I haven't tried JDK 1.3.1 for a while. I have started it developing under 1.3, but I'm not sure if it would still work. I have used at least 1.4+. As for the XML, I'm uxing JMX properties not supported by JBoss 3.2.7. Maybe you could use the DLL on 3.2.7 (if you can switch the JVM to 1.4+).. and use kill -3 or Ctrl-Break to start/stop capturing data. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3985011#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...