diff --git a/pom.xml b/pom.xml
index 7d08fb7..6e28021 100644
--- a/pom.xml
+++ b/pom.xml
@@ -44,7 +44,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.13</version>
+        <version>2.12</version>
         <configuration>
             <forkMode>pertest</forkMode>
             <argLine>-enableassertions -Djava.util.logging.config.file=${user.home}/logging.properties -Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=n ${jvm.extraargs}</argLine>
@@ -53,16 +53,6 @@
     </plugins>
   </build>
 
-  <reporting>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-changelog-plugin</artifactId>
-        <version>2.2</version>
-      </plugin>
-    </plugins>
-  </reporting>
-
   <distributionManagement>
     <repository>
       <id>hyracks-releases</id>
diff --git a/pregelix-api/pom.xml b/pregelix-api/pom.xml
index 8212e1c..10efa59 100644
--- a/pregelix-api/pom.xml
+++ b/pregelix-api/pom.xml
@@ -41,9 +41,10 @@
 				</configuration>
 			</plugin>
 			<plugin>
-				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
-				<configuration>
+				<groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-clean-plugin</artifactId>
+                <version>2.4.1</version>
+                <configuration>
 					<filesets>
 						<fileset>
 							<directory>.</directory>
diff --git a/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java b/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java
index 3a98fd9..cd49184 100644
--- a/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java
+++ b/pregelix-api/src/main/java/edu/uci/ics/pregelix/api/graph/Vertex.java
@@ -49,510 +49,525 @@
  */
 @SuppressWarnings("rawtypes")
 public abstract class Vertex<I extends WritableComparable, V extends Writable, E extends Writable, M extends Writable>
-        implements Writable {
-    private static long superstep = 0;
-    /** Class-wide number of vertices */
-    private static long numVertices = -1;
-    /** Class-wide number of edges */
-    private static long numEdges = -1;
-    /** Vertex id */
-    private I vertexId = null;
-    /** Vertex value */
-    private V vertexValue = null;
-    /** Map of destination vertices and their edge values */
-    private final List<Edge<I, E>> destEdgeList = new ArrayList<Edge<I, E>>();
-    /** If true, do not do anymore computation on this vertex. */
-    boolean halt = false;
-    /** List of incoming messages from the previous superstep */
-    private final List<M> msgList = new ArrayList<M>();
-    /** map context */
-    private static TaskAttemptContext context = null;
-    /** a delegate for hyracks stuff */
-    private VertexDelegate<I, V, E, M> delegate = new VertexDelegate<I, V, E, M>(this);
-    /** this vertex is updated or not */
-    private boolean updated = false;
-    /** has outgoing messages */
-    private boolean hasMessage = false;
-    /** created new vertex */
-    private boolean createdNewLiveVertex = false;
+		implements Writable {
+	private static long superstep = 0;
+	/** Class-wide number of vertices */
+	private static long numVertices = -1;
+	/** Class-wide number of edges */
+	private static long numEdges = -1;
+	/** Vertex id */
+	private I vertexId = null;
+	/** Vertex value */
+	private V vertexValue = null;
+	/** Map of destination vertices and their edge values */
+	private final List<Edge<I, E>> destEdgeList = new ArrayList<Edge<I, E>>();
+	/** If true, do not do anymore computation on this vertex. */
+	boolean halt = false;
+	/** List of incoming messages from the previous superstep */
+	private final List<M> msgList = new ArrayList<M>();
+	/** map context */
+	private static TaskAttemptContext context = null;
+	/** a delegate for hyracks stuff */
+	private VertexDelegate<I, V, E, M> delegate = new VertexDelegate<I, V, E, M>(
+			this);
+	/** this vertex is updated or not */
+	private boolean updated = false;
+	/** has outgoing messages */
+	private boolean hasMessage = false;
+	/** created new vertex */
+	private boolean createdNewLiveVertex = false;
 
-    /**
-     * use object pool for re-using objects
-     */
-    private List<Edge<I, E>> edgePool = new ArrayList<Edge<I, E>>();
-    private List<M> msgPool = new ArrayList<M>();
-    private List<V> valuePool = new ArrayList<V>();
-    private int usedEdge = 0;
-    private int usedMessage = 0;
-    private int usedValue = 0;
+	/**
+	 * use object pool for re-using objects
+	 */
+	private List<Edge<I, E>> edgePool = new ArrayList<Edge<I, E>>();
+	private List<M> msgPool = new ArrayList<M>();
+	private List<V> valuePool = new ArrayList<V>();
+	private int usedEdge = 0;
+	private int usedMessage = 0;
+	private int usedValue = 0;
 
-    /**
-     * The key method that users need to implement
-     * 
-     * @param msgIterator
-     *            an iterator of incoming messages
-     */
-    public abstract void compute(Iterator<M> msgIterator);
+	/**
+	 * The key method that users need to implement
+	 * 
+	 * @param msgIterator
+	 *            an iterator of incoming messages
+	 */
+	public abstract void compute(Iterator<M> msgIterator);
 
-    /**
-     * Add an edge for the vertex.
-     * 
-     * @param targetVertexId
-     * @param edgeValue
-     * @return successful or not
-     */
-    public final boolean addEdge(I targetVertexId, E edgeValue) {
-        Edge<I, E> edge = this.allocateEdge();
-        edge.setDestVertexId(targetVertexId);
-        edge.setEdgeValue(edgeValue);
-        destEdgeList.add(edge);
-        return true;
-    }
+	/**
+	 * Add an edge for the vertex.
+	 * 
+	 * @param targetVertexId
+	 * @param edgeValue
+	 * @return successful or not
+	 */
+	public final boolean addEdge(I targetVertexId, E edgeValue) {
+		Edge<I, E> edge = this.allocateEdge();
+		edge.setDestVertexId(targetVertexId);
+		edge.setEdgeValue(edgeValue);
+		destEdgeList.add(edge);
+		updated = true;
+		return true;
+	}
 
