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Loading processInstance/session via JPA, workItem executes before able to register workItems
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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/627859#627859">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hey guys,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I've got a process that I run the 1st half until it hits a timer, at which time I persist the process instances to the DB.  This portion works fine.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When retrieving the sessions, I find (based on stack exceptions & debugging) JBPM calls JPAWorkItemManager.internalExecuteWorkItem before I can register my workItemHandlers.  </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Right now I'm calling JPAKnowledgeService.loadStatefulKnowledgeSession, and immediately after calling ksession.getWorkItemManager().registerWorkItemHandler, but it seems like some kind of race condition occurs and the engine wants to execute immediately upon loading from the database.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Has anyone else run into this problem before?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>org.drools.RuntimeDroolsException: Unexpected exception executing action org.jbpm.process.instance.event.DefaultSignalManager$SignalProcessInstanceAction@4b04cf88</p><p> at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:996)</p><p> at org.drools.impl.StatefulKnowledgeSessionImpl.executeQueuedActions(StatefulKnowledgeSessionImpl.java:845)</p><p> at org.jbpm.process.instance.event.DefaultSignalManager.signalEvent(DefaultSignalManager.java:89)</p><p> at org.jbpm.process.instance.timer.TimerManager$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: org.drools.WorkItemHandlerNotFoundException: Could not find work item handler for SendEmail</p><p> at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.throwWorkItemNotFoundException(JPAWorkItemManager.java:60)</p><p> at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.internalExecuteWorkItem(JPAWorkItemManager.java:55)</p><p> at org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:105)</p><p> at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122)</p><p> at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:185)</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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