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https://issues.apache.org/jira/browse/UIMA-1540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12751339#action_12751339
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Tommaso Teofili commented on UIMA-1540:
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Perhaps private static class CasQueueEntry should be refactored to implement
Runnable and launched by a ThreadPool.
> Uima AS client consumes too much CPU while waiting for a free CAS
> ------------------------------------------------------------------
>
> Key: UIMA-1540
> URL: https://issues.apache.org/jira/browse/UIMA-1540
> Project: UIMA
> Issue Type: Bug
> Components: Async Scaleout
> Affects Versions: 2.2.2AS
> Reporter: Jerry Cwiklik
> Assignee: Jerry Cwiklik
> Fix For: 2.3AS
>
>
> The UIMA AS client enters a busy loop in the getCAS() in
> BaseUIMAAsynchronousEngineCommon_impl. Since a CAS instance may not be
> available for awhile, this code wastes CPU cycles by continuously testing for
> null and trying again. Put the thread to sleep for some time before testing
> for CAS availability again.
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