-    /**
-     * Initialize a new vertex
-     * 
-     * @param vertexId
-     * @param vertexValue
-     * @param edges
-     * @param messages
-     */
-    public void initialize(I vertexId, V vertexValue, Map<I, E> edges, List<M> messages) {
-        if (vertexId != null) {
-            setVertexId(vertexId);
-        }
-        if (vertexValue != null) {
-            setVertexValue(vertexValue);
-        }
-        destEdgeList.clear();
-        if (edges != null && !edges.isEmpty()) {
-            for (Map.Entry<I, E> entry : edges.entrySet()) {
-                destEdgeList.add(new Edge<I, E>(entry.getKey(), entry.getValue()));
-            }
-        }
-        if (messages != null && !messages.isEmpty()) {
-            msgList.addAll(messages);
-        }
-    }
+	/**
+	 * Initialize a new vertex
+	 * 
+	 * @param vertexId
+	 * @param vertexValue
+	 * @param edges
+	 * @param messages
+	 */
+	public void initialize(I vertexId, V vertexValue, Map<I, E> edges,
+			List<M> messages) {
+		if (vertexId != null) {
+			setVertexId(vertexId);
+		}
+		if (vertexValue != null) {
+			setVertexValue(vertexValue);
+		}
+		destEdgeList.clear();
+		if (edges != null && !edges.isEmpty()) {
+			for (Map.Entry<I, E> entry : edges.entrySet()) {
+				destEdgeList.add(new Edge<I, E>(entry.getKey(), entry
+						.getValue()));
+			}
+		}
+		if (messages != null && !messages.isEmpty()) {
+			msgList.addAll(messages);
+		}
+	}
 
-    /**
-     * reset a vertex object: clear its internal states
-     */
-    public void reset() {
-        usedEdge = 0;
-        usedMessage = 0;
-        usedValue = 0;
-    }
+	/**
+	 * reset a vertex object: clear its internal states
+	 */
+	public void reset() {
+		usedEdge = 0;
+		usedMessage = 0;
+		usedValue = 0;
+		updated = false;
+	}
 
-    /**
-     * Set the vertex id
-     * 
-     * @param vertexId
-     */
-    public final void setVertexId(I vertexId) {
-        this.vertexId = vertexId;
-        delegate.setVertexId(vertexId);
-    }
+	/**
+	 * Set the vertex id
+	 * 
+	 * @param vertexId
+	 */
+	public final void setVertexId(I vertexId) {
+		this.vertexId = vertexId;
+		delegate.setVertexId(vertexId);
+	}
 
-    /**
-     * Get the vertex id
-     * 
-     * @return vertex id
-     */
-    public final I getVertexId() {
-        return vertexId;
-    }
+	/**
+	 * Get the vertex id
+	 * 
+	 * @return vertex id
+	 */
+	public final I getVertexId() {
+		return vertexId;
+	}
 
-    /**
-     * Get the vertex value
-     * 
-     * @return the vertex value
-     */
-    public final V getVertexValue() {
-        return vertexValue;
-    }
+	/**
+	 * Get the vertex value
+	 * 
+	 * @return the vertex value
+	 */
+	public final V getVertexValue() {
+		return vertexValue;
+	}
 
-    /**
-     * Set the vertex value
-     * 
-     * @param vertexValue
-     */
-    public final void setVertexValue(V vertexValue) {
-        this.vertexValue = vertexValue;
-        this.updated = true;
-    }
+	/**
+	 * Set the vertex value
+	 * 
+	 * @param vertexValue
+	 */
+	public final void setVertexValue(V vertexValue) {
+		this.vertexValue = vertexValue;
+		this.updated = true;
+	}
 
-    /***
-     * Send a message to a specific vertex
-     * 
-     * @param id
-     *            the receiver vertex id
-     * @param msg
-     *            the message
-     */
-    public final void sendMsg(I id, M msg) {
-        if (msg == null) {
-            throw new IllegalArgumentException("sendMsg: Cannot send null message to " + id);
-        }
-        delegate.sendMsg(id, msg);
-        this.hasMessage = true;
-    }
+	/***
+	 * Send a message to a specific vertex
+	 * 
+	 * @param id
+	 *            the receiver vertex id
+	 * @param msg
+	 *            the message
+	 */
+	public final void sendMsg(I id, M msg) {
+		if (msg == null) {
+			throw new IllegalArgumentException(
+					"sendMsg: Cannot send null message to " + id);
+		}
+		delegate.sendMsg(id, msg);
+		this.hasMessage = true;
+	}
 
-    /**
-     * Send a message to all direct outgoing neighbors
-     * 
-     * @param msg
-     *            the message
-     */
-    public final void sendMsgToAllEdges(M msg) {
-        if (msg == null) {
-            throw new IllegalArgumentException("sendMsgToAllEdges: Cannot send null message to all edges");
-        }
-        for (Edge<I, E> edge : destEdgeList) {
-            sendMsg(edge.getDestVertexId(), msg);
-        }
-    }
+	/**
+	 * Send a message to all direct outgoing neighbors
+	 * 
+	 * @param msg
+	 *            the message
+	 */
+	public final void sendMsgToAllEdges(M msg) {
+		if (msg == null) {
+			throw new IllegalArgumentException(
+					"sendMsgToAllEdges: Cannot send null message to all edges");
+		}
+		for (Edge<I, E> edge : destEdgeList) {
+			sendMsg(edge.getDestVertexId(), msg);
+		}
+	}
 
-    /**
-     * Vote to halt. Once all vertex vote to halt and no more messages, a
-     * Pregelix job will terminate.
-     */
-    public final void voteToHalt() {
-        halt = true;
-    }
+	/**
+	 * Vote to halt. Once all vertex vote to halt and no more messages, a
+	 * Pregelix job will terminate.
+	 */
+	public final void voteToHalt() {
+		halt = true;
+		updated = true;
+	}
 
-    /**
-     * @return the vertex is halted (true) or not (false)
-     */
-    public final boolean isHalted() {
-        return halt;
-    }
+	/**
+	 * @return the vertex is halted (true) or not (false)
+	 */
+	public final boolean isHalted() {
+		return halt;
+	}
 
-    @Override
-    final public void readFields(DataInput in) throws IOException {
-        reset();
-        if (vertexId == null)
-            vertexId = BspUtils.<I> createVertexIndex(getContext().getConfiguration());
-        vertexId.readFields(in);
-        delegate.setVertexId(vertexId);
-        boolean hasVertexValue = in.readBoolean();
+	@Override
+	final public void readFields(DataInput in) throws IOException {
+		reset();
+		if (vertexId == null)
+			vertexId = BspUtils.<I> createVertexIndex(getContext()
+					.getConfiguration());
+		vertexId.readFields(in);
+		delegate.setVertexId(vertexId);
+		boolean hasVertexValue = in.readBoolean();
 
