByteBuffer buffer = entry.getReadBuffer();
+            buffer.flip();
+            IDataReceiveListener newListener = null;
+            if (buffer.remaining() >= INITIAL_MESSAGE_LEN) {
+                long msb = buffer.getLong();
+                long lsb = buffer.getLong();
+                UUID endpointID = new UUID(msb, lsb);
+                int senderId = buffer.getInt();
+                if (LOGGER.isLoggable(Level.FINE)) {
+                    LOGGER.fine("Initial Frame received: " + endpointID + ":" + senderId);
+                }
+                IDataReceiveListenerFactory connectionReceiver;
+                synchronized (ConnectionManager.this) {
+                    connectionReceiver = pendingConnectionReceivers.get(endpointID);
+                    if (connectionReceiver == null) {
+                        entry.close();
+                        return;
+                    }
+                }
+
+                newListener = connectionReceiver.getDataReceiveListener(endpointID, entry, senderId);
+                entry.setDataReceiveListener(newListener);
+                entry.setJobId(connectionReceiver.getJobId());
+                entry.setStageId(connectionReceiver.getStageId());
+                synchronized (ConnectionManager.this) {
+                    connections.add(entry);
+                }
+                byte[] ack = new byte[4];
+                ByteBuffer ackBuffer = ByteBuffer.wrap(ack);
+                ackBuffer.clear();
+                ackBuffer.putInt(FrameConstants.SIZE_LEN);
+                ackBuffer.flip();
+                entry.write(ackBuffer);
+            }
+            buffer.compact();
+            if (newListener != null && buffer.remaining() > 0) {
+                newListener.dataReceived(entry);
+            }
+        }
+
+        @Override
+        public void eos(IConnectionEntry entry) {
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/comm/DemuxDataReceiveListenerFactory.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/comm/DemuxDataReceiveListenerFactory.java
new file mode 100644
index 0000000..6b4c041
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/comm/DemuxDataReceiveListenerFactory.java
@@ -0,0 +1,151 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc.comm;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.SelectionKey;
+import java.util.Arrays;
+import java.util.BitSet;
+import java.util.UUID;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import edu.uci.ics.hyracks.api.comm.IConnectionDemultiplexer;
+import edu.uci.ics.hyracks.api.comm.IConnectionEntry;
+import edu.uci.ics.hyracks.api.comm.IDataReceiveListener;
+import edu.uci.ics.hyracks.api.comm.IDataReceiveListenerFactory;
+import edu.uci.ics.hyracks.api.context.IHyracksContext;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class DemuxDataReceiveListenerFactory implements IDataReceiveListenerFactory, IConnectionDemultiplexer,
+        IDataReceiveListener {
+    private static final Logger LOGGER = Logger.getLogger(DemuxDataReceiveListenerFactory.class.getName());
+
+    private final IHyracksContext ctx;
+    private final BitSet readyBits;
+    private IConnectionEntry senders[];
+    private int openSenderCount;
+    private UUID jobId;
+    private UUID stageId;
+
+    public DemuxDataReceiveListenerFactory(IHyracksContext ctx, UUID jobId, UUID stageId) {
+        this.ctx = ctx;
+        this.jobId = jobId;
+        this.stageId = stageId;
+        readyBits = new BitSet();
+        senders = null;
+        openSenderCount = 0;
+    }
+
+    @Override
+    public IDataReceiveListener getDataReceiveListener(UUID endpointUUID, IConnectionEntry entry, int senderIndex) {
+        entry.attach(senderIndex);
+        addSender(senderIndex, entry);
+        return this;
+    }
+
+    @Override
