diff --git a/src/main/java/altk/comm/engine/Broadcast.java b/src/main/java/altk/comm/engine/Broadcast.java
index 7fccefa..4e861e3 100644
--- a/src/main/java/altk/comm/engine/Broadcast.java
+++ b/src/main/java/altk/comm/engine/Broadcast.java
@@ -81,7 +81,7 @@ public abstract class Broadcast
 	private Integer transactions;
 	
 	/** Instantaneous number of jobs being serviced by service provider */
-	private Integer serviceActivityCount;
+	private int serviceActivityCount;
 	
 	/** Running count of successful jobs */
 	private int successCount;
@@ -1159,6 +1159,7 @@ public abstract class Broadcast
 	 * @param batch
 	 * @param prerequisites 
 	 * @return int - number of transactions employed to service these jobs.
+	 * @throw Exception to abort broadcast
 	 */
 	abstract protected int processJobs(List<Job> batch, Object serviceProvider, ServicePrerequisites prerequisites)
 	        throws EngineException;
@@ -1175,7 +1176,7 @@ public abstract class Broadcast
     
     protected void updateServiceActivityCount(int increment)
     {
-    	synchronized (serviceActivityCount)
+    	synchronized (readyQueue)
     	{
 	    	serviceActivityCount += increment;
 	    	if (increment < 0 && serviceActivityCount <= 0)
@@ -1340,7 +1341,10 @@ public abstract class Broadcast
 
     public int getCompletedJobCount()
     {
+    	synchronized(readyQueue)
+    	{
     		return jobsTotal - getRemainingJobCount() - serviceActivityCount;
+    	}
     }
 
 	public String getBroadcastType() {