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From "Jerry Cwiklik (JIRA)" <uima-...@incubator.apache.org>
Subject [jira] Closed: (UIMA-1751) Fix NPE while looking up MessageProducer
Date Fri, 26 Mar 2010 15:46:28 GMT

     [ https://issues.apache.org/jira/browse/UIMA-1751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jerry Cwiklik closed UIMA-1751.

    Resolution: Fixed

Modified getMessageProducer() in ActiveMQMessageSender to check the state of the engine before
returning the Producer. 

> Fix NPE while looking up MessageProducer
> ----------------------------------------
>                 Key: UIMA-1751
>                 URL: https://issues.apache.org/jira/browse/UIMA-1751
>             Project: UIMA
>          Issue Type: Bug
>          Components: Async Scaleout
>    Affects Versions: 2.3AS
>            Reporter: Jerry Cwiklik
> ActiveMQMessageSender throws NPE in getMessageProducer() sometimes when the UIMA AS client
is stopping. A race condition seems to be the cause. A thread doing a send tries to dereference
engine object after the engine was forced to stop.  

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