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https://issues.apache.org/jira/browse/UIMA-5118?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jerry Cwiklik closed UIMA-5118.
-------------------------------
    Resolution: Fixed

added check for null to avoid NPE

> UIMA-AS: NPE thrown when cleaning up C++ based service
> ------------------------------------------------------
>
>                 Key: UIMA-5118
>                 URL: https://issues.apache.org/jira/browse/UIMA-5118
>             Project: UIMA
>          Issue Type: Bug
>          Components: Async Scaleout
>            Reporter: Jerry Cwiklik
>            Assignee: Jerry Cwiklik
>             Fix For: 2.9.0AS
>
>
> NPE is thrown from BaseUIMAAsynchronousEngine_impl.undeploy()
> line:
>       ((AnalysisEngineController) ctrer).getControllerLatch().release();
>  
> when a controller is an instance of UimacppServiceController. This class 
> returns null from getControllerLatch() causing NPE in the uima-as client 
> which tries to clean up after processing.
> Add check for null before attempting call to release().



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