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https://issues.jboss.org/browse/AS7-3734?page=com.atlassian.jira.plugin.s...
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Scott Marlow commented on AS7-3734:
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Stepping through the cleanup code, while running unit test
org.jboss.as.test.integration.jpa.dsrestart.JpaDsRestartTestCase, looks good (both
collections get cleaned up correctly with the above mentioned change).
HibernateAnnotationScanner keeps references to application's
ClassLoader
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Key: AS7-3734
URL:
https://issues.jboss.org/browse/AS7-3734
Project: Application Server 7
Issue Type: Bug
Components: JPA / Hibernate
Affects Versions: 7.1.0.CR1b
Environment: Seam 2.2.2 application using JPA/Hibernate 3
Reporter: Philippe Guinot
Assignee: Scott Marlow
Labels: PersistenceUnitMetadata, class, classloader, leak
Well, this is a minor issue as the references are kept in WeakHashMaps. Indeed, the
HibernateAnnotationScanner contains static weak maps of the Package/Classes of the current
application. They are indexed by PersistenceUnitMetadata.
When the application gets undeployed the PersistenceUnitMetadata is no longer referenced,
and should be garbage collected. However the value of the WeahHashMap won't be removed
until the next expunging is done. As the application has been undeployed, it does not
really make sense to keep strong references to the classes or packages. So, using
Set<WeakReference<Package>> and Set<WeakReference<Class<?>>>
would improve garbage collecting of the application's class loader and make more
PermGen easily available.
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