+    public synchronized void dataReceived(IConnectionEntry entry) throws IOException {
+        int senderIndex = (Integer) entry.getAttachment();
+        ByteBuffer buffer = entry.getReadBuffer();
+        buffer.flip();
+        int dataLen = buffer.remaining();
+        if (dataLen >= ctx.getFrameSize() || entry.aborted()) {
+            if (LOGGER.isLoggable(Level.FINEST)) {
+                LOGGER.finest("NonDeterministicDataReceiveListener: frame received: sender = " + senderIndex);
+            }
+            SelectionKey key = entry.getSelectionKey();
+            if (key.isValid()) {
+                int ops = key.interestOps();
+                key.interestOps(ops & ~SelectionKey.OP_READ);
+            }
+            readyBits.set(senderIndex);
+            notifyAll();
+            return;
+        }
+        buffer.compact();
+    }
+
+    @Override
+    public void eos(IConnectionEntry entry) {
+    }
+
+    private synchronized void addSender(int senderIndex, IConnectionEntry entry) {
+        readyBits.clear(senderIndex);
+        if (senders == null) {
+            senders = new IConnectionEntry[senderIndex + 1];
+        } else if (senders.length <= senderIndex) {
+            senders = Arrays.copyOf(senders, senderIndex + 1);
+        }
+        senders[senderIndex] = entry;
+        ++openSenderCount;
+    }
+
+    @Override
+    public synchronized IConnectionEntry findNextReadyEntry(int lastReadSender) {
+        while (openSenderCount > 0 && readyBits.isEmpty()) {
+            try {
+                wait();
+            } catch (InterruptedException e) {
+            }
+        }
+        lastReadSender = readyBits.nextSetBit(lastReadSender);
+        if (lastReadSender < 0) {
+            lastReadSender = readyBits.nextSetBit(0);
+        }
+        return senders[lastReadSender];
+    }
+
+    @Override
+    public synchronized void unreadyEntry(int index) {
+        readyBits.clear(index);
+        IConnectionEntry entry = senders[index];
+        SelectionKey key = entry.getSelectionKey();
+        if (key.isValid()) {
+            int ops = key.interestOps();
+            key.interestOps(ops | SelectionKey.OP_READ);
+            key.selector().wakeup();
+        }
+    }
+
+    @Override
+    public synchronized int closeEntry(int index) throws HyracksDataException {
+        IConnectionEntry entry = senders[index];
+        SelectionKey key = entry.getSelectionKey();
+        key.cancel();
+        try {
+            entry.close();
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+        return --openSenderCount;
+    }
+
+    @Override
+    public synchronized int getSenderCount() {
+        return senders.length;
+    }
+
+    @Override
+    public UUID getJobId() {
+        return jobId;
+    }
+
+    @Override
+    public UUID getStageId() {
+        return stageId;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/runtime/HyracksContext.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/runtime/HyracksContext.java
new file mode 100644
index 0000000..f61ff8b
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/runtime/HyracksContext.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc.runtime;
+
+import edu.uci.ics.hyracks.api.context.IHyracksContext;
+import edu.uci.ics.hyracks.api.resources.IResourceManager;
+
+public class HyracksContext implements IHyracksContext {
+    private final IResourceManager resourceManager;
+    private final int frameSize;
+
+    public HyracksContext(int frameSize) {
+        resourceManager = new ResourceManager(this);
+        this.frameSize = frameSize;
+    }
+
+    @Override
+    public IResourceManager getResourceManager() {
+        return resourceManager;
+    }
+
+    @Override
+    public int getFrameSize() {
+        return frameSize;
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/runtime/OperatorRunnable.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/runtime/OperatorRunnable.java
