don't understand this: The service interface does not implement javax.xml.rpc.Service

Hello,
I am trying to call a web service. I have the following code in my servlet:

/*
 * ServletWSClient.java
 *
 * Created on 9 mai 2006, 12:32
 */
 
package pack;
 
import java.io.*;
import java.net.*;
 
import javax.servlet.*;
import javax.servlet.http.*;
 
/**
 *
 * @author Administrator
 * @version
 */
public class ServletWSClient extends HttpServlet {
    
    /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String s = null;
        try { // This code block invokes the myOperation operation on web service
           s =   getEJBWebServiceOneSEIPort().myOperation("fsdqsqdsf");
        } catch(java.rmi.RemoteException ex) {
            ex.printStackTrace();
        } catch(Exception ex) {
            ex.printStackTrace();
        }
 
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Servlet ServletWSClient</title>");
        out.println("</head>");
        out.println("<body>");
        out.println(s);
        out.println("<h1>Servlet ServletWSClient at " + request.getContextPath () + "</h1>");
        out.println("</body>");
        out.println("</html>");
        
        out.close();
    }
    
    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }
    
    /** Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }
    
    /** Returns a short description of the servlet.
     */
    public String getServletInfo() {
        return "Short description";
    }
    // </editor-fold>
 
    private pack.EJBWebServiceOne getEJBWebServiceOne() {
        pack.EJBWebServiceOne eJBWebServiceOne = null;
        //System.out.println("-->"+eJBWebServiceOne.getClass().getInterfaces().toString());
        
        try {
            javax.naming.InitialContext ic = new javax.naming.InitialContext();
            eJBWebServiceOne = (pack.EJBWebServiceOne) ic.lookup("java:comp/env/service/EJBWebServiceOne");
        } catch(javax.naming.NamingException ex) {
            ex.printStackTrace();
        }
        return eJBWebServiceOne;
    }
 
    private pack.EJBWebServiceOneSEI getEJBWebServiceOneSEIPort() {
        pack.EJBWebServiceOneSEI eJBWebServiceOneSEIPort = null;
        try {
            eJBWebServiceOneSEIPort = getEJBWebServiceOne().getEJBWebServiceOneSEIPort();
        } catch(javax.xml.rpc.ServiceException ex) {
            ex.printStackTrace();
        }
        return eJBWebServiceOneSEIPort;
    }
 
     
   
}

Here is what I get:

15:39:09,890 INFO  [STDOUT] javax.naming.NamingException: Could not dereference object [Root exception is javax.xml.rpc.JAXRPCException: The service interf
ace does not implement javax.xml.rpc.Service: pack.EJBWebServiceOne]
15:39:09,890 INFO  [STDOUT]     at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1135)
15:39:09,890 INFO  [STDOUT]     at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:690)
15:39:09,890 INFO  [STDOUT]     at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:701)
15:39:09,890 INFO  [STDOUT]     at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
15:39:09,890 INFO  [STDOUT]     at javax.naming.InitialContext.lookup(InitialContext.java:351)
15:39:09,890 INFO  [STDOUT]     at pack.ServletWSClient.getEJBWebServiceOne(ServletWSClient.java:84)
15:39:09,890 INFO  [STDOUT]     at pack.ServletWSClient.getEJBWebServiceOneSEIPort(ServletWSClient.java:94)
15:39:09,890 INFO  [STDOUT]     at pack.ServletWSClient.processRequest(ServletWSClient.java:32)
15:39:09,890 INFO  [STDOUT]     at pack.ServletWSClient.doGet(ServletWSClient.java:59)
15:39:09,890 INFO  [STDOUT]     at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
15:39:09,890 INFO  [STDOUT]     at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
15:39:09,890 INFO  [STDOUT]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
15:39:09,890 INFO  [STDOUT]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
15:39:09,890 INFO  [STDOUT]     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
15:39:09,890 INFO  [STDOUT]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
15:39:09,890 INFO  [STDOUT]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
15:39:09,890 INFO  [STDOUT]     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
15:39:09,890 INFO  [STDOUT]     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
15:39:09,890 INFO  [STDOUT]     at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
15:39:09,890 INFO  [STDOUT]     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
15:39:09,890 INFO  [STDOUT]     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
15:39:09,890 INFO  [STDOUT]     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
15:39:09,890 INFO  [STDOUT]     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
15:39:09,890 INFO  [STDOUT]     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
15:39:09,906 INFO  [STDOUT]     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
15:39:09,906 INFO  [STDOUT]     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
15:39:09,906 INFO  [STDOUT]     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
15:39:09,906 INFO  [STDOUT]     at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
15:39:09,906 INFO  [STDOUT]     at java.lang.Thread.run(Thread.java:595)
15:39:09,906 INFO  [STDOUT] Caused by: javax.xml.rpc.JAXRPCException: The service interface does not implement javax.xml.rpc.Service: pack.EJBWebServiceOne
 
15:39:09,906 INFO  [STDOUT]     at org.jboss.webservice.client.ServiceObjectFactory.getObjectInstance(ServiceObjectFactory.java:256)
15:39:09,906 INFO  [STDOUT]     at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
15:39:09,906 INFO  [STDOUT]     at org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1110)
15:39:09,906 INFO  [STDOUT]     at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1127)
15:39:09,906 INFO  [STDOUT]     ... 29 more
15:39:09,906 INFO  [STDOUT] java.lang.NullPointerException
15:39:09,906 INFO  [STDOUT]     at pack.ServletWSClient.getEJBWebServiceOneSEIPort(ServletWSClient.java:94)
15:39:09,906 INFO  [STDOUT]     at pack.ServletWSClient.processRequest(ServletWSClient.java:32)
15:39:09,906 INFO  [STDOUT]     at pack.ServletWSClient.doGet(ServletWSClient.java:59)
15:39:09,906 INFO  [STDOUT]     at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
15:39:09,906 INFO  [STDOUT]     at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
15:39:09,906 INFO  [STDOUT]     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
15:39:09,906 INFO  [STDOUT]     at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
15:39:09,906 INFO  [STDOUT]     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
15:39:09,906 INFO  [STDOUT]     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
15:39:09,906 INFO  [STDOUT]     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
15:39:09,906 INFO  [STDOUT]     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
15:39:09,906 INFO  [STDOUT]     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
15:39:09,906 INFO  [STDOUT]     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
15:39:09,906 INFO  [STDOUT]     at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
15:39:09,906 INFO  [STDOUT]     at java.lang.Thread.run(Thread.java:595)

I am POSITIVE that the eJBWebServiceOne object implements javax.rpc.Service. because I checked it. Then what's wrong? I use Jboss 4.0.3

Thanks in advance,

Julien.

Can you post your webservicesclient.xml?

Hello Jesus,
Thanks a lot for your reply. No I haven't got a webservicesclient.xml file. The ws client is a web app... Do I still need a webservicesclient.xml?
Julien.

Hello,

I realized that additional jars (jaxrpc jars) were packaged in the war and this must have been the source of my problems: there must have been two javax.xml.rpc.Service classes in contention.

Now I would be very grateful if someone could tell me how to resolve class contention problems with jboss.

Thanks in advance,

Julien.