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Re: Problem in a process with a event-based timer and JPAWorkingMemoryDbLogger
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created by <a href="http://community.jboss.org/people/rrpeterson">Ryan Peterson</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/627274#627274">View the full discussion</a>
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<div class="jive-rendered-content"><p>I'm getting this same exception.  I create 5 instances of a process.  Mid-point in the process I have a timer, and things are run/persisted properly until the timer is reached.  At this point control is returned to the caller, which waits for some time until re-aquiring the session instances (via JPAKnowledgeService.loadStatefulKnowledgeSession(w, x, y, z)) and fireUntilHalt() is called on the ksession.  At this point, an intermittent # of my remaining process instances will execute properly (maybe 2 out of 5), and the remaining fail with the following exception:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Hibernate: select processins0_.InstanceId as InstanceId121_0_, processins0_.lastModificationDate as lastModi2_121_0_, processins0_.lastReadDate as lastRead3_121_0_, processins0_.processId as processId121_0_, processins0_.processInstanceByteArray as processI5_121_0_, processins0_.startDate as startDate121_0_, processins0_.state as state121_0_, processins0_.OPTLOCK as OPTLOCK121_0_ from ProcessInstanceInfo processins0_ where processins0_.InstanceId=?</p><p>org.drools.RuntimeDroolsException: Unexpected exception executing action org.jbpm.process.instance.event.DefaultSignalManager$SignalProcessInstanceAction@3f1dae99</p><p> at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:996)</p><p> at org.drools.impl.StatefulKnowledgeSessionImpl.executeQueuedActions(StatefulKnowledgeSessionImpl.java:845)</p><p> at org.jbpm.process.instance.event.DefaultSignalManager.signalEvent(DefaultSignalManager.java:89)</p><p> at org.jbpm.process.instance.timer.TimerManager$ProcessJob.execute(TimerManager.java:164)</p><p> at org.drools.time.impl.JDKTimerService$JDKCallableJob.call(JDKTimerService.java:151)</p><p> at org.drools.persistence.jpa.JpaJDKTimerService$JpaJDKCallableJob.internalCall(JpaJDKTimerService.java:80)</p><p> at org.drools.persistence.jpa.JpaJDKTimerService$JpaJDKCallableJob.access$100(JpaJDKTimerService.java:63)</p><p> at org.drools.persistence.jpa.JpaJDKTimerService$JDKCallableJobCommand.execute(JpaJDKTimerService.java:96)</p><p> at org.drools.persistence.jpa.JpaJDKTimerService$JDKCallableJobCommand.execute(JpaJDKTimerService.java:84)</p><p> at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:292)</p><p> at org.drools.persistence.jpa.JpaJDKTimerService$JpaJDKCallableJob.call(JpaJDKTimerService.java:75)</p><p> at org.drools.persistence.jpa.JpaJDKTimerService$JpaJDKCallableJob.call(JpaJDKTimerService.java:63)</p><p> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)</p><p> at java.util.concurrent.FutureTask.run(FutureTask.java:138)</p><p> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)</p><p> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206)</p><p> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)</p><p> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)</p><p> at java.lang.Thread.run(Thread.java:662)</p><p>Caused by: java.lang.NullPointerException</p><p> at org.jbpm.process.audit.JPAWorkingMemoryDbLogger.getEntityManager(JPAWorkingMemoryDbLogger.java:131)</p><p> at org.jbpm.process.audit.JPAWorkingMemoryDbLogger.addNodeExitLog(JPAWorkingMemoryDbLogger.java:118)</p><p> at org.jbpm.process.audit.JPAWorkingMemoryDbLogger.logEventCreated(JPAWorkingMemoryDbLogger.java:80)</p><p> at org.drools.audit.WorkingMemoryLogger.filterLogEvent(WorkingMemoryLogger.java:196)</p><p> at org.drools.audit.WorkingMemoryLogger.beforeNodeLeft(WorkingMemoryLogger.java:506)</p><p> at org.drools.event.ProcessEventSupport.fireBeforeNodeLeft(ProcessEventSupport.java:112)</p><p> at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:162)</p><p> at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:150)</p><p> at org.jbpm.workflow.instance.impl.ExtendedNodeInstanceImpl.triggerCompleted(ExtendedNodeInstanceImpl.java:47)</p><p> at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:162)</p><p> at org.jbpm.workflow.instance.node.TimerNodeInstance.triggerCompleted(TimerNodeInstance.java:135)</p><p> at org.jbpm.workflow.instance.node.TimerNodeInstance.signalEvent(TimerNodeInstance.java:125)</p><p> at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:333)</p><p> at org.jbpm.process.instance.event.DefaultSignalManager$SignalProcessInstanceAction.execute(DefaultSignalManager.java:117)</p><p> at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:994)</p><p> ... 18 more</p></div>
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