Java – 64-bit SLES11 machines can’t run java graphical apps in Citrix

We have a number of lab machines with different configurations. When one of our users tries to run a java application, such as jconsole, it will seem to start but there will be no display forwarding and no window will be shown. Under these conditions it will fail:

• 64-bit Suse SLES11 installation on server
• Client accesses servers through Citrix
• The application is a java application

Change any of these and it works. 64-bit SLES10 machines work, 32-bit SLES11 machines work, accessing a 64-bit SLES11 machine with cygwin/linux works, running other applications than java applications works.

Is there some change in SuSE from SLES10 to SLES11 which might affect the display forwarding in Citrix?

Sometimes, after a varying amount of time, it crashes with this stack trace:

Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment 
    at java.lang.Class.forName0(Native Method) 
    at java.lang.Class.forName(Class.java:169) 
    at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68) 
    at sun.awt.X11.XToolkit.<clinit>(XToolkit.java:89) 
    at java.lang.Class.forName0(Native Method) 
    at java.lang.Class.forName(Class.java:169) 
    at java.awt.Toolkit$2.run(Toolkit.java:834) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:826) 
    at sun.swing.SwingUtilities2$AATextInfo.getAATextInfo(SwingUtilities2.java:128) 
    at javax.swing.plaf.metal.MetalLookAndFeel.initComponentDefaults(MetalLookAndFeel.java:1556) 
    at javax.swing.plaf.basic.BasicLookAndFeel.getDefaults(BasicLookAndFeel.java:130) 
    at javax.swing.plaf.metal.MetalLookAndFeel.getDefaults(MetalLookAndFeel.java:1591) 
    at javax.swing.UIManager.setLookAndFeel(UIManager.java:542) 
    at javax.swing.UIManager.setLookAndFeel(UIManager.java:582) 
    at javax.swing.UIManager.initializeDefaultLAF(UIManager.java:1344) 
    at javax.swing.UIManager.initialize(UIManager.java:1433) 
    at javax.swing.UIManager.maybeInitialize(UIManager.java:1421) 
    at javax.swing.UIManager.getLookAndFeel(UIManager.java:495) 
    at sun.tools.jconsole.JConsole.updateLafValues(JConsole.java:63) 
    at sun.tools.jconsole.JConsole.<clinit>(JConsole.java:58) 
Could not find the main class: sun.tools.jconsole.JConsole.  Program will exit. 

UPDATE: Still having the same problem, when changing to a different graphics lib it seems to change the problem:

export JAVA_HOME=/usr/java/default
export PJA=$HOME/lib/pja.jar
jconsole -J-Xbootclasspath:$JAVA_HOME/jre/lib/rt.jar:$PJA -J-Dawt.toolkit=com.eteks.awt.PJAToolkit -version

This produces the version, which it did not previously. The program still can't run though.