Have some more info about my experiments version 202. If I add this in to my launch args there is no exception at startup..... | -Djavax.management.builder.initial=org.jboss.system.server.jmx.MBeanServerBuilderImpl | -Djboss.platform.mbeanserver | -Dcom.sun.management.jmxremote=true | -Dcom.sun.management.jmxremote.port=13095 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false However, upon connecting with jboss - all of the jconsole tabs are disabled. ie Overview, Memory, Threads, Classes, VMSummary are all disabled. Only the MBeans tab is enabled. If I launch JBoss with these args... | -Dcom.sun.management.jmxremote=true | -Dcom.sun.management.jmxremote.port=13095 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false ...ie I remove the jboss mbean entries, then I get the exception I posted above. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4135700#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...