diff --git a/dbcon/joblist/primitivestep.h b/dbcon/joblist/primitivestep.h
index 9c24548e3..be4e5cee0 100644
--- a/dbcon/joblist/primitivestep.h
+++ b/dbcon/joblist/primitivestep.h
@@ -1099,7 +1099,7 @@ private:
     uint32_t fExtentsPerSegFile;//config num of Extents Per Segment File
     boost::shared_ptr<boost::thread> cThread;  //consumer thread
 	boost::shared_ptr<boost::thread> pThread;  //producer thread
-	boost::mutex mutex;
+	boost::mutex tplMutex;
 	boost::mutex dlMutex;
 	boost::mutex cpMutex;
 	boost::mutex serializeJoinerMutex;
diff --git a/dbcon/joblist/tuple-bps.cpp b/dbcon/joblist/tuple-bps.cpp
index 023a0b72d..adb2c5d82 100644
--- a/dbcon/joblist/tuple-bps.cpp
+++ b/dbcon/joblist/tuple-bps.cpp
@@ -1147,9 +1147,9 @@ void TupleBPS::join()
 	{
 		if (msgsRecvd < msgsSent) {
 			// wake up the sending thread, it should drain the input dl and exit
-			mutex.lock();
+            boost::unique_lock<boost::mutex> tplLock(tplMutex);
 			condvarWakeupProducer.notify_all();
-			mutex.unlock();
+            tplLock.unlock();
 		}
 
 		if (pThread)
@@ -1291,21 +1291,22 @@ void TupleBPS::interleaveJobs(vector<Job> *jobs) const
 void TupleBPS::sendJobs(const vector<Job> &jobs)
 {
 	uint32_t i;
+	boost::unique_lock<boost::mutex> tplLock(tplMutex, boost::defer_lock);
 
 	for (i = 0; i < jobs.size() && !cancelled(); i++) {
 		//cout << "sending a job for dbroot " << jobs[i].dbroot << ", PM " << jobs[i].connectionNum << endl;
 		fDec->write(uniqueID, *(jobs[i].msg));
-		mutex.lock();
+		tplLock.lock();
 		msgsSent += jobs[i].expectedResponses;
 		if (recvWaiting)
 			condvar.notify_all();
 		while ((msgsSent - msgsRecvd > fMaxOutstandingRequests << LOGICAL_EXTENT_CONVERTER)
 				&& !fDie) {
 			sendWaiting = true;
-			condvarWakeupProducer.wait(mutex);
+			condvarWakeupProducer.wait(tplLock);
 			sendWaiting = false;
 		}
-		mutex.unlock();
+        tplLock.unlock();
 	}
 }
 
@@ -1695,10 +1696,10 @@ void TupleBPS::sendPrimitiveMessages()
 	}
 
 abort:
-	mutex.lock();
+	boost::unique_lock<boost::mutex> tplLock(tplMutex);
 	finishedSending = true;
 	condvar.notify_all();
-	mutex.unlock();
+    tplLock.unlock();
 }
 
 struct _CPInfo {
@@ -1763,6 +1764,7 @@ void TupleBPS::receiveMultiPrimitiveMessages(uint32_t threadID)
 	StepTeleStats sts;
 	sts.query_uuid = fQueryUuid;
 	sts.step_uuid = fStepUuid;
+	boost::unique_lock<boost::mutex> tplLock(tplMutex, boost::defer_lock);
 
 try
 {
@@ -1853,13 +1855,13 @@ try
 #endif
 	}
 
-	mutex.lock();
+	tplLock.lock();
 
 	while (1) {
 		// sync with the send side
 		while (!finishedSending && msgsSent == msgsRecvd) {
 			recvWaiting++;
-			condvar.wait(mutex);
+			condvar.wait(tplLock);
 			recvWaiting--;
 		}
 
@@ -1920,13 +1922,13 @@ try
 			break;
 		}
 		if (size == 0) {
-			mutex.unlock();
+			tplLock.unlock();
 			usleep(2000 * fNumThreads);
-			mutex.lock();
+			tplLock.lock();
 			continue;
 		}
 
-		mutex.unlock();
+		tplLock.unlock();
 
 // 		cout << "thread " << threadID << " has " << size << " Bytestreams\n";
 		for (i = 0; i < size && !cancelled(); i++) {
@@ -1938,7 +1940,7 @@ try
 			if (bs->length() == 0 || hdr->Status > 0)
 			{
 				/* PM errors mean this should abort right away instead of draining the PM backlog */
-				mutex.lock();
+				tplLock.lock();
 				if (bs->length() == 0)
 				{
 					errorMessage(IDBErrorInfo::instance()->errorMsg(ERR_PRIMPROC_DOWN));
@@ -2129,7 +2131,7 @@ try
 		}
 		cpv.clear();
 
-		mutex.lock();
+		tplLock.lock();
 
 		if (fOid >= 3000)
 		{
@@ -2162,7 +2164,7 @@ out:
 	if (++recvExited == fNumThreads) {
 
 		if (doJoin && smallOuterJoiner != -1 && !cancelled()) {
-			mutex.unlock();
+			tplLock.unlock();
 			/* If this was a left outer join, this needs to put the unmatched
 			   rows from the joiner into the output
 			   XXXPAT: This might be a problem if later steps depend
@@ -2220,7 +2222,7 @@ out:
 				else
 					rgDataToDl(joinedData, local_outputRG, dlp);
 			}
-			mutex.unlock();
+			tplLock.lock();
 		}
 
 		if (traceOn() && fOid>=3000) {
@@ -2245,7 +2247,7 @@ out:
 				BPPIsAllocated = false;
 			}
 		}
-		// catch and do nothing. Let it continues with the clean up and profiling
+		// catch and do nothing. Let it continue with the clean up and profiling
 		catch (const std::exception& e)
 		{
 			cerr << "tuple-bps caught: " << e.what() << endl;
@@ -2268,7 +2270,7 @@ out:
 	fPhysicalIO += physIO_Thread;
 	fCacheIO += cachedIO_Thread;
 	fBlockTouched += touchedBlocks_Thread;
-	mutex.unlock();
+	tplLock.unlock();
 
 	if (fTableOid >= 3000 && lastThread)
 	{