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From "Jerry Cwiklik (JIRA)" <uima-...@incubator.apache.org>
Subject [jira] Updated: (UIMA-1199) If a parallel flow involves colocated delegates the application hangs
Date Fri, 10 Oct 2008 19:30:44 GMT

     [ https://issues.apache.org/jira/browse/UIMA-1199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jerry Cwiklik updated UIMA-1199:

    Attachment: uimaj-as-core-UIMA-1199-patch-02.txt

Modified UIMA AS Aggregate code to stop processing if a delegate in a parallel step is not
remote. The misconfiguration is detected when processing the first CAS. if the Flow Controller
returns ParallelStep and if any of the delegates is not remote the Aggregate calls stop()
and terminates.

> If a parallel flow involves colocated delegates the application hangs
> ---------------------------------------------------------------------
>                 Key: UIMA-1199
>                 URL: https://issues.apache.org/jira/browse/UIMA-1199
>             Project: UIMA
>          Issue Type: Bug
>          Components: Async Scaleout
>    Affects Versions: 2.2.2
>            Reporter: Burn Lewis
>            Priority: Minor
>         Attachments: UIMA-1199-test.patch, uimaj-as-core-UIMA-1199-patch-01.txt, uimaj-as-core-UIMA-1199-patch-02.txt
> Parallel flows can only run in parallel when the delegates are remote, but we should
handle any colocated ones by running them sequentially in arbitrary order as synchronous UIMA
does.  The spec says that the framework is not obliged to run them in parallel.  The alternative
of rejecting the flow is undesirable as it can only be detected at run time since the flow
controller may be user code.

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