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From "Jerry Cwiklik (JIRA)" <uima-...@incubator.apache.org>
Subject [jira] Closed: (UIMA-1255) Modify UIMA-AS Aggregate to Handle Cas Not Found Error
Date Mon, 02 Feb 2009 21:53:59 GMT

     [ https://issues.apache.org/jira/browse/UIMA-1255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jerry Cwiklik closed UIMA-1255.

    Resolution: Fixed

> Modify UIMA-AS Aggregate to Handle Cas Not Found Error
> ------------------------------------------------------
>                 Key: UIMA-1255
>                 URL: https://issues.apache.org/jira/browse/UIMA-1255
>             Project: UIMA
>          Issue Type: Bug
>          Components: Async Scaleout
>            Reporter: Jerry Cwiklik
>         Attachments: uimaj-as-activemq-UIMA-1255-patch.txt, uimaj-as-core-UIMA-1255-patch.txt
> Catch Cas Not Found exception in the finalStep(), log it and return. This exception can
occur when one thread is processing a child of an input CAS in parallel with another thread
processing a second child of the same CAS. The first thread may remove the input CAS before
the second thread completes.
> When this happens, the second thread eventually will try to fetch the input CAS but by
that time the CAS no longer exists. An exception is thrown and send through the error handler
which reports it to a client. This exception should be handled by the aggregate and not sent
to the client.

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