I have a MDB that calls a SLSB in onMessage() and I noticed that a lot of instances of the SLSB were being created. I wrote a quick test with the simplest case of 1 producer, 1 consumer, and 1 SLSB and threw a bunch of messages at it. A MDB will cause 100 instances of the SLSB to be pooled when using the default pool implementation. (ThreadLocalPool?) If the SLSB in configured to use StrictMaxPool, then only 1 instance of the SLSB is created. Are these results expected or have I broken my jboss configuration? Using version 4.2.2GA View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4108755#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...