-        if (hasVertexValue) {
-            vertexValue = allocateValue();
-            vertexValue.readFields(in);
-            delegate.setVertex(this);
-        }
-        destEdgeList.clear();
-        long edgeMapSize = SerDeUtils.readVLong(in);
-        for (long i = 0; i < edgeMapSize; ++i) {
-            Edge<I, E> edge = allocateEdge();
-            edge.setConf(getContext().getConfiguration());
-            edge.readFields(in);
-            addEdge(edge);
-        }
-        msgList.clear();
-        long msgListSize = SerDeUtils.readVLong(in);
-        for (long i = 0; i < msgListSize; ++i) {
-            M msg = allocateMessage();
-            msg.readFields(in);
-            msgList.add(msg);
-        }
-        halt = in.readBoolean();
-        updated = false;
-        hasMessage = false;
-        createdNewLiveVertex = false;
-    }
+		if (hasVertexValue) {
+			vertexValue = allocateValue();
+			vertexValue.readFields(in);
+			delegate.setVertex(this);
+		}
+		destEdgeList.clear();
+		long edgeMapSize = SerDeUtils.readVLong(in);
+		for (long i = 0; i < edgeMapSize; ++i) {
+			Edge<I, E> edge = allocateEdge();
+			edge.setConf(getContext().getConfiguration());
+			edge.readFields(in);
+			addEdge(edge);
+		}
+		msgList.clear();
+		long msgListSize = SerDeUtils.readVLong(in);
+		for (long i = 0; i < msgListSize; ++i) {
+			M msg = allocateMessage();
+			msg.readFields(in);
+			msgList.add(msg);
+		}
+		halt = in.readBoolean();
+		updated = false;
+		hasMessage = false;
+		createdNewLiveVertex = false;
+	}
 
-    @Override
-    public void write(DataOutput out) throws IOException {
-        vertexId.write(out);
-        out.writeBoolean(vertexValue != null);
-        if (vertexValue != null) {
-            vertexValue.write(out);
-        }
-        SerDeUtils.writeVLong(out, destEdgeList.size());
-        for (Edge<I, E> edge : destEdgeList) {
-            edge.write(out);
-        }
-        SerDeUtils.writeVLong(out, msgList.size());
-        for (M msg : msgList) {
-            msg.write(out);
-        }
-        out.writeBoolean(halt);
-    }
+	@Override
+	public void write(DataOutput out) throws IOException {
+		vertexId.write(out);
+		out.writeBoolean(vertexValue != null);
+		if (vertexValue != null) {
+			vertexValue.write(out);
+		}
+		SerDeUtils.writeVLong(out, destEdgeList.size());
+		for (Edge<I, E> edge : destEdgeList) {
+			edge.write(out);
+		}
+		SerDeUtils.writeVLong(out, msgList.size());
+		for (M msg : msgList) {
+			msg.write(out);
+		}
+		out.writeBoolean(halt);
+	}
 
-    /**
-     * Get the list of incoming messages
-     * 
-     * @return the list of messages
-     */
-    public List<M> getMsgList() {
-        return msgList;
-    }
+	/**
+	 * Get the list of incoming messages
+	 * 
+	 * @return the list of messages
+	 */
+	public List<M> getMsgList() {
+		return msgList;
+	}
 
-    /**
-     * Get outgoing edge list
-     * 
-     * @return a list of outgoing edges
-     */
-    public List<Edge<I, E>> getEdges() {
-        return this.destEdgeList;
-    }
+	/**
+	 * Get outgoing edge list
+	 * 
+	 * @return a list of outgoing edges
+	 */
+	public List<Edge<I, E>> getEdges() {
+		return this.destEdgeList;
+	}
 
-    @Override
-    @SuppressWarnings("unchecked")
-    public String toString() {
-        Collections.sort(destEdgeList);
-        StringBuffer edgeBuffer = new StringBuffer();
-        edgeBuffer.append("(");
-        for (Edge<I, E> edge : destEdgeList) {
-            edgeBuffer.append(edge.getDestVertexId()).append(",");
-        }
-        edgeBuffer.append(")");
-        return "Vertex(id=" + getVertexId() + ",value=" + getVertexValue() + ", edges=" + edgeBuffer + ")";
-    }
+	@Override
+	@SuppressWarnings("unchecked")
+	public String toString() {
+		Collections.sort(destEdgeList);
+		StringBuffer edgeBuffer = new StringBuffer();
+		edgeBuffer.append("(");
+		for (Edge<I, E> edge : destEdgeList) {
+			edgeBuffer.append(edge.getDestVertexId()).append(",");
+		}
+		edgeBuffer.append(")");
+		return "Vertex(id=" + getVertexId() + ",value=" + getVertexValue()
+				+ ", edges=" + edgeBuffer + ")";
+	}
 
-    /**
-     * Get the number of outgoing edges
-     * 
-     * @return the number of outging edges
-     */
-    public int getNumOutEdges() {
-        return destEdgeList.size();
-    }
+	/**
+	 * Get the number of outgoing edges
+	 * 
+	 * @return the number of outging edges
+	 */
+	public int getNumOutEdges() {
+		return destEdgeList.size();
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param writers
-     */
-    public void setOutputWriters(List<IFrameWriter> writers) {
-        delegate.setOutputWriters(writers);
-    }
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param writers
+	 */
+	public void setOutputWriters(List<IFrameWriter> writers) {
+		delegate.setOutputWriters(writers);
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param writers
-     */
-    public void setOutputAppenders(List<FrameTupleAppender> appenders) {
-        delegate.setOutputAppenders(appenders);
-    }
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param writers
+	 */
+	public void setOutputAppenders(List<FrameTupleAppender> appenders) {
+		delegate.setOutputAppenders(appenders);
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param writers
-     */
-    public void setOutputTupleBuilders(List<ArrayTupleBuilder> tbs) {
-        delegate.setOutputTupleBuilders(tbs);
-    }
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param writers
+	 */
+	public void setOutputTupleBuilders(List<ArrayTupleBuilder> tbs) {
+		delegate.setOutputTupleBuilders(tbs);
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param writers
-     */
-    public void finishCompute() throws IOException {
-        delegate.finishCompute();
-    }
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param writers
+	 */
+	public void finishCompute() throws IOException {
+		delegate.finishCompute();
+	}
 
-    /**
-     * Pregelix internal use only
-     */
-    public boolean hasUpdate() {
-        return this.updated;
-    }
+	/**
+	 * Pregelix internal use only
+	 */
+	public boolean hasUpdate() {
+		return this.updated;
+	}
 
-    /**
-     * Pregelix internal use only
-     */
-    public boolean hasMessage() {
-        return this.hasMessage;
-    }
+	/**
+	 * Pregelix internal use only
+	 */
+	public boolean hasMessage() {
+		return this.hasMessage;
+	}
 
-    /**
-     * Pregelix internal use only
-     */
-    public boolean createdNewLiveVertex() {
-        return this.createdNewLiveVertex;
-    }
+	/**
+	 * Pregelix internal use only
+	 */
+	public boolean createdNewLiveVertex() {
+		return this.createdNewLiveVertex;
+	}
 
-    /**
-     * sort the edges
-     */
-    @SuppressWarnings("unchecked")
-    public void sortEdges() {
-        Collections.sort(destEdgeList);
-    }
+	/**
+	 * sort the edges
+	 */
+	@SuppressWarnings("unchecked")
+	public void sortEdges() {
+		updated = true;
+		Collections.sort(destEdgeList);
+	}
 
