Yes, that is my real requirement. I have a question about this grouping feature. If two clients connect with the same groupId, then what happens? In scenarios referenced in that Websphere blog post I linked, that's what would happen in some edge-case scenarios. Hopefully your grouping feature would cancel the previous subscriber using that groupid -- in order for this to be a solution to this problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4141299#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...