MDB itself is part of EJB3, not JMS. ActivactionConfigProperty belongs to the JCA adapter. So it's better to ask on the JCA forum. anonymous wrote : Also, is there any way to throttle the MDB consumers automatically based on CPU or IO activity and available resources? I will take that questions as a regular consumer. It shouldn't make any difference. You model your consumers based on your useCase (or business if you prefer calling it this way). A Messaging System should load balance messages accordingly to your resources anyway. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4238062#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...