Java SE (Java Platform, Standard Edition)

Our company had problems when we upgraded our test machines to JRE 1.4.2_06. The navy required all Web applications developers to ensure that the applications would still work when they upgraded a number of client machines to 1.4.2_06. Our applications were written using MS ASP.3.0 . We needed to be sure that users that switched from MS virtual machine to JRE would stil be able to run the web application. We found that there were issues on some Windows 2k machines and some Windows XP machines but not others. We contacted Microsoft because we felt the problem was with ASP their answer was as follows:

"I looked into your code and rs.htm and saw the problem was because the
applet is not loaded due to the following reason:

There is an javaapplet inside RS.htm and the codebase points to
rsproxy.clss, but the Java Sun did not ask for rsproxy.class, it asked
for /RSProxy/class.class instead and this caused the "rsproxy.class is
missing" error.
When I used the MS JVM, it asked for the rsproxy.class and it gets it
successfully and that is why you did not see the problem with MS JVM.

I got the following exception from sun java VM.

Java(TM) Plug-in: Version 1.4.2_06

Using JRE version 1.4.2_06 Java HotSpot(TM) Client VM

User home directory = C:\Documents and Settings\seanshi


Proxy Configuration: No proxy

----------------------------------------------------
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 properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------
load: class RSProxy.class not found.
Java.lang.ClassNotFoundException: RSProxy.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.net.UnknownHostException: devweb.aot-dev.com
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.<init>(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.New(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.createConnection(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
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

java.lang.ClassNotFoundException: RSProxy.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.net.UnknownHostException: devweb.aot-dev.com
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.<init>(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.New(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.createConnection(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
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

Even though you saw some variations on different OS and different Sun
JVM versions, I definitely recommend you to contact Sun and ask them to
setup the machine and use netmon to find out how the java applet is
loaded and how it should work. If you want me to talk to them from IE
perspective, I will be happy to. "

This did not happen prior versions of JRE. Is there some difference in the classpath settings that changed the location of the reporxy class?

ER Joell