Yes, i'm using the Spring JmsTemplate to send a response in an MDB to a remote clustered queue. If I move the MDBs into the same clustered servers where the clustered queues reside, I don't get this problem - it only happens when the MDB is running remotely from the clustered queue. Strange. Doesn't the JmsTemplate close sessions? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4165957#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...