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From Jörn Kottmann (JIRA) <uima-...@incubator.apache.org>
Subject [jira] Commented: (UIMA-1728) UIMA AS Service logs falsely Stopping Collocated Delegate Cas Multiplier message
Date Mon, 01 Feb 2010 12:39:50 GMT

    [ https://issues.apache.org/jira/browse/UIMA-1728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12828078#action_12828078

Jörn Kottmann commented on UIMA-1728:


"What is happening in your scenario
is the following:

1) CM receives input CAS C1
2) The CM generates a new CAS C2
3) C2 is sent to Delegate Service D1
4) D1 throws exception on C2
5) Aggregate receives exception from D1 and sends STOP message to CM asking
it to stop producing
    new CASes from C1. This message is not sent to stop the CM!
6) CM returns C1 to the Aggregate
7) Aggregate determines that C1 has been marked as failed ( because of C2
8) Aggregate returns C1 marked as failed to the client

The confusion is the message that the aggregate logs: Stopping Collocated
Delegate Cas Multiplier:
It should say something like, Sending Request to CM to Stop Generating New
CASes from CAS id: xxx

> UIMA AS Service logs falsely Stopping Collocated Delegate Cas Multiplier message
> --------------------------------------------------------------------------------
>                 Key: UIMA-1728
>                 URL: https://issues.apache.org/jira/browse/UIMA-1728
>             Project: UIMA
>          Issue Type: Bug
>          Components: Async Scaleout
>    Affects Versions: 2.3AS
>            Reporter: Jörn Kottmann
>            Priority: Minor
>         Attachments: test.zip
> The service has one CM which creates for every CAS one new CAS and a dummy AE which throws
an exception on every second CAS.
> It looks like that for each exception thrown from the AE.process method the stopping
collocated delegate CM message is printed
> and logged:
> >>> Instance Hashcode:28681226 Controller:TestAAE Stopping Collocated Delegate
Cas Multiplier:TestCM
> and
> 1/25/10 1:14:51 PM - 13: org.apache.uima.aae.controller.AggregateAnalysisEngineController_impl.stopCasMultiplier:
INFO: Controller: TestAAE Stopping Collocated Delegate Cas Multiplier: TestAAE
> The problem might relate to the hang issue reported here:
> http://markmail.org/message/5dr5r3yyha4kbtlb

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