[jboss-user] [jBPM] - Re: A question about rule task in jBPM5

Jing Zhang [http://community.jboss.org/people/zhangjing2000] created the discussion "Re: A question about rule task in jBPM5" To view the discussion, visit: http://community.jboss.org/message/592273#592273 -------------------------------------------------------------- Thanks Mauricio, I found in your example, you used a new thread to call fireUntilHalt, but it caused a NPE in my code during call to internalExecuteWorkItem method in JPAWorkItemManager. I wonder if the new thread won't able to leverage the JPA context from main thread. Exception in thread "Thread-12" org.drools.RuntimeDroolsException: Unexpected exception executing action org.jbpm.process.instance.event.DefaultSignalManager$SignalAction@1b9da92           at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1000)           at org.drools.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1044)           at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:780)           at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:756)           at org.drools.command.runtime.rule.FireUntilHaltCommand$1.run(FireUntilHaltCommand.java:50)           at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.internalExecuteWorkItem(JPAWorkItemManager.java:43)           at org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:101)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:185)           at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:150)           at org.jbpm.workflow.instance.impl.ExtendedNodeInstanceImpl.triggerCompleted(ExtendedNodeInstanceImpl.java:47)           at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:162)           at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:143)           at org.jbpm.workflow.instance.node.RuleSetNodeInstance.signalEvent(RuleSetNodeInstance.java:73)           at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:339)           at org.jbpm.process.instance.event.DefaultSignalManager.internalSignalEvent(DefaultSignalManager.java:80)           at org.jbpm.process.instance.event.DefaultSignalManager$SignalAction.execute(DefaultSignalManager.java:175)           at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:998) -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/592273#592273] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]