new file mode 100644
index 0000000..39d98b1
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/runtime/OperatorRunnable.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc.runtime;
+
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.comm.IFrameReader;
+import edu.uci.ics.hyracks.api.comm.IFrameWriter;
+import edu.uci.ics.hyracks.api.context.IHyracksContext;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable;
+import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
+
+public class OperatorRunnable implements Runnable {
+    private IOperatorNodePushable opNode;
+    private IFrameReader reader;
+    private ByteBuffer buffer;
+    private volatile boolean abort;
+
+    public OperatorRunnable(IHyracksContext ctx, IOperatorNodePushable opNode) {
+        this.opNode = opNode;
+        buffer = ctx.getResourceManager().allocateFrame();
+    }
+
+    public void setFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) {
+        opNode.setFrameWriter(index, writer, recordDesc);
+    }
+
+    public void setFrameReader(IFrameReader reader) {
+        this.reader = reader;
+    }
+
+    public void abort() {
+        abort = true;
+    }
+
+    @Override
+    public void run() {
+        try {
+            opNode.open();
+            if (reader != null) {
+                reader.open();
+                while (reader.nextFrame(buffer)) {
+                    if (abort) {
+                        break;
+                    }
+                    buffer.flip();
+                    opNode.nextFrame(buffer);
+                    buffer.compact();
+                }
+                reader.close();
+            }
+            opNode.close();
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/runtime/ResourceManager.java b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/runtime/ResourceManager.java
new file mode 100644
index 0000000..72202e3
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/runtime/ResourceManager.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2009-2010 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.hyracks.control.nc.runtime;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import edu.uci.ics.hyracks.api.context.IHyracksContext;
+import edu.uci.ics.hyracks.api.resources.IResourceManager;
+
+public final class ResourceManager implements IResourceManager {
+    private final IHyracksContext ctx;
+
+    public ResourceManager(IHyracksContext ctx) {
+        this.ctx = ctx;
+    }
+
+    @Override
+    public ByteBuffer allocateFrame() {
+        return ByteBuffer.allocate(ctx.getFrameSize());
+    }
+
+    @Override
+    public File createFile(String prefix, String suffix) throws IOException {
+        return File.createTempFile(prefix, suffix);
+    }
+}
\ No newline at end of file
diff --git a/hyracks/hyracks-control-nc/src/main/resources/edu/uci/ics/hyracks/control/cc/scheduler.olg b/hyracks/hyracks-control-nc/src/main/resources/edu/uci/ics/hyracks/control/cc/scheduler.olg
new file mode 100644
index 0000000..b230e0e
--- /dev/null
+++ b/hyracks/hyracks-control-nc/src/main/resources/edu/uci/ics/hyracks/control/cc/scheduler.olg
@@ -0,0 +1,310 @@
+program hyrackscc;
+
+import java.util.UUID;
+import java.util.Set;
+
+import jol.types.basic.Tuple;
+import jol.types.basic.TupleSet;
+
+import edu.uci.ics.hyracks.api.dataflow.ActivityNodeId;
+import edu.uci.ics.hyracks.api.dataflow.OperatorDescriptorId;
+import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor;
+import edu.uci.ics.hyracks.api.dataflow.ConnectorDescriptorId;
+import edu.uci.ics.hyracks.api.dataflow.IConnectorDescriptor;
+import edu.uci.ics.hyracks.api.job.JobStatus;
+import edu.uci.ics.hyracks.control.common.job.JobPlan;
+
+define(activitystage_temp, keys(), {UUID, OperatorDescriptorId, ActivityNodeId, Integer});
