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JAVA VM Problems

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martinv@thinkingspace.com.au - 08 Feb 2007 06:41 GMT
Hiyas,

Hope this is the right place to post this. If not, please let me know!

I am at my wits end with this one so any and all constructive
suggestions are appreciated.

Basically, all Java applets show up as a red X. I have tried
everything imaginable including completely uninstalling and
reinstalling the latest version of the JRE (1.5.0_10-b03 as of this
posting). I have confirmed my IE settings as per the FAQ's on the Java
website and have tried both IE6 and FireFox. Both have the same issue.
I am using the test applets on the Java.com website and have tried
several others on various other websites. All give me the same result.
We do not have a proxy server.

I tried Java on a different PC on our network which has never had Java
on it before and logged in as a different user. Same problem.
I tried Java on my personal laptop (not part of the domain). Same
problem.

This is where I began thinking about environmental causes such as our
Cisco firewall.
I tried initiating a software VPN tunnel to a remote site and routing
all traffic from the PC through the Internet connection at the remote
site, thus bypassing our firewall rules. Same problem.

I will try with my laptop from home tonight to completely eliminate
the Internet connection as a factor.
I simply don't understand this as everything was working fine a few
months ago.
In case it helps, we have had a server and network refresh since Java
was last working but the firewall was not touched at all. I have tried
this on both new and old PCs (some of the old PCs were not touched
during the refresh) and the result is always the same.

We do not run any firewall software inside our network at all and
Windows firewall is disabled across the board. We run Symantec
Antivirus Corporate Edition and my laptop has AVG w/ firewall
disabled. I have tried with AV both on and off. Neither works.

In case it helps, I will conclude this post with a copy-and-paste of
the Java console output from the URL: http://www.java.com/en/download/
help/testvm.xml

As I said, any ideas are welcome!

Java Plug-in 1.5.0_10
Using JRE version 1.5.0_10 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\manager

----------------------------------------------------
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(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.applet.AppletClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.applet.AppletClassLoader.loadCode(Unknown Source)
    at sun.applet.AppletPanel.createApplet(Unknown Source)
    at sun.plugin.AppletViewer.createApplet(Unknown Source)
    at sun.applet.AppletPanel.runLoader(Unknown Source)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
    at sun.applet.AppletClassLoader.getBytes(Unknown Source)
    at sun.applet.AppletClassLoader.access$100(Unknown Source)
    at sun.applet.AppletClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    ... 10 more
load: class testvm.class not found.
java.lang.ClassNotFoundException: testvm.class
    at sun.applet.AppletClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.applet.AppletClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.applet.AppletClassLoader.loadCode(Unknown Source)
    at sun.applet.AppletPanel.createApplet(Unknown Source)
    at sun.plugin.AppletViewer.createApplet(Unknown Source)
    at sun.applet.AppletPanel.runLoader(Unknown Source)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
    at sun.applet.AppletClassLoader.getBytes(Unknown Source)
    at sun.applet.AppletClassLoader.access$100(Unknown Source)
    at sun.applet.AppletClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    ... 10 more
load: class testvm.class not found.
java.lang.ClassNotFoundException: testvm.class
    at sun.applet.AppletClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.applet.AppletClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.applet.AppletClassLoader.loadCode(Unknown Source)
    at sun.applet.AppletPanel.createApplet(Unknown Source)
    at sun.plugin.AppletViewer.createApplet(Unknown Source)
    at sun.applet.AppletPanel.runLoader(Unknown Source)
    at sun.applet.AppletPanel.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
    at sun.applet.AppletClassLoader.getBytes(Unknown Source)
    at sun.applet.AppletClassLoader.access$100(Unknown Source)
    at sun.applet.AppletClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    ... 10 more
Bill W - 10 Feb 2007 13:33 GMT
Downloading and installing JVM from the following site finally fixed my
problem.  Scroll down to the bottom of the screen where you'll see "click
here to download."  Once installed, you will then see Microsoft VM listed in
your IE advanced internet options.  I have not had any problems with Java
since I installed Microsoft VM from this site.

http://www.softwarepatch.com/windows/javavm.html

> Hiyas,
>
[quoted text clipped - 119 lines]
> at java.security.AccessController.doPrivileged(Native Method)
> ... 10 more
martinv@thinkingspace.com.au - 11 Feb 2007 11:23 GMT
Thanks for that Bill, I'll give that a go next time I'm in at the
office. Interestingly, I have tested my laptop from home now (same ISP
as the office) and, lo-and-behold, JAVA works fine. To my mind, this
means that there must be something about our Cisco Firewall config
that is causing this problem but I can't even begin to fathom what in
a Cisco config could stop all JAVA applets from loading??

Admitedly I don't know much about the mechanics of JAVA but I did not
think that a firewall would see a JAVA applet any differently than it
would any other HTTP download. Or does JAVA use a different port? Not
that it should matter as there are no outbound port restrictiongs, but
worth knowing :)

Or is there some other common factor someone can think of that I have
missed other than the firewall?

Grrrr.. At least I have the cause narrowed down a little.

Thanks in advance for any thoughts or opinions!
 
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