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https://issues.apache.org/jira/browse/MYFACES-2942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12921373#action_12921373
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Martin Kočí commented on MYFACES-2942:
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after 10 deploy-undeploy of same app at tomcat 6 (after each redeploy I did one
request to a view)
1 instance of RuntimeConfig (keeps live instances of NavigationCase and
NavigationRule and many others)
362 instances of org.apache.myfaces.view.facelets.tag.MetadataTargetImpl - for
those Memory Analyzer (http://www.eclipse.org/mat/) shows that immediate
dominator is org.apache.catalina.loader.WebappClassLoader.
RuntimeConfig is not GCed but next deploy replaces instance -> only one
instance remain. MetadataTargetImpl is another story - number of instances
grows after every redeploy. Each 39 instances of MetadataTargetImpl are loaded
with different WebappClassLoader instance (17 live instances of
WebappClassLoader in time of snapshot).
It looks like a cumulative issue: something (probably RuntimeConfig) prevents
WebappClassLoader instance to be GCed. Next deploy create new WebappClassLoader
which loads classes again and consumes perm gen space.
> Memory Leak in MyFaces 2.0.1 probably as well in 2.0.2
> ------------------------------------------------------
>
> Key: MYFACES-2942
> URL: https://issues.apache.org/jira/browse/MYFACES-2942
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 2.0.1, 2.0.2
> Environment: JBOSS AS
> Reporter: Werner Punz
> Priority: Critical
>
> Stan Silvert from JBoss reports:
> I'm pretty sure 2.0.1 has a memory leak on undeploy. Mojarra had an undeploy
> leak and it took a long time to track it down. The same test I was using on
> Mojarra also failed on MyFaces but I haven't had time to track down the leak
> in MyFaces.
> Maybe this is fixed in 2.0.2? If not maybe someone can go ahead and take a
> look? The mem leak keeps MyFaces from passing TCK on JBoss AS. To test, all
> you need to do is create a small exploaded JSF app. Then have a script that
> touches web.xml every 10 seconds. That will cause the app to redeploy. You
> will get a PermGen error in about an hour.
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