-    /**
-     * Allocate a new edge from the edge pool
-     */
-    private Edge<I, E> allocateEdge() {
-        Edge<I, E> edge;
-        if (usedEdge < edgePool.size()) {
-            edge = edgePool.get(usedEdge);
-            usedEdge++;
-        } else {
-            edge = new Edge<I, E>();
-            edgePool.add(edge);
-            usedEdge++;
-        }
-        return edge;
-    }
+	/**
+	 * Allocate a new edge from the edge pool
+	 */
+	private Edge<I, E> allocateEdge() {
+		Edge<I, E> edge;
+		if (usedEdge < edgePool.size()) {
+			edge = edgePool.get(usedEdge);
+			usedEdge++;
+		} else {
+			edge = new Edge<I, E>();
+			edgePool.add(edge);
+			usedEdge++;
+		}
+		return edge;
+	}
 
-    /**
-     * Allocate a new message from the message pool
-     */
-    private M allocateMessage() {
-        M message;
-        if (usedMessage < msgPool.size()) {
-            message = msgPool.get(usedEdge);
-            usedMessage++;
-        } else {
-            message = BspUtils.<M> createMessageValue(getContext().getConfiguration());
-            msgPool.add(message);
-            usedMessage++;
-        }
-        return message;
-    }
+	/**
+	 * Allocate a new message from the message pool
+	 */
+	private M allocateMessage() {
+		M message;
+		if (usedMessage < msgPool.size()) {
+			message = msgPool.get(usedEdge);
+			usedMessage++;
+		} else {
+			message = BspUtils.<M> createMessageValue(getContext()
+					.getConfiguration());
+			msgPool.add(message);
+			usedMessage++;
+		}
+		return message;
+	}
 
-    /**
-     * Set the global superstep for all the vertices (internal use)
-     * 
-     * @param superstep
-     *            New superstep
-     */
-    public static final void setSuperstep(long superstep) {
-        Vertex.superstep = superstep;
-    }
+	/**
+	 * Set the global superstep for all the vertices (internal use)
+	 * 
+	 * @param superstep
+	 *            New superstep
+	 */
+	public static final void setSuperstep(long superstep) {
+		Vertex.superstep = superstep;
+	}
 
-    /**
-     * Add an outgoing edge into the vertex
-     * 
-     * @param edge
-     *            the edge to be added
-     * @return true if the edge list changed as a result of this call
-     */
-    public boolean addEdge(Edge<I, E> edge) {
-        edge.setConf(getContext().getConfiguration());
-        return destEdgeList.add(edge);
-    }
+	/**
+	 * Add an outgoing edge into the vertex
+	 * 
+	 * @param edge
+	 *            the edge to be added
+	 * @return true if the edge list changed as a result of this call
+	 */
+	public boolean addEdge(Edge<I, E> edge) {
+		edge.setConf(getContext().getConfiguration());
+		updated = true;
+		return destEdgeList.add(edge);
+	}
 
-    /**
-     * remove an outgoing edge in the graph
-     * 
-     * @param edge
-     *            the edge to be removed
-     * @return true if the edge is in the edge list of the vertex
-     */
-    public boolean removeEdge(Edge<I, E> edge) {
-        return destEdgeList.remove(edge);
-    }
+	/**
+	 * remove an outgoing edge in the graph
+	 * 
+	 * @param edge
+	 *            the edge to be removed
+	 * @return true if the edge is in the edge list of the vertex
+	 */
+	public boolean removeEdge(Edge<I, E> edge) {
+		updated = true;
+		return destEdgeList.remove(edge);
+	}
 
-    /**
-     * Add a new vertex into the graph
-     * 
-     * @param vertexId
-     *            the vertex id
-     * @param vertex
-     *            the vertex
-     */
-    public final void addVertex(I vertexId, Vertex vertex) {
-        createdNewLiveVertex |= !vertex.isHalted();
-        delegate.addVertex(vertexId, vertex);
-    }
+	/**
+	 * Add a new vertex into the graph
+	 * 
+	 * @param vertexId
+	 *            the vertex id
+	 * @param vertex
+	 *            the vertex
+	 */
+	public final void addVertex(I vertexId, Vertex vertex) {
+		createdNewLiveVertex |= !vertex.isHalted();
+		delegate.addVertex(vertexId, vertex);
+	}
 
-    /**
-     * Delete a vertex from id
-     * 
-     * @param vertexId
-     *            the vertex id
-     */
-    public final void deleteVertex(I vertexId) {
-        delegate.deleteVertex(vertexId);
-    }
+	/**
+	 * Delete a vertex from id
+	 * 
+	 * @param vertexId
+	 *            the vertex id
+	 */
+	public final void deleteVertex(I vertexId) {
+		delegate.deleteVertex(vertexId);
+	}
 
-    /**
-     * Allocate a vertex value from the object pool
-     * 
-     * @return a vertex value instance
-     */
-    private V allocateValue() {
-        V value;
-        if (usedValue < valuePool.size()) {
-            value = valuePool.get(usedValue);
-            usedValue++;
-        } else {
-            value = BspUtils.<V> createVertexValue(getContext().getConfiguration());
-            valuePool.add(value);
-            usedValue++;
-        }
-        return value;
-    }
+	/**
+	 * Allocate a vertex value from the object pool
+	 * 
+	 * @return a vertex value instance
+	 */
+	private V allocateValue() {
+		V value;
+		if (usedValue < valuePool.size()) {
+			value = valuePool.get(usedValue);
+			usedValue++;
+		} else {
+			value = BspUtils.<V> createVertexValue(getContext()
+					.getConfiguration());
+			valuePool.add(value);
+			usedValue++;
+		}
+		return value;
+	}
 
-    /**
-     * Get the current global superstep number
-     * 
-     * @return the current superstep number
-     */
-    public static final long getSuperstep() {
-        return superstep;
-    }
+	/**
+	 * Get the current global superstep number
+	 * 
+	 * @return the current superstep number
+	 */
+	public static final long getSuperstep() {
+		return superstep;
+	}
 
-    /**
-     * Set the total number of vertices from the last superstep.
-     * 
-     * @param numVertices
-     *            Aggregate vertices in the last superstep
-     */
-    public static final void setNumVertices(long numVertices) {
-        Vertex.numVertices = numVertices;
-    }
+	/**
+	 * Set the total number of vertices from the last superstep.
+	 * 
+	 * @param numVertices
+	 *            Aggregate vertices in the last superstep
+	 */
+	public static final void setNumVertices(long numVertices) {
+		Vertex.numVertices = numVertices;
+	}
 
