I have a swing process that won't die after I close the main JFrame. The problem is that is does not happen every time. My app does kick off a SwingWorker (java 1.6) and only seems to hang if kick off that worker. BUt again not every time I kick off that worker. Has anyone seen this type of problem before? I need a good way to trouble shoot to see why the process will not finish? I am running on RedHat 5 (I think) so any useful tools would be a great help.