When you're looking up the queue, you need to use HA-JNDI with a URL that points to all of the nodes in the cluster. E.g. For a three node cluster the JNDI URL could be: 192.168.0.1:1100,192.168.0.2:1100,192.168.0.3:1100 The client will then try each server in turn until it reaches one. There is autodiscovery too, but I've never used that - this works for us and if it ain't broke.. :-) See Section 4 in the Clustering Guide documentation (specifically "HA-JNDI client and autodiscovery"). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3963120#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...