[jira] Reopened: (UIMA-1477) UIMA AS client hangs while handling CPC request

["Jerry Cwiklik (JIRA)" <ui...@incubator.apache.org>]

     [ https://issues.apache.org/jira/browse/UIMA-1477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jerry Cwiklik reopened UIMA-1477:
---------------------------------


The hang is still happening in the UIMA AS client when calling collectionProcessComplete()

> UIMA AS client hangs while handling CPC request 
> ------------------------------------------------
>
>                 Key: UIMA-1477
>                 URL: https://issues.apache.org/jira/browse/UIMA-1477
>             Project: UIMA
>          Issue Type: Bug
>          Components: Async Scaleout
>            Reporter: Jerry Cwiklik
>            Assignee: Jerry Cwiklik
>
> When UIMA AS client is initialized it acquires a CPC semaphore to control when to send a CPC request. The semaphore is released when a number of CASes sent equals a number of CASes received. Only when equal the semaphore is released and the CPC request is allowed to be sent. 
> In a case when a client is initialized but never sends any CASes this logic fails. The semaphore is never released causing a hang while trying to acquire a semaphore in collectionProcessComplete().
> Add a new test case to replicate the problem.
> Fix the code to handle sending CPC from a client that doesnt send CASes to a service.

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