ClassDefNotFound Exception when calling PL/SQL Web Service

Question

Hi to all J2EE'ers.
I'm trying to construct a sample PLSQL Web Service. I'm using a 10g R1 Database Server, Apache HTTP Server from the 10g Companion CD, and OC4J 9.0.4 (I think it's called "standalone" OC4J), all on Linux (Suse 9.1).
I set up a simple package on the DB server, containing a simple method named "get_payload(p_arg in varchar2) return varchar2".
Assembling and deploying worked well (i.e., java -jar WebServiceAssembler.jar -config config-payload.xml, followed by java -jar admin.jar ormi://localhost admin admin -deploy ... and -bindWebApp ...), and after deployment I am able to navigate to the service endpoint, but when trying to test the method named "getPayload(String param0)", after entering the parameter value and clicking "Invoke" I receive an error from the Web Server:
500 Internal Server Error
java.lang.NoClassDefFoundError: oracle/aurora/ncomp/java/ClassNotFound
     at oracle.j2ee.ws.StatelessStoredProcRpcWebService.getGenerator(StatelessStoredProcRpcWebService.java:17)
     at oracle.j2ee.ws.RpcWebService.generateWrapperClass(RpcWebService.java:443)
     at oracle.j2ee.ws.RpcWebService.generate(RpcWebService.java:396)
     at oracle.j2ee.ws.RpcWebService.getWrapper(RpcWebService.java:514)
     at oracle.j2ee.ws.RpcWebService.doGetRequest(RpcWebService.java:613)
     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[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:733)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:317)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:790)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:270)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.0.0)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
     at java.lang.Thread.run(Thread.java:534)
Here's the file config-payload.xml I used for assembling the service (access data has been obfuscated):
<web-service>
<display-name>Payload Sample Web Service</display-name>
<description>Stateless Java Document Stye Web Service Example</description>
<destination-path>./PayloadSampleService.ear</destination-path>
<temporary-directory>/tmp</temporary-directory>
<context>/payloadws</context>
<stateless-stored-procedure-java-service>
<jar-generation>
<schema>Username/Password</schema>
<db-url>jdbc:oracle:thin:@Server:1521:ServiceName</db-url>
<db-pkg-name>sample_websrv_pkg</db-pkg-name>
</jar-generation>
<uri>/payload</uri>
<database-JNDI-name>jdbc/OracleDS</database-JNDI-name>
</stateless-stored-procedure-java-service>
<wsdl-gen>
     <wsdl-dir>wsdl</wsdl-dir>
     <option name="force">true</option>
     <option name="httpServerURL">http://localhost:8888</option>
</wsdl-gen>
<proxy-gen>
     <proxy-dir>proxy</proxy-dir>
     <option name="include-source">true</option>
</proxy-gen>
</web-service>
I scanned the web up and down to find references to similar problems, but to no avail. Any ideas how I could nail down the issue? WHAT class def can not be found? What code is around line 17 of StatelessStoredProcRpcWebService.java?
TIA for any input.
Werner

Answer 1

www.proxy.us.oracle.com -> www-proxy.us.oracle.com - looks like set in the obsetenv.bat file