-    /**
-     * Get the number of vertexes in the graph
-     * 
-     * @return the number of vertexes in the graph
-     */
-    public static final long getNumVertices() {
-        return numVertices;
-    }
+	/**
+	 * Get the number of vertexes in the graph
+	 * 
+	 * @return the number of vertexes in the graph
+	 */
+	public static final long getNumVertices() {
+		return numVertices;
+	}
 
-    /**
-     * Set the total number of edges from the last superstep.
-     * 
-     * @param numEdges
-     *            Aggregate edges in the last superstep
-     */
-    public static void setNumEdges(long numEdges) {
-        Vertex.numEdges = numEdges;
-    }
+	/**
+	 * Set the total number of edges from the last superstep.
+	 * 
+	 * @param numEdges
+	 *            Aggregate edges in the last superstep
+	 */
+	public static void setNumEdges(long numEdges) {
+		Vertex.numEdges = numEdges;
+	}
 
-    /**
-     * Get the number of edges from this graph
-     * 
-     * @return the number of edges in the graph
-     */
-    public static final long getNumEdges() {
-        return numEdges;
-    }
+	/**
+	 * Get the number of edges from this graph
+	 * 
+	 * @return the number of edges in the graph
+	 */
+	public static final long getNumEdges() {
+		return numEdges;
+	}
 
-    /**
-     * Pregelix internal use only
-     */
-    public static final TaskAttemptContext getContext() {
-        return context;
-    }
+	/**
+	 * Pregelix internal use only
+	 */
+	public static final TaskAttemptContext getContext() {
+		return context;
+	}
 
-    /**
-     * Pregelix internal use only
-     * 
-     * @param context
-     */
-    public static final void setContext(TaskAttemptContext context) {
-        Vertex.context = context;
-    }
+	/**
+	 * Pregelix internal use only
+	 * 
+	 * @param context
+	 */
+	public static final void setContext(TaskAttemptContext context) {
+		Vertex.context = context;
+	}
 
 }
diff --git a/pregelix-core/pom.xml b/pregelix-core/pom.xml
index 4c63452..f084614 100644
--- a/pregelix-core/pom.xml
+++ b/pregelix-core/pom.xml
@@ -19,8 +19,9 @@
 	<build>
 		<plugins>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-jar-plugin</artifactId>
-				<version>2.4</version>
+				<version>2.3.2</version>
 				<executions>
 					<execution>
 						<id>balancer</id>
@@ -73,7 +74,7 @@
 			<plugin>
 				<groupId>org.codehaus.mojo</groupId>
 				<artifactId>appassembler-maven-plugin</artifactId>
-				<version>1.3</version>
+                <version>1.3</version>
 				<executions>
 					<execution>
 						<configuration>
@@ -165,7 +166,7 @@
 			</plugin>
 			<plugin>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+                <version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
diff --git a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
index f07a246..d9b267d 100644
--- a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
+++ b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
@@ -141,22 +141,11 @@
             start = System.currentTimeMillis();
             runHDFSWRite(jobGen);
             runCleanup(jobGen);
-            destroyApplication(applicationName);
             end = System.currentTimeMillis();
             time = end - start;
             LOG.info("result writing finished " + time + "ms");
             LOG.info("job finished");
         } catch (Exception e) {
-            try {
-                /**
-                 * destroy application if there is any exception
-                 */
-                if (hcc != null) {
-                    destroyApplication(applicationName);
-                }
-            } catch (Exception e2) {
-                throw new HyracksException(e2);
-            }
             throw new HyracksException(e);
         }
     }
@@ -214,8 +203,8 @@
 
     private void execute(JobSpecification job) throws Exception {
         job.setUseConnectorPolicyForScheduling(false);
-        JobId jobId = hcc.startJob(applicationName, job,
-                profiling ? EnumSet.of(JobFlag.PROFILE_RUNTIME) : EnumSet.noneOf(JobFlag.class));
+        JobId jobId = hcc
+                .startJob(job, profiling ? EnumSet.of(JobFlag.PROFILE_RUNTIME) : EnumSet.noneOf(JobFlag.class));
         hcc.waitForCompletion(jobId);
     }
 
@@ -230,15 +219,11 @@
         LOG.info("jar packing finished " + (end - start) + "ms");
 
         start = System.currentTimeMillis();
-        hcc.createApplication(applicationName, appZip);
+        // TODO: Fix this step to use Yarn
+        //hcc.createApplication(applicationName, appZip);
         end = System.currentTimeMillis();
         LOG.info("jar deployment finished " + (end - start) + "ms");
     }
-
-    public void destroyApplication(String appName) throws Exception {
-        hcc.destroyApplication(appName);
-    }
-
 }
 
 class FileFilter implements FilenameFilter {
diff --git a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenInnerJoin.java b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenInnerJoin.java
index 419e4b0..fe2fcac 100644
--- a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenInnerJoin.java
+++ b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenInnerJoin.java
@@ -262,12 +262,10 @@
          */
         spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 3, insertOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), insertOp, 0, emptySink3, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), scanner, 4,
-                deleteOp, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 4, deleteOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), deleteOp, 0, emptySink4, 0);
 
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 5,
-                btreeBulkLoad, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 5, btreeBulkLoad, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), localSort, 0, localGby, 0);
         spec.connect(new MToNPartitioningMergingConnectorDescriptor(spec, partionFactory, keyFields, sortCmpFactories),
                 localGby, 0, globalGby, 0);
@@ -487,11 +485,9 @@
         /**
          * connect the insert/delete operator
          */
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), join, 3,
-                insertOp, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 3, insertOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), insertOp, 0, emptySink3, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), join, 4,
-                deleteOp, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 4, deleteOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), deleteOp, 0, emptySink4, 0);
 
         spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 5, btreeBulkLoad, 0);
diff --git a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoin.java b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoin.java
index 27394e6..f1eceb7 100644
--- a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoin.java
+++ b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoin.java
@@ -241,11 +241,9 @@
         /**
          * connect the insert/delete operator
          */
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), scanner, 3, insertOp,
-                0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 3, insertOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), insertOp, 0, emptySink3, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), scanner, 4, deleteOp,
-                0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 4, deleteOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), deleteOp, 0, emptySink4, 0);
 
         /**
@@ -449,9 +447,9 @@
         /**
          * connect the insert/delete operator
          */
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), join, 3, insertOp, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 3, insertOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), insertOp, 0, emptySink3, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), join, 4, deleteOp, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 4, deleteOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), deleteOp, 0, emptySink4, 0);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), localSort, 0, localGby, 0);
diff --git a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSingleSort.java b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSingleSort.java
index 91a629c..314c393 100644
--- a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSingleSort.java
+++ b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSingleSort.java
@@ -219,26 +219,24 @@
         EmptySinkOperatorDescriptor emptySink4 = new EmptySinkOperatorDescriptor(spec);
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
-        ITuplePartitionComputerFactory hashPartitionComputerFactory = new MergePartitionComputerFactory();
+        ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
                 rdUnnestedMessage.getFields()[0]);
         /** connect all operators **/
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, scanner, 0);
         spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 0, globalSort, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 1,
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), scanner, 1,
                 terminateWriter, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 2,
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), scanner, 2,
                 finalAggregator, 0);
 
