Eran Levy created OPENJPA-2725:
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             Summary: fix ConcurrentModificationException during unrefed 
dependents cleanup
                 Key: OPENJPA-2725
                 URL: https://issues.apache.org/jira/browse/OPENJPA-2725
             Project: OpenJPA
          Issue Type: Bug
          Components: kernel
    Affects Versions: 2.4.2, 2.2.3
            Reporter: Eran Levy
            Priority: Minor


Committed a fix - pull request #9: https://github.com/apache/openjpa/pull/9

In some situations there are state elements in _derefCache HashSet causing 
ConcurrentModificationException because set has been modified during iteration.
Copy all elements into another set and calling the same 
deleteDeref(StateManagerImpl sm) function.



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