Looks like this is the thread that makes sure that idle connections (ones that were used but are no longer in use) are removed. Since each connection is represented by a thread, this removes the idle threads. You can set the thread limits in the server/xxx/deployer/jboss-web.deployer/server.xml file (you never indicated which version of JBoss AS you are using, so I assumed 4.2.1) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4089415#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...