Tim, Sorry I forgot to give the JBM version, it is "jboss-messaging-1.2.0.GA" version. Use case is simple: Our application creates the messages (Emails, Web services and some application tasks which can be executed asynchronously) using the JBM 1.2.0 version JMS API. Other side, I wrote a Consumer Manager wrapper which polls for every 10 seconds (for example) to look for the new messages in the JMS queue, wrapper class uses the JMS API to poll for a new message. Every time it polls the wrapper class creates a javax.jms.MessageConsumer object as I shown you in the code. This is where new threads are getting created and they are not getting recycled. For you to reproduce the problem, call the method (which I posted) continuously and monitor the JVM for total thread counts. You would see increase in thread count. Hope I gave you the enough information. Thanks, APK. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4049769#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...