We had a similar problem, but not specifically dealing with the cache. We chose the second option mentioned here http://www.jboss.org/community/wiki/useJBossWebClassLoaderinJBoss5 Also, you might want to make sure you don't have duplicate classes in different jars/wars/ears. I haven't tried to access the cache via the MBean service, but it shouldn't be too difficult using the standard jmx api's: http://java.sun.com/j2se/1.5.0/docs/api/javax/management/package-summary.... I think you can also get the jmx interfaces via the InitialiContext::lookup(...) route. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4248277#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...