FULL PRODUCT VERSION :
java version "1.5.0_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_03-b07)
Java HotSpot(TM) Client VM (build 1.5.0_03-b07, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows 2000 [Version 5.00.2195]

EXTRA RELEVANT SYSTEM CONFIGURATION :
full updated

A DESCRIPTION OF THE PROBLEM :
Our comlex application stacked modal dialogs on top of each other. In some cases the system hangs with the latest jre.
Last system without the effect was 1.5.0_02

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
* Start the test case
* press "go on"
* press "go on"
* press "go on"
* press "OK"

Now the application hangs.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
"Dialog2" is on top an usable
ACTUAL -
"Frame1" is focused and no input is possible

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.event.*;
import javax.swing.*;

class ModalTest extends JFrame {
  
  public static void main(String[] args) {
    try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Throwable ex) { }
    new ModalTest().setVisible(true);
  }

  ModalTest() {
    super("Frame1");
    this.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    JButton btn1 = new JButton();
    btn1.setText("go on");
    btn1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        Dialog1 dlg = new Dialog1();
        dlg.initFields();
        dlg.setVisible(true);
      }
    });
    this.getContentPane().add(btn1);
    pack();
  }

  class Dialog1 extends JDialog {

    private JDialog dlg2;
    
    Dialog1() {
      super(ModalTest.this, "Dialog1", true);
      JButton btn1 = new JButton();
      btn1.setText("go on");
      btn1.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(ActionEvent e) {
          dlg2.setVisible(true);
        }
      });
      getContentPane().add(btn1);
      pack();
      this.setLocation(50, 20);
    }

    void initFields() {
      dlg2 = new Dialog2();
    }
  }

  class Dialog2 extends JDialog {

    Dialog2() {
      super(ModalTest.this, "Dialog2", true);
      JButton btn1 = new JButton();
      btn1.setText("go on");
      btn1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          btn1_actionPerformed();
        }
      });
      getContentPane().add(btn1);
      pack();
      this.setLocation(80, 40);
    }

    private void btn1_actionPerformed() {
      JOptionPane.showMessageDialog(ModalTest.this, "last message before system hangs", "JOptionPane", JOptionPane.WARNING_MESSAGE);
    }
  }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
use jre1.5.0_02 or create dlg2 later

Release Regression From : 5.0u2
The above release value was the last known release where this 
bug was known to work. Since then there has been a regression.
###@###.### 2005-05-26 09:14:30 GMT