[jira] [Created] (UIMA-5906) UIMA-AS: Fix NPE when sending thread is interrupted

["Jerry Cwiklik (JIRA)" <de...@uima.apache.org>]

Jerry Cwiklik created UIMA-5906:
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             Summary: UIMA-AS: Fix NPE when sending thread is interrupted
                 Key: UIMA-5906
                 URL: https://issues.apache.org/jira/browse/UIMA-5906
             Project: UIMA
          Issue Type: Bug
          Components: Async Scaleout
            Reporter: Jerry Cwiklik
            Assignee: Jerry Cwiklik
             Fix For: 2.10.4AS


A user reported the following scenario:

when sendAndReceiveCas() of an AS Engine is Thread.interrupt()-ed it can happen that the ActiveMQMessageSender does not have a cacheEntry of the CAS that's sending the request anymore [1] for that a warning is logged.
However directly after that the cacheEntry is deferenced leading to a NPE [2].
This exception will then be swallowed by BaseMessageSender [3] and the process will be retried [4].

This behavior is rather unfortunate.
It would be benefitial to add a null check at [2] that the cacheEntry is there before accessing ist. Also at [3] instead of swallowing all exceptions they should be logged at debug level.

 



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