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https://issues.apache.org/jira/browse/OPENJPA-2538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14186761#comment-14186761
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Rick Curtis commented on OPENJPA-2538:
--------------------------------------
Sorry, I missed the part in your first update where you mention trying out that
property.
Have you taken another heap dump to see what is holding onto hard references to
the leaking classes/ClassLoader?
> Classloader memory leak in PCRegistry
> -------------------------------------
>
> Key: OPENJPA-2538
> URL: https://issues.apache.org/jira/browse/OPENJPA-2538
> Project: OpenJPA
> Issue Type: Bug
> Components: Enhance, osgi
> Affects Versions: 2.3.0
> Reporter: Grzegorz Grzybek
> Priority: Critical
>
> I'm using OpenJPA in OSGi environment (namely: JBoss Fuse 6.1). We had nasty
> {{NullPointerException}} in Felix when trying to load source code during
> initialization of class metadata. [This
> line|https://github.com/apache/openjpa/blob/2.3.0/openjpa-kernel/src/main/java/org/apache/openjpa/meta/MetaDataRepository.java#L1614]
> returned duplicate entity classes - half of them were from old revision of a
> bundle and half - from new revision.
> I tracked down the problem to the point, where
> {{org.apache.openjpa.enhance.PCRegistry#register()}} was invoked as part of
> constructing new instances of entity classes (static initialization injected
> during class enhancement). Although {{_metas}} is instance of
> {{ConcurrentReferenceHashMap}} with weak keys, the keys (entity classes) had
> other hard references too. Here's a list of the hard refs I got from simple
> heap dump:
> * org.apache.openjpa.meta.MetaDataRepository#_impls
> * org.apache.openjpa.meta.InheritanceComparator#_base
> * org.apache.openjpa.enhance.PCRegistry.Meta#pcSuper
> * org.apache.openjpa.meta.MetaDataRepository#_oids
> so on every bundle refresh we have next bunch of classes in {{_metas}}...
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