[jboss-user] [jBPM] - Cannot make Evaluation example work consistently in Eclipse

Tue Apr 2 07:02:50 EDT 2013

Andy McC [https://community.jboss.org/people/andymcc] created the discussion

"Cannot make Evaluation example work consistently in Eclipse"

To view the discussion, visit: https://community.jboss.org/message/805968#805968

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Hi, 

Although I'm a newbie, please be assured that I've tried to resolve this one before posting, but it looks like others have hit similar issues in the past ( https://community.jboss.org/message/750417#750417 https://community.jboss.org/message/750417#75041).

I'm seeing the same issue on two different machines, one running Windows 7 the other Windows 8, both running Java SE runtime 1.7.0_17-b02.

I'm running the example "straight out of the box" without any modifications. Here's what I'm seeing:
* I've installed jBPM_5.4.0_final and Eclipse Helios as per the installation documentation.
* In Eclipse, I run the Evaluation example in Debug with a breakpoint at the +logger.close()+ instruction, and complete all the krisv, john and mary tasks.
* In Eclipse, I then press the green arrow in the Debug session to complete the execution.
* All good so far.
* However, if I immediately try to rerun the Evaluation example, there is a pause and I see the following in the console window (apologies for the formatting!):

| 1 | 02/04 11:23:07,519[main] ERROR workitem.wsht.GenericHTWorkItemHandler.executeWorkItem  - Tue Apr 02 11:23:07 BST 2013: Error when creating task on task server for work item id 1. Error reported by task server: Task operation request timed out |
java.lang.RuntimeException: Task operation request timed out
|  | at org.jbpm.task.service.SyncTaskServiceWrapper.addTask(SyncTaskServiceWrapper.java:118) |
|  | at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler.executeWorkItem(GenericHTWorkItemHandler.java:182) |
|  | at org.drools.process.instance.impl.DefaultWorkItemManager.internalExecuteWorkItem(DefaultWorkItemManager.java:70) |
|  | at org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:107) |
|  | at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126) |
|  | at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:279) |
|  | at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:238) |
|  | at org.jbpm.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:49) |
|  | at org.jbpm.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:41) |
|  | at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:126) |
|  | at org.jbpm.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:35) |
|  | at org.jbpm.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:194) |
|  | at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:309) |
|  | at org.jbpm.process.instance.ProcessRuntimeImpl.startProcessInstance(ProcessRuntimeImpl.java:170) |
|  | at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:140) |
|  | at org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1098) |
|  | at org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:320) |
|  | at com.sample.ProcessTest.main(ProcessTest.java:32) |
| 
 | Process started ... |

The only way I've found to resolve this is to restart Jboss which I'm sure isn't the intended way.

Here's what I've tried/noticed
* I've tried inserting a ksession.dispose() after the logger.close() but this does not appear to clear the issue.
* I've "clean"ed the Eclipse project and restarted the debug session.
* I've noticed that the memory occupancy 
* When the ProcessTest has apparently completed, the Eclipse session still appears to have several threads that keep running (see below)

| com.sample.ProcessTest at localhost:51000 |  |
|  | Daemon Thread [Old I/O client worker (channelId: 2149714, /127.0.0.1:51002 => /127.0.0.1:5153)] (Running) |  |
|  | Daemon Thread [Thread-0 (HornetQ-client-global-scheduled-threads-22781537)] (Running) |  |
|  | Daemon Thread [Thread-1 (HornetQ-client-global-scheduled-threads-22781537)] (Running) |  |
|  | Thread [Thread-2] (Running) |  |
|  | Daemon Thread [Thread-2 (HornetQ-client-global-scheduled-threads-22781537)] (Running) |  |
|  | Daemon Thread [Thread-3 (HornetQ-client-global-scheduled-threads-22781537)] (Running) |  |
|  | Daemon Thread [Thread-4 (HornetQ-client-global-scheduled-threads-22781537)] (Running) |  |
|  | Thread [DestroyJavaVM] (Running) |  |

Can anyone shed any light on what might be going wrong here? I'm keen to get moving with jBPM but I'd really like to be confident that I can get the examples working realiably before using Eclipse as my test environment.

Many thanks!

Andy McC
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