Interference/timing(?) issue on macOS when creating and destroying GLCanvas

[jzy3d]

Initially discussed here.

One of our mac users has recently been helping troubleshoot issues that we've had with our macOS package. They identified two situations where creating and/or destroying a GLJPanel in close proximity to other AWT/Swing-ish commands will cause the application to hang with, so far, no known error messages.

The test system in question is running Big Sur with OpenJDK-17.0.1 These are distilled-down versions. If the code looks odd, it's because we have clipped out all the application-specific context for why these operations are done in this order.

We speculate that there may be a timing component because wrapping some of the operations in nested SwingUtilities.invokeLater() will allow the application to proceed without hanging.

import com.jogamp.opengl.awt.GLJPanel;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class MaximizeTest2 {

JFrame f;  
GLJPanel canvas;
JPanel p;

  public MaximizeTest2() {
    newWindow();
  }

  public void newWindow() {
    SwingUtilities.invokeLater(new Runnable() {
      @Override
      public void run() {
        f = new JFrame("test frame maximized both ");

        f.setExtendedState(JFrame.MAXIMIZED_BOTH); //This call is about the only thing that reliably
        f.setVisible(true);                                                    //triggers this behavior, but it actually came
                                                                                        //up in the real application
        p = new JPanel();
        canvas = new GLJPanel();
        //p.add(canvas); //Note: It does not seem to matter if canvas is added to the panel or not.
        f.setContentPane(p);
        f.validate();

        System.out.println("yyyy");
      }
    });
  }

  public static void main(String[] args) {
    // TODO code application logic here
    System.out.println("xxxx");
      new MaximizeTest2();
    System.out.println("zzzz");
  }
}

Reproduced with the following JDK on MacOS

• Azul JDK 17 for ARM
• OpenJDK 17 (Rosetta might be involved to run on ARM)
• OpenJDK 11 (Rosetta as well)