Thread is behaving differently on different machines??

Question

Hi
I am developing a Java Swing application, which launches an external exe.
Then I am using a Thread to monitor whether the launched exe is running or terminated abruptly by using its PID. If it terminates then the thread shows a msg box.
Everything works fine in my machine and in few other machines.
But the same thread stop abruptly on some other machines... and displays the msg box even though the exe is running correctly.
And I heard thread behaves differently on different CPUs'.
How to handle this situation??
Please help.
This is my code:
public class SolverPoller implements Runnable
        String solver = null;
        int PID;
         * Constructor to initialise the Thread
         * @param programName - Solver execuatable name
         * @param pid - Process ID of the running solver
        SolverPoller(String programName, int pid)
            solver = programName;
            PID = pid;
            //reset the blnClosedAbruptly
            blnClosedAbruptly = false;
        public void run()
            File deleteFile = null;
            try
                //if the stored PID and refreshed are same
                //Continue waiting
                while(checkPIDOfSolver(String.valueOf(PID), solver))
                    //sleep for a sec
                    Thread.sleep(1000);
                //When the solver process terminates
                //interrupt ProgressBarIncrementer Thread
                inc.interrupt();
                if(Delia.getProcessorType() == 'T')
                    deleteFile = new File("TIP3DSolver.res");
                else if(Delia.getProcessorType() == 'S')
                    deleteFile = new File("SPLITVISSolver.res");
                if(!deleteFile.exists())
                    //set it to true, indicating solver terminated abruptly
                    blnClosedAbruptly = true;
                    progressBar.setValue(0);
                    progressBar.setStringPainted(true);
                    progressBar.setString("0%");
                    progressBar.repaint();
                    JOptionPane.showMessageDialog(DentonIntegratedToolApp.getDentonInstance().getFrame().getContentPane(), "Solver terminated abruptly!", "Solver Error", JOptionPane.ERROR_MESSAGE);
            catch(InterruptedException ie)
            catch(Exception e)
            finally
                deleteFile = null;
    }Praveen

Answer 1

I'm not sure if this matters, but it appears that you are calling Swing methods off of the EDT beginning with "progressBar.setValue(0);". What happens if you wrap those calls in a Runnable and call them with SwingUtilities.invokeLater(...)?