Rémy Maucherat wrote: Who says I want to interfere? I just want to know if the client disconnects. If you're managing some session-related objects tied to an unreliable client (the browser), a callback like this is useful to trigger clean-up facilities. I know Jetty has a feature like this and a number of people have found it useful, especially for push applications. -- Bill Burke JBoss, a division of Red Hat http://bill.burkecentral.com