Ok I think I understand what you are doing now :) JBM does support clustered durable subscriptions. If you had multiple MDBs on different nodes of the cluster with the same client id and durable subscription name, then JBM will ensure that only one of them will get the message. This allows you to spread processing of messages from a particular durable subscription across the cluster. This is a nice feature of JBM you won't find in many other JMS providers. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117143#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...