1: no assign(Assignable assignable, ExecutionContext executionContext) { | // do some stuff to dynamically figure out what group to assign to | assignable.setPooledActors(new String[] { "my-dynamic-group"}); | } | Assign to the group NAME, not use an expression 2: Why is this such a problem? ANY decent I&AM solution has a way to decide which groups a user belong to.... as mentioned multiple times in this topic and other ones... for the engine any string you put in the pooled actors is just a string.... without meaning. You give the meaning to it yourself. That is the nice thing wich makes it flexible View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4223087#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...