Re: [rules-users] An issue when Droools fusion is run in the stream mode with 'multithreadEvaluation'

Hi all I have encountered an issue when Droools fusion is run in the stream mode with 'multithreadEvaluation' and maxThreads=5. The issue is as follows. org.drools. RuntimeDroolsException: Unexpected exception executing action org.drools.reteoo.PropagationQueuingNode$PropagateAction@8c1400 at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1549) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:160) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:121) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:80) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:28) ......... Caused by: org.drools.RuntimeDroolsException: java.lang.NullPointerException at org.drools.rule.Accumulate.accumulate(Accumulate.java:172) at org.drools.reteoo.AccumulateNode.modifyTuple(AccumulateNode.java:424) at org.drools.reteoo.AccumulateNode.assertObject(AccumulateNode.java:284) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:42) at org.drools.reteoo.PropagationQueuingNode$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:1547) ... 18 more Caused by: java.lang.NullPointerException at org.drools.base.accumulators.MVELAccumulatorFunctionExecutor.accumulate(MVELAccumulatorFunctionExecutor.java:129) at org.drools.rule.Accumulate.accumulate(Accumulate.java:164) ... 25 more Then NPE is due to the argument 'context' of the accumulate is null. When I run the fusion in the same scenario without 'multithreadEvaluation' , it works fine. Could someone help me to identify the actual issue? Thanks Lots Indika Please Note : I did not inject events concurrently. But , I need to do that too _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users