+
+activitystage_INITIAL activitystage_temp(JobId, OperatorId, ActivityId, 0) :-
+    activitynode(JobId, OperatorId, ActivityId, _);
+
+activitystage_BLOCKED activitystage_temp(JobId, OperatorId2, ActivityId2, StageNumber) :-
+    activitystage_temp(JobId, OperatorId1, ActivityId1, StageNumber1),
+    activitystage_temp(JobId, OperatorId2, ActivityId2, StageNumber2),
+    activityblocked(JobId, OperatorId1, ActivityId1, OperatorId2, ActivityId2),
+    StageNumber2 <= StageNumber1
+    {
+        StageNumber := StageNumber1 + 1;
+    };
+
+activitystage_PIPELINED_1 activitystage_temp(JobId, OperatorId2, ActivityId2, StageNumber) :-
+    activitystage_temp(JobId, OperatorId1, ActivityId1, StageNumber1),
+    activitystage_temp(JobId, OperatorId2, ActivityId2, StageNumber2),
+    activityconnection(JobId, OperatorId1, Operator1Port, edu.uci.ics.hyracks.api.dataflow.Direction.OUTPUT, ActivityId1, _),
+    activityconnection(JobId, OperatorId2, Operator2Port, edu.uci.ics.hyracks.api.dataflow.Direction.INPUT, ActivityId2, _),
+    connectordescriptor(JobId, _, OperatorId1, Operator1Port, OperatorId2, Operator2Port, _),
+    StageNumber1 != StageNumber2
+    {
+        StageNumber := java.lang.Math.max(StageNumber1, StageNumber2);
+    };
+
+activitystage_PIPELINED_2 activitystage_temp(JobId, OperatorId1, ActivityId1, StageNumber) :-
+    activitystage_temp(JobId, OperatorId1, ActivityId1, StageNumber1),
+    activitystage_temp(JobId, OperatorId2, ActivityId2, StageNumber2),
+    activityconnection(JobId, OperatorId1, Operator1Port, edu.uci.ics.hyracks.api.dataflow.Direction.OUTPUT, ActivityId1, _),
+    activityconnection(JobId, OperatorId2, Operator2Port, edu.uci.ics.hyracks.api.dataflow.Direction.INPUT, ActivityId2, _),
+    connectordescriptor(JobId, _, OperatorId1, Operator1Port, OperatorId2, Operator2Port, _),
+    StageNumber1 != StageNumber2
+    {
+        StageNumber := java.lang.Math.max(StageNumber1, StageNumber2);
+    };
+
+watch(activitystage_temp, a);
+
+watch(activityconnection, a);
+watch(activityblocked, a);
+watch(operatordescriptor, a);
+watch(connectordescriptor, a);
+
+watch(activitystage, a);
+watch(activitystage, i);
+watch(activitystage, d);
+
+define(activitystage, keys(0, 1, 2), {UUID, OperatorDescriptorId, ActivityNodeId, Integer});
+
+activitystage(JobId, OperatorId, ActivityId, max<StageNumber>) :-
+    activitystage_temp(JobId, OperatorId, ActivityId, StageNumber);
+
+define(jobstage, keys(0, 1), {UUID, Integer, UUID});
+
+jobstage(JobId, StageNumber, StageId) :-
+    activitystage(JobId, _, _, StageNumber)
+    {
+        StageId := java.util.UUID.randomUUID();
+    };
+
+watch(jobstage, a);
+
+define(jobattempt, keys(), {UUID, Integer});
+
+jobattempt(JobId, 0) :-
+    job(JobId, edu.uci.ics.hyracks.api.job.JobStatus.INITIALIZED, _, _, _),
+    jobstart(JobId, _);
+
+jobattempt(JobId, NextAttempt) :-
+    jobattempt(JobId, Attempt),
+    stagestart(JobId, _, Attempt),
+    abortcomplete(JobId, _, Attempt)
+    {
+        NextAttempt := Attempt + 1;
+    };
+
+define(stagestart, keys(), {UUID, Integer, Integer});
+define(stagefinish, keys(0, 1, 2), {UUID, Integer, Integer, Set});
+
+watch(jobstart, i);
+
+stagestart_INITIAL stagestart(JobId, 0, Attempt) :-
+    jobattempt#insert(JobId, Attempt);
+
+update_job_status_RUNNING job(JobId, edu.uci.ics.hyracks.api.job.JobStatus.RUNNING, JobSpec, JobPlan, null) :-
+    job(JobId, edu.uci.ics.hyracks.api.job.JobStatus.INITIALIZED, JobSpec, JobPlan, _),
+    jobstart(JobId, _);
+
+stagestart_NEXT stagestart(JobId, NextStageNumber, Attempt) :-
+    stagestart(JobId, StageNumber, Attempt),
+    stagefinish#insert(StageId, StageNumber, Attempt, _)
+    {
+        NextStageNumber := StageNumber + 1;
+    };
+
+watch(stagestart, a);
+watch(stagestart, d);
+
