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From "Ravi P Palacherla (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OPENJPA-1970) CPU spinning forever at TreeMap.get in Schema.java
Date Thu, 31 Mar 2011 16:07:05 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-1970?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ravi P Palacherla updated OPENJPA-1970:
---------------------------------------

    Attachment: OPENJPA-1970.diff

Changes in Schema.java contributed by Horoki Tateno.


> CPU spinning forever at TreeMap.get in Schema.java 
> ---------------------------------------------------
>
>                 Key: OPENJPA-1970
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1970
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jdbc
>    Affects Versions: 1.1.1
>         Environment: openJPA 1.1.x
>            Reporter: Ravi P Palacherla
>            Assignee: Ravi P Palacherla
>         Attachments: OPENJPA-1970.diff
>
>
> CPU is spinning forever at TreeMap.get in schema.java.
> The reason found to be because of structural modification of treemap outside a synchronized
block.
> Synchronizing the treemap is fixing the issue.
> The issue can be reproduced with an openJPA test case but due to the nature of the problem,
it is replicable intermittently on dual core machine.
> Attached patch has the test case and also the test case is ignored in default runs because
it will cause the tests to stuck at TreeMap.get.
> This is seen in 1.1.x version of openJPA and hence uploading the patch only for that
version.

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