         /**
          * connect the insert/delete operator
          */
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 3, insertOp,
-                0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 3, insertOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), insertOp, 0, emptySink3, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 4, deleteOp,
-                0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 4, deleteOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), deleteOp, 0, emptySink4, 0);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), globalSort, 0, globalGby, 0);
@@ -408,7 +406,7 @@
         EmptySinkOperatorDescriptor emptySink4 = new EmptySinkOperatorDescriptor(spec);
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
-        ITuplePartitionComputerFactory hashPartitionComputerFactory = new MergePartitionComputerFactory();
+        ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
                 rdUnnestedMessage.getFields()[0]);
 
@@ -417,16 +415,16 @@
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, materializeRead, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), materializeRead, 0, join, 0);
         spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 0, globalSort, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), join, 1,
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), join, 1,
                 terminateWriter, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), join, 2,
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), join, 2,
                 finalAggregator, 0);
         /**
          * connect the insert/delete operator
          */
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), join, 3, insertOp, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 3, insertOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), insertOp, 0, emptySink3, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), join, 4, deleteOp, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 4, deleteOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), deleteOp, 0, emptySink4, 0);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), globalSort, 0, globalGby, 0);
diff --git a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSort.java b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSort.java
index e653196..0c3db38 100644
--- a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSort.java
+++ b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/jobgen/JobGenOuterJoinSort.java
@@ -195,7 +195,7 @@
         TerminationStateWriterOperatorDescriptor terminateWriter = new TerminationStateWriterOperatorDescriptor(spec,
                 configurationFactory, jobId);
         PartitionConstraintHelper.addPartitionCountConstraint(spec, terminateWriter, 1);
-        ITuplePartitionComputerFactory hashPartitionComputerFactory = new MergePartitionComputerFactory();
+        ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
 
         /**
          * final aggregate write operator
@@ -239,18 +239,16 @@
         spec.connect(new OneToOneConnectorDescriptor(spec), emptyTupleSource, 0, preSuperStep, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, scanner, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), scanner, 0, localSort, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 1,
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), scanner, 1,
                 terminateWriter, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 2,
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), scanner, 2,
                 finalAggregator, 0);
         /**
          * connect the insert/delete operator
          */
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 3, insertOp,
-                0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 3, insertOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), insertOp, 0, emptySink3, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), scanner, 4, deleteOp,
-                0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), scanner, 4, deleteOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), deleteOp, 0, emptySink4, 0);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), localSort, 0, localGby, 0);
@@ -441,7 +439,7 @@
         EmptySinkOperatorDescriptor emptySink4 = new EmptySinkOperatorDescriptor(spec);
         ClusterConfig.setLocationConstraint(spec, emptySink4);
 
-        ITuplePartitionComputerFactory hashPartitionComputerFactory = new MergePartitionComputerFactory();
+        ITuplePartitionComputerFactory unifyingPartitionComputerFactory = new MergePartitionComputerFactory();
         ITuplePartitionComputerFactory partionFactory = new VertexIdPartitionComputerFactory(
                 rdUnnestedMessage.getFields()[0]);
 
@@ -450,16 +448,16 @@
         spec.connect(new OneToOneConnectorDescriptor(spec), preSuperStep, 0, materializeRead, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), materializeRead, 0, join, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), join, 0, localSort, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), join, 1,
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), join, 1,
                 terminateWriter, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), join, 2,
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, unifyingPartitionComputerFactory), join, 2,
                 finalAggregator, 0);
         /**
          * connect the insert/delete operator
          */
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), join, 3, insertOp, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 3, insertOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), insertOp, 0, emptySink3, 0);
-        spec.connect(new MToNPartitioningConnectorDescriptor(spec, hashPartitionComputerFactory), join, 4, deleteOp, 0);
+        spec.connect(new MToNPartitioningConnectorDescriptor(spec, partionFactory), join, 4, deleteOp, 0);
         spec.connect(new OneToOneConnectorDescriptor(spec), deleteOp, 0, emptySink4, 0);
 
         spec.connect(new OneToOneConnectorDescriptor(spec), localSort, 0, localGby, 0);
diff --git a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java
index 2a2e2bf..d099645 100644
--- a/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java
+++ b/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/util/PregelixHyracksIntegrationUtil.java
@@ -26,6 +26,7 @@
 import edu.uci.ics.hyracks.control.common.controllers.NCConfig;
 import edu.uci.ics.hyracks.control.nc.NodeControllerService;
 import edu.uci.ics.pregelix.core.jobgen.clusterconfig.ClusterConfig;
+import edu.uci.ics.pregelix.runtime.bootstrap.NCApplicationEntryPoint;
 
 public class PregelixHyracksIntegrationUtil {
 
@@ -64,7 +65,9 @@
         ncConfig1.clusterNetIPAddress = "localhost";
         ncConfig1.ccPort = TEST_HYRACKS_CC_PORT;
         ncConfig1.dataIPAddress = "127.0.0.1";
+        ncConfig1.datasetIPAddress = "127.0.0.1";
         ncConfig1.nodeId = NC1_ID;
+        ncConfig1.appNCMainClass = NCApplicationEntryPoint.class.getName();
         nc1 = new NodeControllerService(ncConfig1);
         nc1.start();
 
@@ -73,7 +76,9 @@
         ncConfig2.clusterNetIPAddress = "localhost";
         ncConfig2.ccPort = TEST_HYRACKS_CC_PORT;
         ncConfig2.dataIPAddress = "127.0.0.1";
+        ncConfig2.datasetIPAddress = "127.0.0.1";
         ncConfig2.nodeId = NC2_ID;
+        ncConfig2.appNCMainClass = NCApplicationEntryPoint.class.getName();
         nc2 = new NodeControllerService(ncConfig2);
         nc2.start();
 
@@ -82,14 +87,6 @@
         ClusterConfig.loadClusterConfig(CC_HOST, TEST_HYRACKS_CC_CLIENT_PORT);
     }
 
