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https://issues.apache.org/jira/browse/UIMA-1786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marshall Schor updated UIMA-1786:
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Fix Version/s: 2.3.1AS
> UIMA AS aggregate CM hangs due to client not sending Free Cas Request
> ---------------------------------------------------------------------
>
> Key: UIMA-1786
> URL: https://issues.apache.org/jira/browse/UIMA-1786
> Project: UIMA
> Issue Type: Bug
> Components: Async Scaleout
> Affects Versions: 2.3AS
> Reporter: Jerry Cwiklik
> Assignee: Jerry Cwiklik
> Fix For: 2.3.1AS
>
>
> The UIMA AS client is not handling expired CASes coming from a Cas Multiplier
> aggregate.The scenario leading to a problem is as follows:
> The aggregate CM is configured with a single thread in a listener processing
> Process and CPC requests. The client is configured to timeout before the
> service sends a child CAS. The client is configured with no CPC timeout.
> UIMA AS client sends a CAS to an aggregate CasMultiplier which takes a long
> time to process (or there is a long GC). Before any child CASes are sent to a
> client, the client times out and sends a CPC. A bit later, the aggregate CM
> sends a child CAS. The client receives the CAS and finds that its parent CAS
> has expired. The client logs a message and ignores the CAS. The client is NOT
> sending the free Cas request to the aggregate CM, causing the aggregate to
> hang waiting for all of its CASes to be processed. Since the Free CAS never
> comes, the aggregate internal state is never updated and the thread
> processing the CPC is stuck (hangs). Modify UIMA AS client code to *always*
> send free cas request to a CM service.
>
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