Yes it does cache. Have a look at: http://wiki.jboss.org/wiki/Wiki.jsp?page=JaasSecurityManagerService View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3982999#3982999 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3982999