I put this in standardjboss.xml's Standard Message Driven Bean <container-configuration> node... <container-pool-conf> 2 true </container-pool-conf> But that is not working...my MDB is happily accepting 4 simultaneous requests and 4 instances are getting created...(I printed thread ID and object ID in onMessage() method, which prints 4 different values) I even set this in standardjboss.xml's <invoker-proxy-binding> node... 1 2 30000 1 But doesn't work :( View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3971891#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...