-    public static void destroyApp(String hyracksAppName) throws Exception {
-        hcc.destroyApplication(hyracksAppName);
-    }
-
-    public static void createApp(String hyracksAppName) throws Exception {
-        hcc.createApplication(hyracksAppName, null);
-    }
-
     public static void deinit() throws Exception {
         nc2.stop();
         nc1.stop();
@@ -98,7 +95,7 @@
 
     public static void runJob(JobSpecification spec, String appName) throws Exception {
         spec.setFrameSize(FRAME_SIZE);
-        JobId jobId = hcc.startJob(appName, spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
+        JobId jobId = hcc.startJob(spec, EnumSet.of(JobFlag.PROFILE_RUNTIME));
         hcc.waitForCompletion(jobId);
     }
 
diff --git a/pregelix-core/src/main/resources/scripts/getip.sh b/pregelix-core/src/main/resources/scripts/getip.sh
index e0cdf73..a691c0f 100755
--- a/pregelix-core/src/main/resources/scripts/getip.sh
+++ b/pregelix-core/src/main/resources/scripts/getip.sh
@@ -6,6 +6,10 @@
 then
         #Get IP Address
         IPADDR=`/sbin/ifconfig eth0 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
+    	if [ "$IPADDR" = "" ]
+        then
+		IPADDR=`/sbin/ifconfig em1 | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
+        fi 
 	if [ "$IPADDR" = "" ]
         then
 		IPADDR=`/sbin/ifconfig lo | grep "inet " | awk '{print $2}' | cut -f 2 -d ':'`
diff --git a/pregelix-core/src/main/resources/scripts/startcc.sh b/pregelix-core/src/main/resources/scripts/startcc.sh
index fe2551d..efb79ce 100644
--- a/pregelix-core/src/main/resources/scripts/startcc.sh
+++ b/pregelix-core/src/main/resources/scripts/startcc.sh
@@ -22,4 +22,4 @@
 
 #Launch hyracks cc script
 chmod -R 755 $HYRACKS_HOME
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 3 &> $CCLOGS_DIR/cc.log &
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyrackscc -client-net-ip-address $CCHOST -cluster-net-ip-address $CCHOST -client-net-port $CC_CLIENTPORT -cluster-net-port $CC_CLUSTERPORT -max-heartbeat-lapse-periods 999999 -default-max-job-attempts 0 -job-history-size 0 &> $CCLOGS_DIR/cc.log &
diff --git a/pregelix-core/src/main/resources/scripts/startnc.sh b/pregelix-core/src/main/resources/scripts/startnc.sh
index 6e0f90e..b059aad 100644
--- a/pregelix-core/src/main/resources/scripts/startnc.sh
+++ b/pregelix-core/src/main/resources/scripts/startnc.sh
@@ -46,4 +46,4 @@
 cd $NCTMP_DIR
 
 #Launch hyracks nc
-$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
+$HYRACKS_HOME/hyracks-server/target/appassembler/bin/hyracksnc -cc-host $CCHOST -cc-port $CC_CLUSTERPORT -cluster-net-ip-address $IPADDR  -data-ip-address $IPADDR -result-ip-address $IPADDR  -node-id $NODEID -iodevices "${IO_DIRS}" &> $NCLOGS_DIR/$NODEID.log &
diff --git a/pregelix-core/src/main/resources/scripts/stopnc.sh b/pregelix-core/src/main/resources/scripts/stopnc.sh
index 03ce4e7..35c4794 100644
--- a/pregelix-core/src/main/resources/scripts/stopnc.sh
+++ b/pregelix-core/src/main/resources/scripts/stopnc.sh
@@ -5,6 +5,10 @@
 PID=`ps -ef|grep ${USER}|grep java|grep 'Dapp.name=hyracksnc'|awk '{print $2}'`
 
 if [ "$PID" == "" ]; then
+  PID=`ps -ef|grep ${USER}|grep java|grep 'hyracks'|awk '{print $2}'`
+fi
+
+if [ "$PID" == "" ]; then
   USERID=`id | sed 's/^uid=//;s/(.*$//'`
   PID=`ps -ef|grep ${USERID}|grep java|grep 'Dapp.name=hyracksnc'|awk '{print $2}'`
 fi
diff --git a/pregelix-core/src/test/java/edu/uci/ics/pregelix/core/join/JoinTest.java b/pregelix-core/src/test/java/edu/uci/ics/pregelix/core/join/JoinTest.java
index a5cb6e2..3c00cad 100644
--- a/pregelix-core/src/test/java/edu/uci/ics/pregelix/core/join/JoinTest.java
+++ b/pregelix-core/src/test/java/edu/uci/ics/pregelix/core/join/JoinTest.java
@@ -103,7 +103,6 @@
         ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
         cleanupStores();
         PregelixHyracksIntegrationUtil.init();
-        PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
 
         FileUtils.forceMkdir(new File(EXPECT_RESULT_DIR));
         FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
@@ -121,7 +120,6 @@
         runIndexRightOuterJoin();
         TestUtils.compareWithResult(new File(EXPECTED_RESULT_FILE), new File(ACTUAL_RESULT_FILE));
 
-        PregelixHyracksIntegrationUtil.destroyApp(HYRACKS_APP_NAME);
         PregelixHyracksIntegrationUtil.deinit();
     }
 
diff --git a/pregelix-dataflow-std-base/pom.xml b/pregelix-dataflow-std-base/pom.xml
index caa3222..4fda45f 100644
--- a/pregelix-dataflow-std-base/pom.xml
+++ b/pregelix-dataflow-std-base/pom.xml
@@ -42,8 +42,9 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+                <version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
diff --git a/pregelix-dataflow-std/pom.xml b/pregelix-dataflow-std/pom.xml
index c5a0913..efe1607 100644
--- a/pregelix-dataflow-std/pom.xml
+++ b/pregelix-dataflow-std/pom.xml
@@ -43,8 +43,9 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+				<version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
diff --git a/pregelix-dataflow/pom.xml b/pregelix-dataflow/pom.xml
index d3f396e..2d0859b 100644
--- a/pregelix-dataflow/pom.xml
+++ b/pregelix-dataflow/pom.xml
@@ -43,8 +43,9 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+				<version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
diff --git a/pregelix-example/pom.xml b/pregelix-example/pom.xml
index e643331..84feb78 100644
--- a/pregelix-example/pom.xml
+++ b/pregelix-example/pom.xml
@@ -24,6 +24,7 @@
 			</plugin>
 			<plugin>
 				<artifactId>maven-assembly-plugin</artifactId>
+                <version>2.2-beta-5</version>
 				<configuration>
 					<descriptorRefs>
 						<descriptorRef>jar-with-dependencies</descriptorRef>
@@ -42,7 +43,7 @@
 			<plugin>
 				<groupId>org.codehaus.mojo</groupId>
 				<artifactId>appassembler-maven-plugin</artifactId>
-				<version>1.3</version>
+                <version>1.3</version>
 				<executions>
 					<execution>
 						<configuration>
@@ -79,7 +80,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+				<version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
diff --git a/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/GraphMutationVertex.java b/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/GraphMutationVertex.java
index 5773602..e54373f 100644
--- a/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/GraphMutationVertex.java
+++ b/pregelix-example/src/main/java/edu/uci/ics/pregelix/example/GraphMutationVertex.java
@@ -47,7 +47,7 @@
             if (newVertex == null) {
                 newVertex = new GraphMutationVertex();
             }
-            if (getVertexId().get() % 2 == 0) {
+            if (getVertexId().get() % 2 == 0 || getVertexId().get() % 3 == 0) {
                 deleteVertex(getVertexId());
             } else {
                 vid.set(100 * getVertexId().get());
@@ -59,7 +59,7 @@
         } else {
             if (getVertexId().get() % 190 == 0) {
                 deleteVertex(getVertexId());
-            } 
+            }
             voteToHalt();
         }
     }
diff --git a/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java b/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java
index 37f03a5..da6d564 100644
--- a/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java
+++ b/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/dataload/DataLoadTest.java
@@ -77,7 +77,6 @@
         ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
         cleanupStores();
         PregelixHyracksIntegrationUtil.init();
-        PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
         LOGGER.info("Hyracks mini-cluster started");
         startHDFS();
         FileUtils.forceMkdir(new File(EXPECT_RESULT_DIR));
@@ -112,7 +111,6 @@
     }
 
