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From "Jerry Cwiklik (JIRA)" <...@uima.apache.org>
Subject [jira] Created: (UIMA-1797) UIMA AS processParentLast logic is not working correctly
Date Tue, 01 Jun 2010 19:32:37 GMT
UIMA AS processParentLast logic is not working correctly
--------------------------------------------------------

                 Key: UIMA-1797
                 URL: https://issues.apache.org/jira/browse/UIMA-1797
             Project: UIMA
          Issue Type: Bug
          Components: Async Scaleout
    Affects Versions: 2.3AS
            Reporter: Jerry Cwiklik
            Assignee: Jerry Cwiklik


UIMA AS aggregate fails with NPE when using multiple CMs  configured with processParentLast=true.
The aggregate throws this:
java.lang.NullPointerException
        at org.apache.uima.aae.controller.AggregateAnalysisEngineController_impl.forceToDropTheCas(AggregateAnalysisEngineController_impl.java:1822)
        at org.apache.uima.aae.controller.AggregateAnalysisEngineController_impl.finalStep(AggregateAnalysisEngineController_impl.java:1624)
        at org.apache.uima.aae.controller.AggregateAnalysisEngineController_impl.finalStep(AggregateAnalysisEngineController_impl.java:1714)
        at org.apache.uima.aae.controller.AggregateAnalysisEngineController_impl.executeFlowStep(AggregateAnalysisEngineController_impl.java:2175)
        at org.apache.uima.aae.controller.AggregateAnalysisEngineController_impl.process(AggregateAnalysisEngineController_impl.java:1207)
        at org.apache.uima.aae.handler.HandlerBase.invokeProcess(HandlerBase.java:118)
        at org.apache.uima.aae.handler.input.ProcessResponseHandler.cancelTimerAndProcess(ProcessResponseHandler.java:108)
        at org.apache.uima.aae.handler.input.ProcessResponseHandler.handleProcessResponseWithCASReference(ProcessResponseHandler.java:383)
        at org.apache.uima.aae.handler.input.ProcessResponseHandler.handle(ProcessResponseHandler.java:647)
        at org.apache.uima.aae.handler.HandlerBase.delegate(HandlerBase.java:149)
        at org.apache.uima.aae.handler.input.ProcessRequestHandler_impl.handle(ProcessRequestHandler_impl.java:989)
        at org.apache.uima.aae.spi.transport.vm.UimaVmMessageListener.onMessage(UimaVmMessageListener.java:107)
        at org.apache.uima.aae.spi.transport.vm.UimaVmMessageDispatcher$1.run(UimaVmMessageDispatcher.java:70)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)

It does not matter if CMs are colocated or remote. If there is more than one CM with processParentLast=true,
the code fails as above. The failure seems to occur while processing parent of the last child
CAS.





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