1 Reply Latest reply on Jul 11, 2003 5:55 AM by Jan Radl

    Unable to passivate due to ctx lock

    chdw Newbie


      Because I want to control the max capacity of my Stateful Bean, I modify standardjboss.xml.

      I set "min-capacity" to 5 and "max-capacity" to 10 which "container-name" is "Standard Stateful SessionBean".

      In the client code, It create 100 threads. Each thread create a remote object from the home object, and then call "noop" method in remote ojbect.

      But the server is not always passivate the ejb successful, sometime it print a warnning message "Unable to passivate due to ctx lock ..." in the console.

      When this happen, server seems to be in a deadlock. All the clients can't get result from the server, they will block until the transaction timeout.

      EJB code:
      public void noop() {
      try {
      File f = File.createTempFile("Temp","txt");
      FileOutputStream fos = new FileOutputStream(f);
      for (int i = 0; i < 1000; i++) {
      fos.write("1234567890".getBytes());
      }
      fos.close();
      f.delete();
      }
      catch (Exception ex) {
      ex.printStackTrace();
      }
      }


      public static void main(String[] args) throws Exception{
      Context ctx = getInitialContext();
      Object ref = ctx.lookup("TestBean");
      TestHome home = (TestHome)PortableRemoteObject.narrow(ref,TestHome.class);
      Vector v = new Vector();
      for (int i = 0; i < 100; i++) {
      RunThread thread = new RunThread(home.create(),i);
      v.add(thread);
      thread.start();
      }
      for (int i = 0; i < 100; i++)
      ((Thread)v.get(i)).join();
      System.out.println("All Done!");
      }


      public static class RunThread extends Thread {
      private int id;
      private Test test;
      public RunThread(Test test,int id) {
      this.test = test;
      this.id = id;
      }
      public void run() {
      try {
      test.noop();
      System.out.println("Job " + id + " Done!!!!!!!!!!!!!");
      test.remove();
      }
      catch (Exception ex) {
      System.err.println("Err:" + id + ":" + ex.getMessage());
      //ex.printStackTrace();
      }
      }
      }