[ https://issues.jboss.org/browse/AS7-6849?page=com.atlassian.jira.plugin.s... ] Vlad Arkhipov commented on AS7-6849: ------------------------------------ I attached a simple test case. Steps to reproduce: # Install JBoss 6.1.0-EAP # Start JBoss: standalone.sh --server-config=standalone-full.xml # Add a new JMS queue: jboss-cli.sh --file=setup.cli # Deploy EJB archive # Undeploy EJB archive Then in VisualVM look up for ModuleClassLoader with MDB class loaded: select heap.livepaths(heap.findClass("org.jboss.test.leak.MDB").loader) {quote}Can you post any info about what is holding onto these references?{quote} org.jboss.thread.JBossThread.contextClassLoader (default-threads-1) is holding a reference to MDB ModuleClassLoader. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira