Azureus and java applets problem on Ubuntu

am i the only one experiencing problems with java applications on Ubuntu Linux so far?

firtly, azureus consistently crashes on my machine. After that the program will not start properly until i delete the ~/.azureus directory. The problem happens often enough to render the program almost useless. The error message given in the console is this:

#
# An unexpected error has been detected by Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00000000, pid=7724, tid=3084708752
#
# Java VM: Java HotSpot(TM) Server VM (1.6.0_03-b05 mixed mode)
# Problematic frame:
# C 0x00000000
#
# An error report file with more information is saved as hs_err_pid7724.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#

[1]+ Aborted (core dumped) azureus

i am also having other problems with Sun Java 6 on Ubuntu. after playing games on site that uses a Java Applet in firefox I cannot view any applets until i delete the ~/.java directory. the error i get before doing that in the java console is this:

10/30/2007 02:58:40 * (36970) cpcaAC: getParameter: [ name = port def = 4007 ]
10/30/2007 02:58:40 * (36970) cpcaAC: getParameter: [ name = range def = 1 ]
10/30/2007 02:58:47 * (49283) cpcaAC: getParameter: [ name = port def = 4007 ]
10/30/2007 02:58:47 * (49283) cpcaAC: getParameter: [ name = range def = 1 ]
Event log opened: Tue Oct 30 02:58:47 GMT 2007
10/30/2007 02:58:47 ? (49283) pcaAC: Context Creation [ netbase = http://www.playsite.com/, base = ]http://www.playsite.com/global/psfiles/applets/java/]
10/30/2007 02:58:47 ? (49283) pcaAC: Context Creation [ netbase = http://www.playsite.com/, base = ]http://www.playsite.com/global/psfiles/applets/java/]
10/30/2007 02:58:52 * (49283) pgsSU: Error reading simple dump: java.security.AccessControlException: access denied (java.io.FilePermission /home/me/.java/deployment/cache/6.0/20/568b7994-3a2ff17e.idx read)
10/30/2007 02:58:52 * (49283) pgsSU: Error reading simple dump: java.security.AccessControlException: access denied (java.io.FilePermission /home/me/.java/deployment/cache/6.0/20/568b7994-3a2ff17e.idx read)
10/30/2007 02:58:52 * (49283) pgsSU: Error reading simple dump: java.security.AccessControlException: access denied (java.io.FilePermission /home/me/.java/deployment/cache/6.0/55/5818b9b7-6f2774e5.idx read)
10/30/2007 02:58:52 * (49283) pgsSU: Error reading simple dump: java.security.AccessControlException: access denied (java.io.FilePermission /home/me/.java/deployment/cache/6.0/55/5818b9b7-6f2774e5.idx read)
10/30/2007 02:58:52 * (49283) pgsSU: Error reading simple dump: java.security.AccessControlException: access denied (java.io.FilePermission /home/me/.java/deployment/cache/6.0/31/1e0e345f-50281218.idx read)
10/30/2007 02:58:52 * (49283) pgsSU: Error reading simple dump: java.security.AccessControlException: access denied (java.io.FilePermission /home/me/.java/deployment/cache/6.0/31/1e0e345f-50281218.idx read)
10/30/2007 02:58:53 * (49283) pgsSU: Error reading simple dump: java.security.AccessControlException: access denied (java.io.FilePermission /home/me/.java/deployment/cache/6.0/37/53800ae5-36027775.idx read)
10/30/2007 02:58:53 * (49283) pgsSU: Error reading simple dump: java.security.AccessControlException: access denied (java.io.FilePermission /home/me/.java/deployment/cache/6.0/37/53800ae5-36027775.idx read)
java.security.AccessControlException: access denied (java.io.FilePermission /home/me/.java/deployment/cache/6.0/47/1d1b8c6f-3d118e85.idx read)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.SecurityManager.checkRead(SecurityManager.java:871)
at java.io.RandomAccessFile.<init>(RandomAccessFile.java:203)
at com.sun.deploy.cache.CacheEntry.updateExpirationInIndexFile(CacheEntry.java:441)
at com.sun.deploy.net.DownloadEngine.isUpdateAvailable(DownloadEngine.java:728)
at com.sun.deploy.cache.DeployCacheHandler.get(DeployCacheHandler.java:132)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:681)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:654)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:977)
at java.net.URL.openStream(URL.java:1009)
at gadget.PresentationGadget.a([DashoPro-V1.32-013000])
at gadget.PresentationGadget.b([DashoPro-V1.32-013000])
at gadget.PresentationGadget.a([DashoPro-V1.32-013000])
at gadget.PresentationGadget.<init>([DashoPro-V1.32-013000])
at ch.<init>([DashoPro-V1.32-013000])
at cg.<init>([DashoPro-V1.32-013000])
at cg.a([DashoPro-V1.32-013000])
at com.playsite.clients.applet.AppletClient.createControlInterface([DashoPro-V1.32-013000])
at com.playsite.clients.applet.AppletClient.init([DashoPro-V1.32-013000])
at com.playsite.clients.applet.AppletClient.init([DashoPro-V1.32-013000])
at sun.applet.AppletPanel.run(AppletPanel.java:419)
at java.lang.Thread.run(Thread.java:619)

anyone else experience this? anything to be done about it?
[ October 29, 2007: Message edited by: Ra Carter ]

Azureus in Ubuntu only works best with java-gcj. You can have both java-gcj and sun-java and use sun-java as a default.

If the sun-java is your default Java, azureus will use that instead of java-gcj. In order to use java-gcj, you can tell which java you're using by specifying the JAVA_HOME. But if you already have JAVA_HOME set in your .bashrc and its value is the sun-java, then you can do the following:
1. Edit the /usr/bin/azureus.
2. Add the JAVA_HOME=/usr/lib/jvm/java-gcj

Hope this helps.

I see you are using the server version of the JVM. Is there a special reason you are not using the client version?

Are you running a 64-bit version of Ubuntu? And if you are, are you then also running a 64-bit version of Firefox? Unfortunately, Sun does not yet have a 64-bit browser plug-in (AFAIK), so in a 64-bit browser you can't run Java applets using Sun's JVM. Also, I think Sun's 64-bit version of the JVM comes only in the "server" variant, so that's why you might be using the server version.

It could be a bug in the JVM, I've had strange problems in the past that went away when I used the client instead of the server JVM (although that was on MS Windows).

Originally posted by Freddy Wong:
Azureus in Ubuntu only works best with java-gcj.

I found exactly the opposite. Using java-gcj, Azureus consumed 40% of my CPU (AMD XP-1400). Using Sun Java 1.5, Azureus consumes negligible CPU and has months of uptime. This makes sense because java-gcj doesn't have the hotspot JVM to do code optimization. Heck, it doesn't even implement all of Java 1.4.