     public void tearDown() throws Exception {
-        PregelixHyracksIntegrationUtil.destroyApp(HYRACKS_APP_NAME);
         PregelixHyracksIntegrationUtil.deinit();
         LOGGER.info("Hyracks mini-cluster shut down");
         cleanupHDFS();
diff --git a/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java b/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java
index 4b4cc2e..4bf83e6 100644
--- a/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java
+++ b/pregelix-example/src/test/java/edu/uci/ics/pregelix/example/jobrun/RunJobTestSuite.java
@@ -74,7 +74,6 @@
         ClusterConfig.setClusterPropertiesPath(PATH_TO_CLUSTER_PROPERTIES);
         cleanupStores();
         PregelixHyracksIntegrationUtil.init();
-        PregelixHyracksIntegrationUtil.createApp(HYRACKS_APP_NAME);
         LOGGER.info("Hyracks mini-cluster started");
         FileUtils.forceMkdir(new File(ACTUAL_RESULT_DIR));
         FileUtils.cleanDirectory(new File(ACTUAL_RESULT_DIR));
@@ -126,7 +125,6 @@
     }
 
     public void tearDown() throws Exception {
-        PregelixHyracksIntegrationUtil.destroyApp(HYRACKS_APP_NAME);
         PregelixHyracksIntegrationUtil.deinit();
         LOGGER.info("Hyracks mini-cluster shut down");
         cleanupHDFS();
@@ -169,7 +167,7 @@
     public void run(TestResult result) {
         try {
             int testCount = countTestCases();
-            for (int i = 2; i == 2; i++) {
+            for (int i = 0; i < testCount; i++) {
                 // cleanupStores();
                 Test each = this.testAt(i);
                 if (result.shouldStop())
diff --git a/pregelix-example/src/test/resources/expected/GraphMutation.result b/pregelix-example/src/test/resources/expected/GraphMutation.result
index 3f2fd60..a30166c 100644
--- a/pregelix-example/src/test/resources/expected/GraphMutation.result
+++ b/pregelix-example/src/test/resources/expected/GraphMutation.result
@@ -1,19 +1,13 @@
 1 0.0
-3 0.0
 5 0.0
 7 0.0
-9 0.0
 11 0.0
 13 0.0
-15 0.0
 17 0.0
 19 0.0
 100 0.0
-300 0.0
 500 0.0
 700 0.0
-900 0.0
 1100 0.0
 1300 0.0
-1500 0.0
 1700 0.0
diff --git a/pregelix-runtime/pom.xml b/pregelix-runtime/pom.xml
index e75f98b..94bda18 100644
--- a/pregelix-runtime/pom.xml
+++ b/pregelix-runtime/pom.xml
@@ -42,8 +42,9 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
-				<version>2.5</version>
+				<version>2.4.1</version>
 				<configuration>
 					<filesets>
 						<fileset>
diff --git a/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCApplicationEntryPoint.java b/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCApplicationEntryPoint.java
new file mode 100644
index 0000000..fbebc66
--- /dev/null
+++ b/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCApplicationEntryPoint.java
@@ -0,0 +1,23 @@
+package edu.uci.ics.pregelix.runtime.bootstrap;
+
+import edu.uci.ics.hyracks.api.application.INCApplicationContext;
+import edu.uci.ics.hyracks.api.application.INCApplicationEntryPoint;
+import edu.uci.ics.pregelix.dataflow.context.RuntimeContext;
+
+public class NCApplicationEntryPoint implements INCApplicationEntryPoint {
+    @Override
+    public void start(INCApplicationContext ncAppCtx, String[] args) throws Exception {
+        RuntimeContext rCtx = new RuntimeContext(ncAppCtx);
+        ncAppCtx.setApplicationObject(rCtx);
+    }
+
+    @Override
+    public void notifyStartupComplete() throws Exception {
+
+    }
+
+    @Override
+    public void stop() throws Exception {
+
+    }
+}
\ No newline at end of file
diff --git a/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCBootstrapImpl.java b/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCBootstrapImpl.java
deleted file mode 100644
index 76c725e..0000000
--- a/pregelix-runtime/src/main/java/edu/uci/ics/pregelix/runtime/bootstrap/NCBootstrapImpl.java
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * 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.pregelix.runtime.bootstrap;
-
-import java.util.logging.Logger;
-
-import edu.uci.ics.hyracks.api.application.INCApplicationContext;
-import edu.uci.ics.hyracks.api.application.INCBootstrap;
-import edu.uci.ics.pregelix.dataflow.context.RuntimeContext;
-
-public class NCBootstrapImpl implements INCBootstrap {
-    private static final Logger LOGGER = Logger.getLogger(NCBootstrapImpl.class.getName());
-    private INCApplicationContext appCtx;
-
-    @Override
-    public void start() throws Exception {
-        LOGGER.info("Starting NC Bootstrap");
-        RuntimeContext rCtx = new RuntimeContext(appCtx);
-        appCtx.setApplicationObject(rCtx);
-        LOGGER.info("Initialized RuntimeContext: " + rCtx);
-    }
-
-    @Override
-    public void stop() throws Exception {
-        LOGGER.info("Stopping NC Bootstrap");
-        RuntimeContext rCtx = (RuntimeContext) appCtx.getApplicationObject();
-        rCtx.close();
-    }
-
-    @Override
-    public void setApplicationContext(INCApplicationContext appCtx) {
-        this.appCtx = appCtx;
-    }
-}
\ No newline at end of file