+define(operatorlocationcandidates, keys(), {UUID, OperatorDescriptorId, String, Integer, Integer});
+
+operatorlocationcandidates(JobId, OperatorId, NodeId, Partition, Benefit) :-
+    operatorlocation(JobId, OperatorId, NodeId, Partition, Benefit),
+    availablenodes(NodeId);
+
+watch(availablenodes, a);
+watch(availablenodes, i);
+watch(availablenodes, d);
+
+define(availablenodecount, keys(0), {Integer, Integer});
+
+watch(availablenodecount, a);
+watch(availablenodecount, i);
+watch(availablenodecount, d);
+
+availablenodecount(0, count<NodeId>) :-
+    availablenodes(NodeId);
+
+watch(rankedavailablenodes, a);
+watch(rankedavailablenodes, i);
+watch(rankedavailablenodes, d);
+
+watch(operatorlocationcandidates, a);
+watch(operatorlocationcandidates, i);
+watch(operatorlocationcandidates, d);
+
+define(maxoperatorlocationbenefit, keys(0, 1, 2), {UUID, OperatorDescriptorId, Integer, Integer});
+
+maxoperatorlocationbenefit(JobId, OperatorId, Partition, max<Benefit>) :-
+    operatorlocationcandidates(JobId, OperatorId, _, Partition, Benefit);
+
+watch(maxoperatorlocationbenefit, a);
+watch(maxoperatorlocationbenefit, i);
+watch(maxoperatorlocationbenefit, d);
+
+define(attemptoperatorlocationdecision, keys(0, 1, 3, 4), {UUID, OperatorDescriptorId, String, Integer, Integer});
+
+watch(attemptoperatorlocationdecision, a);
+watch(attemptoperatorlocationdecision, i);
+watch(attemptoperatorlocationdecision, d);
+
+attemptoperatorlocationdecision(JobId, OperatorId, NodeId, Partition, Attempt) :-
+    jobattempt#insert(JobId, Attempt),
+    operatorlocationcandidates(JobId, OperatorId, NodeId, Partition, Benefit),
+    maxoperatorlocationbenefit(JobId, OperatorId, Partition, Benefit);
+
+attemptoperatorlocationdecision(JobId, OperatorId, NodeId, Partition, Attempt) :-
+    jobattempt#insert(JobId, Attempt),
+    operatorclonecountexpansiontotalorder(JobId, OperatorId, Partition, CloneRank),
+    rankedavailablenodes(NodeId, NodeRank),
+    availablenodecount(_, NodeCount),
+    NodeRank == CloneRank % NodeCount;
+
+define(operatorclonecount_temp, keys(), {UUID, OperatorDescriptorId, Integer, Integer});
+
+operatorclonecount_temp(JobId, OperatorId, NPartitions, 0) :-
+    operatorclonecount(JobId, OperatorId, NPartitions);
+
+define(operatorclonecountexpansiontotalorder, keys(0, 1, 2), {UUID, OperatorDescriptorId, Integer, Integer});
+
+operatorclonecountexpansiontotalorder(JobId, OperatorId, Partition, Rank) :-
+    expandpartitioncountconstraint(operatorclonecount_temp(JobId, OperatorId, Partition, Rank));
+
+watch(operatorclonecountexpansiontotalorder, a);
+watch(operatorclonecountexpansiontotalorder, i);
+watch(operatorclonecountexpansiontotalorder, d);
+
+watch(operatorclonecount, a);
+watch(operatorclonecount, i);
+watch(operatorclonecount, d);
+
+define(activitystart, keys(), {UUID, OperatorDescriptorId, ActivityNodeId, Integer, Integer, UUID, String, Integer});
+
+activitystart(JobId, OperatorId, ActivityId, StageNumber, Attempt, StageId, NodeId, Partition) :-
+    stagestart#insert(JobId, StageNumber, Attempt),
+    operatordescriptor(JobId, OperatorId, _, _),
+    activitystage(JobId, OperatorId, ActivityId, StageNumber),
+    jobstage(JobId, StageNumber, StageId),
+    attemptoperatorlocationdecision(JobId, OperatorId, NodeId, Partition, Attempt);
+
+watch(activitystart, a);
+
+define(stageletstart, keys(0, 1, 3, 4), {UUID, UUID, JobPlan, String, Integer, Set});
+
+stageletstart(JobId, StageId, JobPlan, NodeId, Attempt, set<ActivityInfo>) :-
+    activitystart#insert(JobId, _, ActivityId, StageNumber, Attempt, StageId, NodeId, Partition),
+    job(JobId, edu.uci.ics.hyracks.api.job.JobStatus.RUNNING, _, JobPlan, _)
+    {
+        ActivityInfo := [ActivityId, Partition];
+    };
+
+watch(stageletstart, a);
+watch(stageletstart, i);
+
+define(startmessage_agg, keys(0, 1, 2), {UUID, UUID, Integer, JobPlan, Set});
+
