You have to set the PermSize. See this http://wiki.jboss.org/wiki/PermanentGeneration View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4168759#4168759 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4168759