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From "licheng (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (JCR-3344) Multhireads hang issue occurs because of oracle database socket read blocks forever
Date Fri, 15 Jun 2012 08:05:47 GMT

     [ https://issues.apache.org/jira/browse/JCR-3344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

licheng updated JCR-3344:
-------------------------

    Attachment: dead lock_mr1.log
                deak lock_mr2.log

The thread dump is attached.
                
> Multhireads hang issue occurs because of oracle database socket read blocks forever
> -----------------------------------------------------------------------------------
>
>                 Key: JCR-3344
>                 URL: https://issues.apache.org/jira/browse/JCR-3344
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-core
>    Affects Versions: 2.2
>         Environment: Winxp+oracle+JBoss
>            Reporter: licheng
>             Fix For: 2.2
>
>         Attachments: dead lock_mr1.log, deak lock_mr2.log
>
>
> During our test, the network between JBoss and Oracle has some problem for a while. At
that time, one JR thread which holding Global ISM lock is doing socket read with Oracle. Unfortunately,
this blocking socket read doesn't return anymore. Meanwhile, some other threads are warting
for the global ISM lock. As a result, many threads are blocked.
> Although we only hit it once, but it is really a serious problem. To workarount it, we
have to restart our application server. To our custom, it is not acceptable. 

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