I have tested all cases and the only way to recover from these errors is to restart both boxes. I will write a keep alive packet running from a timer and see does it fix the issue. I have added the following to jboss-log4j.xml. Howard, should this be sufficient to see further into the "User null is NOT authenticated" error? Or do I need to trace other packages as well? Maybe security too? | <!-- ENABLE TRACE LEVEL LOGGING FOR JMS --> | <category name="org.jboss.jms"> | <priority value="TRACE"/> | </category> | View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4237670#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...