NoSuchMethodException calling a session bean method from a web service

Question

I am running on NetWeaver 6.40 SP10 on Windows.
I have a Java class (not a SessionBean) exposed as a web service where I invoke a session bean method with an argument that is another Java class (basically, just a JavaBean with some getters and setters).  I am getting a strange reflection-related error when I invoke a session bean method.  The exception I see is a 'java.lang.reflect.UndeclaredThrowableException', and if I unwrap it with 'ex.getCause()', I see 'java.lang.NoSuchMethodException: com.xx.ejb.PersistentObjectSBObjectImpl0.createR3Config(com.xx.common.R3Config)'
I have spent several days trying to come up with a testcase for this, but to no avail.  The calling class is:
--- snip R3UpdateTest.java ---
package com.xx.server.webse;
import com.xx.ejb.*;
import com.xx.common.*;
import java.util.*;
import javax.ejb.*;
import java.rmi.*;
import javax.naming.*;
* @author william_woodward
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
public class R3UpdateTest {
     public String createR3Config(String a, String b, String c,
               String d, String e, String f) {
          String retval = "success!";
          try {
               PersistentObjectSB poSB = getPersistentObjectSB();
               R3Config r3cfg = new R3Config();
               r3cfg.setR3HostName(a);
               r3cfg.setR3SystemNumber(b);
               r3cfg.setRfcUserName(c);
               r3cfg.setRfcPassword(d);
               r3cfg.setRfcClient(e);
               r3cfg.setRfcLanguage(f);
               poSB.createR3Config(r3cfg);
          } catch (Exception ex) {
               retval = "Exception: " + ex + ", Causing Exception : " + ex.getCause();
          return retval;
      * Private methods
     private PersistentObjectSB getPersistentObjectSB() throws RemoteException, CreateException, NamingException {
          Properties props = new Properties();
          props.put(Context.INITIAL_CONTEXT_FACTORY, "com.sap.engine.services.jndi.InitialContextFactoryImpl");
          props.put(Context.PROVIDER_URL, "localhost:50004");
          InitialContext ctx;
          ctx = new InitialContext(props);
          PersistentObjectSBHome poSBHome =
               (PersistentObjectSBHome) javax.rmi.PortableRemoteObject.narrow(
                    ctx.lookup("xx.com/CMPOBEAR/PersistentObjectSBBean"),
                    PersistentObjectSBHome.class);
          return poSBHome.create();
--- end R3UpdateTest.java ---
If I change the createR3Config() method to take an argument of class 'Object' instead of an argument of class 'R3Config', and then cast the object back into an R3Config in the method body, it all works fine.
Any clues, anyone?
Thanks,
- Bill
Message was edited by: Bill Woodward - Fixed some funky formatting

Answer 1

Sure, I can show them to you.  They are very similar to a couple of non-DC classes/projects I put together to try and duplicate the problem.
First, the interface, PersistentObjectSB.java:
package com.xx.ejb;
import javax.ejb.EJBObject;
import com.xx.common.R3Config;
import java.rmi.RemoteException;
public interface PersistentObjectSB extends EJBObject {
      * Business Method.
     public void updateR3Config(R3Config r3Config) throws RemoteException;
      * Business Method.
     public void createR3Config(R3Config r3Config) throws RemoteException;
And the implementation, PersistentObjectSBBean.java:
package com.xx.ejb;
import java.util.*;
import javax.ejb.*;
import javax.naming.*;
import com.xx.common.*;
import com.xx.interfaces.*;
* @ejbHome <{com.xx.ejb.PersistentObjectSBHome}>
* @ejbLocal <{com.xx.ejb.PersistentObjectSBLocal}>
* @ejbLocalHome <{com.xx.ejb.PersistentObjectSBLocalHome}>
* @ejbRemote <{com.xx.ejb.PersistentObjectSB}>
* @stateless
public class PersistentObjectSBBean implements SessionBean {
     private R3ConfigEJBLocalHome _r3ConfigEJBLocalHomeIf = null;
     public void ejbRemove() {
     public void ejbActivate() {
          try {
               setEJBLocalHome();
          } catch (NamingException e) {
               throw new EJBException(e);
     public void ejbPassivate() {
     public void setSessionContext(SessionContext context) {
          myContext = context;
     private SessionContext myContext;
      * Create Method.
     public void ejbCreate() throws CreateException {
          try {
               setEJBLocalHome();
          } catch (NamingException e) {
               throw new CreateException();
      * Business Method.
     public void updateR3Config(R3Config r3Config) {
          try {
               R3ConfigPrimaryKey primKey = new R3ConfigPrimaryKey();
               primKey.r3HostName = r3Config.getR3HostName();
               primKey.r3SystemNumber = r3Config.getR3SystemNumber();
               R3ConfigEJBLocal r3ConfigEJBLocal =
                    _r3ConfigEJBLocalHomeIf.findByPrimaryKey(primKey);
               if (r3ConfigEJBLocal != null) {
                    r3ConfigEJBLocal.updateR3Config(r3Config);
          } catch (Exception e) {
               // What to do here?
      * Business Method.
     public void createR3Config(R3Config r3Config) {
          try {
               R3ConfigEJBLocal r3ConfigEJBLocal =
                    _r3ConfigEJBLocalHomeIf.create(r3Config);
          } catch (Exception e) {
               // What to do here?
     private void setEJBLocalHome() throws NamingException {
          Properties props = new Properties();
          props.put(
               Context.INITIAL_CONTEXT_FACTORY,
               "com.sap.engine.services.jndi.InitialContextFactoryImpl");
          InitialContext ctx = new InitialContext(props);
          Object obj = ctx.lookup("localejbs/R3ConfigEJB");
          _r3ConfigEJBLocalHomeIf = (R3ConfigEJBLocalHome) (obj);
Thanks,
- Bill