This is is open for the failure on Solaris as suggested by Oleg Semenov <###@###.###>. 

Please see CR# 6337388 for complete background of this defect.

Here's Dmitri Trembovetski's simplified test shows the same bug:

****************************
import java.awt.Canvas;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.GraphicsConfiguration;
import java.awt.Window;


class AWTRenderingContents extends Canvas {

    public AWTRenderingContents(GraphicsConfiguration gc) {
        super(gc);
    }

    public void paint (Graphics g) {
    }
    
    public static void main (String args[]) {
        for (int i = 0; i < 20; i++) {
            Frame f = new Frame("AWTRenderingContents");
            f.setSize(400, 400);
            f.setLocation(10, 10);
            f.add(new AWTRenderingContents(f.getGraphicsConfiguration()));
            f.addWindowListener(new java.awt.event.WindowAdapter() {
                public void windowClosing(java.awt.event.WindowEvent we) {
                    Window w = (Window) we.getSource();
                    w.dispose();
                    System.gc();
                    System.runFinalization();
                    System.gc();
                    System.runFinalization();
                    System.gc();
                    System.runFinalization();
                    System.gc();
                    System.runFinalization();
                }
            });
            f.setVisible(true);
        }
    }
}
******************************

Dmitri and Oleg 's analyses can be found in CR# 6337388