diff --git a/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/ConnectorPolicyAssignmentPolicy.java b/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/ConnectorPolicyAssignmentPolicy.java
index ca56bb6..950edce 100644
--- a/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/ConnectorPolicyAssignmentPolicy.java
+++ b/pregelix-dataflow/src/main/java/edu/uci/ics/pregelix/dataflow/ConnectorPolicyAssignmentPolicy.java
@@ -3,9 +3,9 @@
  * 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.
@@ -22,18 +22,17 @@
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicy;
 import edu.uci.ics.hyracks.api.dataflow.connectors.IConnectorPolicyAssignmentPolicy;
 import edu.uci.ics.hyracks.api.dataflow.connectors.PipeliningConnectorPolicy;
-import edu.uci.ics.hyracks.api.dataflow.connectors.SendSideMaterializedBlockingConnectorPolicy;
 import edu.uci.ics.hyracks.api.dataflow.connectors.SendSideMaterializedPipeliningConnectorPolicy;
+import edu.uci.ics.hyracks.api.dataflow.connectors.SendSidePipeliningReceiveSideMaterializedBlockingConnectorPolicy;
 import edu.uci.ics.hyracks.api.job.JobSpecification;
 import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexInsertUpdateDeleteOperatorDescriptor;
 
 public class ConnectorPolicyAssignmentPolicy implements IConnectorPolicyAssignmentPolicy {
     private static final long serialVersionUID = 1L;
-    private IConnectorPolicy senderSideMatPipPolicy = new SendSideMaterializedPipeliningConnectorPolicy();
-    //private IConnectorPolicy senderSidePipeliningReceiverSideMatBlkPolicy = new SendSidePipeliningReceiveSideMaterializedBlockingConnectorPolicy();
-    private IConnectorPolicy senderSidePipeliningReceiverSideMatBlkPolicy = new SendSideMaterializedBlockingConnectorPolicy();
-    private IConnectorPolicy pipeliningPolicy = new PipeliningConnectorPolicy();
-    private JobSpecification spec;
+    private final IConnectorPolicy senderSideMatPipPolicy = new SendSideMaterializedPipeliningConnectorPolicy();
+    private final IConnectorPolicy senderSidePipeliningReceiverSideMatBlkPolicy = new SendSidePipeliningReceiveSideMaterializedBlockingConnectorPolicy();
+    private final IConnectorPolicy pipeliningPolicy = new PipeliningConnectorPolicy();
+    private final JobSpecification spec;
 
     public ConnectorPolicyAssignmentPolicy(JobSpecification spec) {
         this.spec = spec;