I have one machine which was using the Sun JDK 1.5.0 java plugin (installed manually in /opt) fine under Fedora Core 2. After upgrading this machine to Fedora Core 4 and installing the jpackage rpms for JDK 1.5.0-05 using the nosrc rpms from jpackage, I am unable to load java applets in Firefox. If I go to the web page... http://www.java.com/en/download/help/testvm.xml I get a red X in the Test your JVM section of that web page and the Java console log shows... Java Plug-in 1.5.0_05 Using JRE version 1.5.0_05 Java HotSpot(TM) Client VM User home directory = /home/prrlab ---------------------------------------------------- c: clear console window f: finalize objects on finalization queue g: garbage collect h: display this help message l: dump classloader list m: print memory usage o: trigger logging p: reload proxy configuration q: hide console r: reload policy configuration s: dump system and deployment properties t: dump thread list v: dump thread stack x: clear classloader cache 0-5: set trace level to <n> ---------------------------------------------------- load: class testvm.class not found. java.lang.ClassNotFoundException: testvm.class at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:168) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:119) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:599) at sun.applet.AppletPanel.createApplet(AppletPanel.java:712) at sun.plugin.AppletViewer.createApplet(AppletViewer.java:1750) at sun.applet.AppletPanel.runLoader(AppletPanel.java:641) at sun.applet.AppletPanel.run(AppletPanel.java:320) at java.lang.Thread.run(Thread.java:595) Caused by: java.io.IOException: open HTTP connection failed. at sun.applet.AppletClassLoader.getBytes(AppletClassLoader.java:271) at sun.applet.AppletClassLoader.access$100(AppletClassLoader.java:44) at sun.applet.AppletClassLoader$1.run(AppletClassLoader.java:158) at java.security.AccessController.doPrivileged(Native Method) at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:155) ... 9 more Exception in thread "Thread-5" java.lang.NullPointerException at sun.plugin.util.GrayBoxPainter.showLoadingError(GrayBoxPainter.java:1 53) at sun.plugin.AppletViewer.showAppletException(AppletViewer.java:1921) at sun.applet.AppletPanel.runLoader(AppletPanel.java:646) at sun.applet.AppletPanel.run(AppletPanel.java:320) at java.lang.Thread.run(Thread.java:595) /usr/share/themes/Clearlooks/gtk-2.0/gtkrc:49: Engine "clearlooks" is unsupporte d, ignoring I have tried both the 'use browser setting' and 'direct connection' from the Networksettings in the Java Control Panel. Neither helps. Turning off the firewall completely and/or disabling ipv6 doesn't help either. I also don't have any better luck if I manually install the JDK binary from Sun in /opt and symlink its plugin to /usr/lib/mozilla/plugins. Surely there must have been other users with this problem, no? Thanks in advance for any advice as I am loath to reinstall Fedora Core 4 just because of this glitch. Jack ps I have clean installed Fedora Core 4 on another intel box and it is able to use the same identical java packages without complaint on the same network. It is insane that java is so hard to get working on Fedora *sigh*.
