JBMESSAGING-1256 wasn't confirmed yet... I believe you just have two nodes with the same ID on the same network. You just need to configure your cluster properly. If you need set of clusters on the same network, you certainly need different multicast-addresses. If all the nodes are part of the same cluster, they all need unique IDs. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4175998#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...