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


CPU is spinning 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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