[jboss-jira] [JBoss JIRA] (AS7-6967) ClassLoader memory leak with JSF

Mon Apr 22 07:52:54 EDT 2013

Vlad Arkhipov created AS7-6967:
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             Summary: ClassLoader memory leak with JSF
                 Key: AS7-6967
                 URL: https://issues.jboss.org/browse/AS7-6967
             Project: Application Server 7
          Issue Type: Bug
    Affects Versions: EAP 6.1.0.Alpha (7.2.0.Final)
            Reporter: Vlad Arkhipov
            Priority: Critical

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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