[jboss-jira] [JBoss JIRA] (WFLY-967) ClassLoader memory leak with JSF

Fri Apr 26 12:54:53 EDT 2013

    [ https://issues.jboss.org/browse/WFLY-967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12770457#comment-12770457 ] 

Stan Silvert commented on WFLY-967:
-----------------------------------

I'm not seeing an actual leak.  The instances do go away eventually.  It looks like something is timing out after 30 minutes, which makes these instances eligible for GC.  That made me thing it had something to do with session timeout.  But I'm not sure at this point.  When I tried setting session timeout to a lower value, I found a bug in Undertow, UNDERTOW-42.

Can you try to replicate my results on your end?

> ClassLoader memory leak with JSF
> --------------------------------
>
>                 Key: WFLY-967
>                 URL: https://issues.jboss.org/browse/WFLY-967
>             Project: WildFly
>          Issue Type: Bug
>          Components: JSF
>            Reporter: Vlad Arkhipov
>            Assignee: Stan Silvert
>            Priority: Critical
>         Attachments: war-leak.tar.gz
>
>
> JSF application's classes are not unloaded properly when undeployed. The test case is in the attachment. Steps to reproduce:
> # mvn package
> # deploy war-leak.war
> # open http://localhost:8080/war-leak
> # undeploy war-leak.war
> # analyze a heap dump to find unloaded ModuleClassLoader of war-leak.war
> References to the WAR classes are hold by java.beans.Introspector caches. It seems to be a known bug (feature?). For example Tomcat automatically invokes java.beans.Introspector.flushCaches() when WAR undeploys. There is also IntrospectorCleanupListener in Spring for the same purpose.
> http://wiki.apache.org/commons/Logging/UndeployMemoryLeak
> http://static.springsource.org/spring/docs/2.5.x/api/org/springframework/web/util/IntrospectorCleanupListener.html

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