Publishing a stateless java web service

Hi All,
Two questions:
1 - Does Oracle still support publishing java web services (stateless and stateful) just by declaring it in the web.xml file? I see that there are instructions on how to do this in an old whitepaper but any recent programmer documentation does not have it.
2 - I tried declaring a java class as a web service in the web.xml and it seems to do something (ie., when I go to the URI, there is actually the wsdl, and the various methods that can be invoked). However, when invoking one of the methods (which should just return "Hello World" without any processing at all), I get the following exception. Any ideas?
javax.servlet.ServletException
     at oracle.j2ee.ws.RpcWebService.doGetRequest(RpcWebService.java:632)
     at oracle.j2ee.ws.BaseWebService.doGet(BaseWebService.java:1117)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:292)
     at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:606)
     at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:312)
     at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:779)
     at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.HttpRequestHandler.run(HttpRequestHandler.java:264)
     at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].server.http.HttpRequestHandler.run(HttpRequestHandler.java:107)
     at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for J2EE].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
     at java.lang.Thread.run(Thread.java:536)
Thanks,
Johnny

hello Jonathan
In Jdev903 doc it is given that (pl/sql web service)
Limitations
On Oracle9i Database release 2, when a stored procedure or function of the same name and the same package name is accessible in more than one schema, then the SQLJ translator invoked during publication of PL/SQL web services will fail. In order to resolve this problem, ensure that packages to be published are visible only in one schema, and that no other packages in other schemas share the same name.
The problem u explained come into the same category.Which database version u r using ? .
regards
Mangesh

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