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From "Jerry Cwiklik (JIRA)" <uima-...@incubator.apache.org>
Subject [jira] Commented: (UIMA-1298) A shared remote CM hangs when one of its clients runs out of memory
Date Thu, 20 Aug 2009 19:52:14 GMT

    [ https://issues.apache.org/jira/browse/UIMA-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12745597#action_12745597
] 

Jerry Cwiklik commented on UIMA-1298:
-------------------------------------

Consider spinning a thread in the CM service that periodically checks outgoing connections
to detect failed clients. Perhaps sending a Ping message to a client can be used to detect
stale connections and dead clients.

> A shared remote CM hangs when one of its clients runs out of memory 
> --------------------------------------------------------------------
>
>                 Key: UIMA-1298
>                 URL: https://issues.apache.org/jira/browse/UIMA-1298
>             Project: UIMA
>          Issue Type: Bug
>          Components: Async Scaleout
>    Affects Versions: 2.3AS
>            Reporter: Burn Lewis
>            Priority: Minor
>             Fix For: 2.3S
>
>
> Twice I observed that when one client aggregate of a shared remote CM crashed with an
out-of-memory exception the service stopped responding to the other client's requests.  No
errors found in the service log.  The client was not using the service at the time of the
crash.  Requests stacked up on the input queue ... almost as if the service was blocked on
an empty pool, or ...?  Killing a client (cntl-C) did not cause the hang.  Weird!

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