TEIID30019 Unexpected exception for request kfhsdoaNXYfM.1: java.lang.NullPointerException

We are getting this exception during continious execution. Looks like client cancelling the execution

16:13:16,171 ERROR [org.teiid.PROCESSOR] (Worker6_QueryProcessorQueue902) TEIID30019 Unexpected exception for request kfhsdoaNXYfM.1: java.lang.NullPointerException
at org.teiid.dqp.internal.process.RequestWorkItem.sendResultsIfNeeded(RequestWorkItem.java:753)
at org.teiid.dqp.internal.process.RequestWorkItem$1.flushBatchDirect(RequestWorkItem.java:557)
at org.teiid.query.processor.BatchCollector.flushBatch(BatchCollector.java:191)
at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:166)
at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:382)
at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:291)
at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:49)
at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:219)
at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:249)
at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:123)
at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:298)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_03]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_03]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_03]