[jboss-dev-forums] [jBPM Development] - Unable to mark a task completed when running the task in a separate thread

[Connie Yang]

Connie Yang [http://community.jboss.org/people/connie.yang] created the discussion

"Unable to mark a task completed when running the task in a separate thread"

To view the discussion, visit: http://community.jboss.org/message/612820#612820

--------------------------------------------------------------
Hi,

I have a WorkItemHandler that can run the service task either in the main thread or in a separate thread.  This is my way of handling for-each parallel (aka fanout).  When the service task is run in a separate thread, I have been experiencing a NullPointerException with the following stack trace upon marking the task completed (via NodeInstanceImpl.triggerCompleted).  What am I missing?

1. java.lang.NullPointerException
      at org.jbpm.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:67)
      at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.getWorkflowProcess(WorkflowProcessInstanceImpl.java:180)
      at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.getNodeContainer(WorkflowProcessInstanceImpl.java:68)
      at org.jbpm.workflow.instance.impl.NodeInstanceImpl.getNode(NodeInstanceImpl.java:100)
      at org.jbpm.workflow.instance.node.ActionNodeInstance.getActionNode(ActionNodeInstance.java:35)
      at org.jbpm.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:43)
      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.WorkItemNodeInstance.triggerCompleted(WorkItemNodeInstance.java:239)
      at org.jbpm.workflow.instance.node.WorkItemNodeInstance.workItemCompleted(WorkItemNodeInstance.java:301)
      at org.jbpm.workflow.instance.node.WorkItemNodeInstance.signalEvent(WorkItemNodeInstance.java:277)
      at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:333)
      at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:117)
      at com.ebay.cloud.orchest.jbpm.LcmPojoWorkItemHandler$1.run(LcmPojoWorkItemHandler.java:95)
      at com.ebay.kernel.executor.TaskExecutor$Adapter.call(TaskExecutor.java:587)

Thanks in advance!
Connie
--------------------------------------------------------------

Reply to this message by going to Community
[http://community.jboss.org/message/612820#612820]

Start a new discussion in jBPM Development at Community
[http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2035]

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/jboss-dev-forums/attachments/20110630/99a9b1d6/attachment.html