+startmessage_agg(JobId, StageId, Attempt, JobPlan, set<Tuple>) :-
+    stageletstart#insert(JobId, StageId, JobPlan, NodeId, Attempt, ActivityInfoSet),
+    availablenodes(NodeId),
+    ActivityInfoSet.size() != 0
+    {
+        Tuple := [NodeId, ActivityInfoSet];
+    };
+
+startmessage(JobId, StageId, Attempt, JobPlan, TSet) :-
+    startmessage_agg(JobId, StageId, Attempt, JobPlan, TSet);
+
+watch(startmessage, a);
+watch(startmessage, i);
+
+define(stageletabort, keys(0, 1, 3, 4), {UUID, UUID, JobPlan, String, Integer, Set});
+
+stageletabort(JobId, StageId, JobPlan, NodeId, Attempt, ActivityIdSet) :-
+    stageletfailure(JobId, StageId, NodeId, Attempt),
+    stageletstart(JobId, StageId, JobPlan, NodeId, Attempt, ActivityIdSet);
+
+stageletabort(JobId, StageId, JobPlan, NodeIdOther, Attempt, ActivityIdSet) :-
+    stageletstart(JobId, StageId, JobPlan, NodeId, Attempt, _),
+    stageletstart(JobId, StageId, _, NodeIdOther, Attempt, ActivityIdSet),
+    failednodes#insert(NodeId),
+    notin stageletcomplete(JobId, StageId, NodeId, Attempt, _);
+
+watch(stageletabort, a);
+watch(stageletabort, i);
+watch(stageletabort, d);
+
+define(stageabort, keys(0, 1, 2), {UUID, UUID, Integer, Set});
+
+stageabort(JobId, StageId, Attempt, set<NodeId>) :-
+    stageletabort#insert(JobId, StageId, _, NodeId, Attempt, _);
+
+define(abortmessage_agg, keys(0, 1, 2), {UUID, UUID, Integer, JobPlan, Set});
+
+abortmessage_agg(JobId, StageId, Attempt, JobPlan, set<Tuple>) :-
+    stageletabort#insert(JobId, StageId, JobPlan, NodeId, Attempt, ActivityIdSet),
+    availablenodes(NodeId)
+    {
+        Tuple := [NodeId, ActivityIdSet];
+    };
+
+abortmessage(JobId, StageId, Attempt, JobPlan, TSet) :-
+    abortmessage_agg(JobId, StageId, Attempt, JobPlan, TSet),
+    TSet.size() != 0;
+
+watch(abortmessage, a);
+watch(abortmessage, i);
+
+define(stageletabortcomplete, keys(), {UUID, UUID, String, Integer});
+
+stageletabortcomplete(JobId, StageId, NodeId, Attempt) :-
+    abortnotify(JobId, StageId, NodeId, Attempt);
+
+stageletabortcomplete(JobId, StageId, NodeId, Attempt) :-
+    stageletabort(JobId, StageId, _, NodeId, Attempt, _),
+    notin availablenodes(NodeId);
+
+define(stageletabortcomplete_agg, keys(0, 1, 2), {UUID, UUID, Integer, Set});
+
+stageletabortcomplete_agg(JobId, StageId, Attempt, set<NodeId>) :-
+    stageletabortcomplete(JobId, StageId, NodeId, Attempt);
+
+define(abortcomplete, keys(), {UUID, UUID, Integer});
+
+abortcomplete(JobId, StageId, Attempt) :-
+    stageletabortcomplete_agg(JobId, StageId, Attempt, NodeIdSet1),
+    stageabort(JobId, StageId, Attempt, NodeIdSet2),
+    NodeIdSet1.size() == NodeIdSet2.size();
+
+define(stageletcomplete_agg, keys(0, 1, 2), {UUID, UUID, Integer, Set});
+
+stageletcomplete_agg(JobId, StageId, Attempt, set<Statistics>) :-
+    stageletcomplete(JobId, StageId, NodeId, Attempt, Statistics);
+
+stagefinish(JobId, StageNumber, Attempt, SSet) :-
+    startmessage_agg(JobId, StageId, Attempt, _, TSet),
+    stageletcomplete_agg(JobId, StageId, Attempt, SSet),
+    jobstage(JobId, StageNumber, StageId),
+    TSet.size() == SSet.size();
+
+update_job_status_TERMINATED job(JobId, edu.uci.ics.hyracks.api.job.JobStatus.TERMINATED, JobSpec, JobPlan, null) :-
+    job(JobId, edu.uci.ics.hyracks.api.job.JobStatus.RUNNING, JobSpec, JobPlan, _),
+    stagestart#insert(JobId, StageNumber, Attempt),
+    stagefinish(JobId, _, Attempt, SSet),
+    notin jobstage(JobId, StageNumber);
+
+define(jobcleanup_agg, {UUID, Set});
+
+jobcleanup_agg(JobId, set<NodeId>) :-
+    stagestart#insert(JobId, StageNumber, Attempt),
+    stagefinish(JobId, _, Attempt, _),
+    attemptoperatorlocationdecision(JobId, _, NodeId, _, Attempt),
+    notin jobstage(JobId, StageNumber);
+
+jobcleanup(JobId, NodeIdSet) :-
+    jobcleanup_agg(JobId, NodeIdSet);
\ No newline at end of file