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

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

     [ https://issues.apache.org/jira/browse/UIMA-5906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jerry Cwiklik closed UIMA-5906.
-------------------------------
    Resolution: Fixed

Fixes cause of NPE. Also added logging when there is an exception

> 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
>            Priority: Major
>             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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