Hello, I used to have my process deployed with async="false" nodes. Limiting the number of concurrent processes was as easy as limiting the CommandListenerBean MDB pool size. Because of very long transactions the synchronous execution required, I had to make some of the action nodes asynchronous. I wonder if anybody has some advice concerning the limitation of the concurrent number of async="true" processes. Thank you, Adrian. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4075156#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...