[rules-users] Getting Exception while running rules continuously on the Event Streams from Mule Component.

Please find attached the rule Code (.drl) below. Frequently getting this below Exception while running rules. Exception caught while executing action: org.drools.reteoo.PropagationQueuingNode$PropagateAction@41c317 java.lang.NullPointerException at org.drools.util.LeftTupleList.toArray(LeftTupleList.java:106) at org.drools.util.LeftTupleList.toArray(LeftTupleList.java:11) at org.drools.reteoo.CollectNode.assertObject(CollectNode.java:256) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:42) at org.drools.reteoo.RightInputAdapterNode.assertLeftTuple(RightInputAdapterNode.java:135) at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:117) at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:28) at org.drools.reteoo.FromNode.evaluateAndPropagate(FromNode.java:156) at org.drools.reteoo.FromNode.assertLeftTuple(FromNode.java:104) at org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:145) at org.drools.reteoo.CompositeLeftTupleSinkAdapter.propagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:39) at org.drools.reteoo.JoinNode.assertObject(JoinNode.java:175) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:42) at org.drools.reteoo.PropagationQueuingNode$AssertAction.execute(PropagationQueuingNode.java:326) at org.drools.reteoo.PropagationQueuingNode.propagateActions(PropagationQueuingNode.java:221) at org.drools.reteoo.PropagationQueuingNode$PropagateAction.execute(PropagationQueuingNode.java:394) at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1486) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:158) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:122) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:80) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:28) at org.mule.module.drools.Drools.assertEvent(Drools.java:165) at org.mule.module.bpm.Rules.handleEvent(Rules.java:131) at org.mule.module.bpm.RulesComponent.doInvoke(RulesComponent.java:84) at org.mule.component.AbstractComponent.invokeInternal(AbstractComponent.java:120) at org.mule.component.AbstractComponent.access$000(AbstractComponent.java:56) at org.mule.component.AbstractComponent$1$1.process(AbstractComponent.java:234) at org.mule.processor.chain.DefaultMessageProcessorChain.doProcess(DefaultMessageProcessorChain.java:88) at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:89) at org.mule.processor.chain.InterceptingChainLifecycleWrapper.doProcess(InterceptingChainLifecycleWrapper.java:63) at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:89) at org.mule.processor.chain.InterceptingChainLifecycleWrapper.process(InterceptingChainLifecycleWrapper.java:94) at org.mule.component.AbstractComponent.process(AbstractComponent.java:154) at org.mule.processor.AbstractInterceptingMessageProcessor.processNext(AbstractInterceptingMessageProcessor.java:93) at org.mule.interceptor.AbstractEnvelopeInterceptor.process(AbstractEnvelopeInterceptor.java:55) at org.mule.processor.AsyncInterceptingMessageProcessor.processNextTimed(AsyncInterceptingMessageProcessor.java:118) at org.mule.processor.SedaStageInterceptingMessageProcessor$SedaStageWorker.doWork(SedaStageInterceptingMessageProcessor.java:197) at org.mule.processor.SedaStageInterceptingMessageProcessor$SedaStageWorker.doRun(SedaStageInterceptingMessageProcessor.java:178) at org.mule.work.AbstractMuleEventWork.run(AbstractMuleEventWork.java:43) at org.mule.work.WorkerContext.run(WorkerContext.java:309) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) http://drools.46999.n3.nabble.com/file/n3372189/sensors.drl sensors.drl -- View this message in context: http://drools.46999.n3.nabble.com/Getting-Exception-while-running-rules-c... Sent from the Drools: User forum mailing list archive at Nabble.com.