[ http://issues.apache.org/jira/browse/HIVEMIND-161?page=comments#action_12359618 ]
James Carman commented on HIVEMIND-161: --------------------------------------- How about this... 1. Add a thread cleanup listener. 2. Fire thread cleanup. 3. Verify that the listener is called. 4. Fire thread cleanup again. 5. Verify that the thread cleanup listener is not notified. 6. Re-register the thread cleanup listener. 7. Fire thread cleanup again. 8. Verify that the listener is called. > ThreadLocal object is never removed in ThreadEventNotifierImpl and holds the > classloader > ---------------------------------------------------------------------------------------- > > Key: HIVEMIND-161 > URL: http://issues.apache.org/jira/browse/HIVEMIND-161 > Project: HiveMind > Type: Bug > Components: framework > Versions: 1.1 > Environment: Tomcat 5.5.12, J2SE 1.6 Mustang build 62, Win XP SP2 > Reporter: Kyrill Alyoshin > Priority: Critical > Attachments: hivemind-threadlocals.pdf > > The following prevents the web application classloader from being garbage > collected on hot redeploys of web applications. > Please note that the issue is present on J2SE 1.5 as well. I use 1.6 only > because it has far better support for JVMTI and as such the issue was easy to > discover with YourKit profiler. Here it is: > 1. org.apache.hivemind.service.impl.ThreadEventNotifierImpl puts > EventListenerList ("list" variable) on its private ThreadLocal "_storage" > variable in addThreadCleanupListener method. > 2. No where in that class does the actual list gets removed from ThreadLocal. > Thus, the WebappClassLoader cannot be garbage collected because one of the > object that it loaded (i.e. EventListenerList) is strongly referenced by live > threads in the container, which leads to huge memory leaks on hot-redeploys. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
