I am not sure if the problem is still bothering you? I would argue that you shouldn't design for a synchronous answer, even if you could somehow tweak it technically. Basically the synchronous Invoker is not more than a CallBack-JMS-Queue (in the case you use JMs as a transport). By using a CallBack-Queue, you can also call the client back at the end of all processing. You just should think about the possibility, that no answer arrives in the timeout (which can also happen with the synchronous invoker)... What do you think? Or what was you solution to this? Cheers Bernd View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4182076#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...