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https://issues.apache.org/jira/browse/UIMA-2078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13011255#comment-13011255
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Marshall Schor commented on UIMA-2078:
--------------------------------------
After some discussion on the mailing list, the right fix seems to be to have
non-shared UIMA-Contexts (to make Cas Multipliers work) but to have a shared
Resource Manager (to preserve the capability to share large external resources
among the multiple instances). With this design, each instance ought to have
its own cas pool (for cas Multipliers).
> Fix intermittent problem with CAS release while running scaled up AE in UIMA
> AS
> --------------------------------------------------------------------------------
>
> Key: UIMA-2078
> URL: https://issues.apache.org/jira/browse/UIMA-2078
> Project: UIMA
> Issue Type: Bug
> Components: Async Scaleout, Core Java Framework
> Reporter: Jerry Cwiklik
> Assignee: Marshall Schor
> Fix For: 2.3.2SDK
>
>
> While running extended tests on Mac, the testScaledSyncAggregateProcess()
> test failed with:
> org.apache.uima.analysis_engine.AnalysisEngineProcessException:
> CasManager.release(CAS) was called with a CAS that does not belong to this
> CasManager.\
> at
> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(ASB_impl.java:701)\
> at
> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(ASB_impl.java:409)\
> at
> org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(ASB_impl.java:342)\
> at
> org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(AggregateAnalysisEngine_impl.java:267)\
> at
> org.apache.uima.aae.controller.PrimitiveAnalysisEngineController_impl.process(PrimitiveAnalysisEngineController_impl.java:514)\
> at
> org.apache.uima.aae.handler.HandlerBase.invokeProcess(HandlerBase.java:121)\
> at
> org.apache.uima.aae.handler.input.ProcessRequestHandler_impl.handleProcessRequestFromRemoteClient(ProcessRequestHandler_impl.java:474)\
> at
> org.apache.uima.aae.handler.input.ProcessRequestHandler_impl.handle(ProcessRequestHandler_impl.java:952)\
> at
> org.apache.uima.aae.handler.input.MetadataRequestHandler_impl.handle(MetadataRequestHandler_impl.java:78)\
> at
> org.apache.uima.adapter.jms.activemq.JmsInputChannel.onMessage(JmsInputChannel.java:702)\
> at
> org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:535)\
> at
> org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:495)\
> at
> org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:467)\
> at
> org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:323)\
> at
> org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:261)\
> at
> org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1056)\
> at
> org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:952)\
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)\
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)\
> at
> org.apache.uima.aae.UimaAsThreadFactory$1.run(UimaAsThreadFactory.java:106)\
> at java.lang.Thread.run(Thread.java:680)\
> Caused by: org.apache.uima.UIMARuntimeException: CasManager.release(CAS) was
> called with a CAS that does not belong to this CasManager.\
> at
> org.apache.uima.resource.impl.CasManager_impl.releaseCas(CasManager_impl.java:131)\
> at
> org.apache.uima.cas.AbstractCas_ImplBase.release(AbstractCas_ImplBase.java:35)\
> at org.apache.uima.cas.impl.CASImpl.release(CASImpl.java:3604)\
> at org.apache.uima.cas.impl.CASImpl.release(CASImpl.java:3602)\
> at
> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(ASB_impl.java:689)\
> The above test deploys 5 instances of synchronous aggregate containing a CM
> and a NoOp Annotator. The CM generates 1 CAS for each input CAS. Total of 5
> CASes are sent to the service for processing. Some of the CASes are processed
> and returned back to the client. I am not totally sure what the problem is at
> this time. It seems like the ASB is trying to release a child CAS when the
> above exception occurs. All instances of sync aggregates share Resource
> Manager containing common CasManager. Unable to reproduce this problem on
> Linux, Windows or Mac.
> Further diagnosis points toward an issue with the UIMA Java SDK, for use
> cases where multiple instances of an aggregate (containing a Cas Multiplier)
> are created and run using a shared common UIMA Context / Resource Manager.
> Several parts of the Resource Manager are not thread safe.
> Figure out where things like getEmptyCas need to be synchronized.
> Come up with a better test case (that isn't so intermittent).
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