The clustering mechanim is Jboss Messaging handle failover by allowing the switch to another JMS server of a cluster only if the initial JMS server on which the connection is created crashes. However, if the initial JMS server is stopped with shutdown the failover to a second server does not occur. Consequently any client having a connection of that stopped will not see its connection moving to another of the same JMS cluster. I suggest to consider the shutdown as a a case to trigger the failover and not only the crash. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4053017#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...