Messaging has no requirement to get acknowledgements that messages have been delivered to the client side. (The HTTP transport might use acknowledgments internally to manage it's buffer -although I am not sure that is the best way to do it- but that's an implementation detail of the HTTP transport). We want to be able to send messages asynchronously from the server to the client (i.e. don't wait for a response). This is part of what I have been going on about for a while (bi directional asynchronous transport). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3974781#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...