Got stuck - please help

[Sathvathsan Sampath]

Hi there !
I have installed a demo version of Weblogic server on my NT using the install shield. I have written a simple helloworld servlet and I am trying to invoke it from my browser, but I keep getting Error 500.
But, I am able to invoke other servelts that comes with weblogic server( for eg: http://localhost:7001/phone).
What I have done so far:
1) Compiled the Sathu.java prog successfully & placed the generated Sathu.class file in the default examples\servlets\Sathu.class
2) I made the following entries in the d:\weblogic.properties file.
weblogic.httpd.register.sathu=examples.servlets.Sathu
(this is similar to an exisitng entry :
weblogic.httpd.register.simpleFormServlet=examples.servlets.SimpleFormServlet)
3)When I open the weblogic console, i find this sathu servlet under other registered servlets.
Now, my problem is:
I open my browser and type http://localhost:7001/sathu
it gives me a "Error 500--Internal Server Error"
Can some body please tell me where I am going wrong.
Besides,
4) From the console, I clicked on the sathu servlet & clicked on the "Load Servlet" button, it gave me a error saying "Property change error for property "Load".
Unable to load servlet". WHy is this happening? In fact, I am getting this error for all the servlets.
I was able to register this servlet & invoke it successfully on java web server, but I am not able to do so on Weblogic server - Please help.
Thanks a million,
sathvathsan

[Asuthosh Borikar]

Add the following to your Weblogic properties file.
weblogic.debug.httpd.servlet=true

You will be able to see a stackTrace of the exception/error that's occurring.
Hope that helps!
-Asuthosh.

[Sathvathsan Sampath]

Asuthosh,
I tried what u said, but unfortunately, I am still stuck with it!
When I first invoke http://localhost:7001/sathu/
I get the following stack trace:

javax.servlet.ServletException: Servlet class: examples.servlets.Sathu couldn't be instantiated
at weblogic.servlet.internal.ServletStubImpl.createServlet(ServletStubImpl.java:376)
at weblogic.servlet.internal.ServletStubImpl.createInstances(ServletStubImpl.java, Compiled Code)
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:338)
at weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:164)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:99)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:742)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:686)
at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextManager.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java, Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)

In subsequent attempts, by clicking refresh, I get the following stack trace:

weblogic.utils.AssertionError: ***** ASSERTION FAILED *****[ getServlet() returned null!! ]
at weblogic.utils.Debug.assert(Debug.java, Compiled Code)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:104)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:742)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:686)
at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextManager.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java, Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java, Compiled Code)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled Code)

could you please me with this??
thanks in anticipation,
sathvathsan