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From "Ravi P Palacherla (JIRA)" <>
Subject [jira] [Created] (OPENJPA-1970) CPU spinning at TreeMap.get in
Date Thu, 31 Mar 2011 16:00:05 GMT
CPU spinning at TreeMap.get in 

                 Key: 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

CPU is spinning at TreeMap.get in
The reason found to be because of structural modification of treemap outside a synchronized
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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