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Date: Tue, 16 Dec 2008 15:12:44 -0800 (PST)
From: "Fernando (JIRA)" <jira@apache.org>
To: dev@openjpa.apache.org
Subject: [jira] Updated: (OPENJPA-825) slices: hangs with multithreaded true
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     [ https://issues.apache.org/jira/browse/OPENJPA-825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fernando updated OPENJPA-825:
-----------------------------

    Attachment: hang-multithread-2.jstack

another jstack of openjpa slices hanging: within the StateManager...

1) I have applied the patch from OPENJPA-826, that removes the first hang spot in QueryImpl.isUnique
    (this was the hang shown in the first stack trace I attached)

2) I have disabled the current work around to this bug applied by Pinaki
    (the work around currently turns off ParallelExecutor when Multithreaded=true)
    (I have disabled the work around to test a parallel execution, to find and fix hangs)


> slices: hangs with multithreaded true
> -------------------------------------
>
>                 Key: OPENJPA-825
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-825
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 2.0.0
>            Reporter: Fernando
>            Assignee: Pinaki Poddar
>            Priority: Critical
>         Attachments: hang-multithread-2.jstack, hang-multithread.jstack, hang-multithread.txt
>
>
> When I turned on openjpa.Multithreaded as a possible fix for another bug, I see that the system hangs.  Attached are going to be a log file, and jstack, showing how it system hung on the very first query. ( it did execute a few find() operations, but those are not executed via ParallelExecutor ).

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