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https://issues.apache.org/jira/browse/OPENJPA-2566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14294044#comment-14294044
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brian yoder commented on OPENJPA-2566:
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Also my EJB has @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED) -
so it's importaint for me to get fields up front or they are NULL.
// I am using the EM find method after setting the fetch group
Contact c = emNoTran.find(Contact.class, new Integer(contactId));
> Memory leak when using addFetchGroup?
> -------------------------------------
>
> Key: OPENJPA-2566
> URL: https://issues.apache.org/jira/browse/OPENJPA-2566
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.3.1
> Reporter: brian yoder
>
> I have noticed a memory leak when using the following code on Glassfish J2EE
> server 3.1, however suspect the issue is not related to Glassfish.
> OpenJPAEntityManager kem = OpenJPAPersistence.cast(emNoTran);
> kem.getFetchPlan().addFetchGroup("contactDetails");
> It seems the code causes a huge memory leak with JDBCBrokerFactory growing
> its MapBackedSet, ConcurrentHashMap.
> Any ideas why this would be? I am calling the above code over-and-over again
> for each EJB method invocation, which it was my understanding it is only good
> for the current EM transaction. Perhaps I have misunderstood.
> My Requirement is to set the fetch group only for the current transaction,
> such that lazy fields for a particular entity get loaded up front, but only
> within this call from the EJB.
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