Getting Class cast exception while Lookup EJB2.1 session bean using JNDI name in WAS6.1

[ketaki gujarathi]

Problem Statement is :

Following Client Program is running fine:

import java.math.BigDecimal;
import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

import MyFirstEJbProject.ImportedClasses.com.infy.converter.Converter;
import MyFirstEJbProject.ImportedClasses.com.infy.converter.ConverterHome;

public class ConverterClient {
public static void main(String[] args) {
try {


Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,"com.ibm.websphere.naming.WsnInitialContextFactory");
//env.put(Context.PROVIDER_URL,"rmi://10.76.205.18:1099");
env.put(Context.PROVIDER_URL,"iiop://10.76.205.18:2811");



Context initial = new InitialContext(env);




//Context myEnv =(Context)initial.lookup("java:/comp/env/");
Object objref =initial.lookup("ejb/Converter");
System.out.println(objref.getClass().getName());

System.out.println(objref.getClass().getClassLoader());
ConverterHome home =(ConverterHome)PortableRemoteObject.narrow(objref,ConverterHome.class);
Converter currencyConverter =(Converter)home.create();
BigDecimal param = new BigDecimal ("100.00");
BigDecimal amount =currencyConverter.dollarToYen(param);
System.out.println("amount in yen"+amount);
amount = currencyConverter.yenToEuro(param);
System.out.println("amount in euro"+amount);

} catch (Exception ex) {
System.err.println("Caught an unexpected exception!");
ex.printStackTrace();
}
}
}

But if i am trying to do the same stuff for other session bean using JNDI name specified in WAS6.1 i am getting

Caught an unexpected exception!
java.lang.ClassCastException: Unable to load class: com.infy.display._DisplayHome_Stub
at com.ibm.rmi.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:372)
at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:156)
at DisplayClient.main(DisplayClient.java:41)
The Code for this is :

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

import Secondproject.ImportedClasses.com.infy.display.DisplayHome;
import Secondproject.ImportedClasses.com.infy.display.Display;





public class DisplayClient {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		try {


			Hashtable env = new Hashtable();
			env.put(Context.INITIAL_CONTEXT_FACTORY,"com.ibm.websphere.naming.WsnInitialContextFactory");
			//env.put(Context.PROVIDER_URL,"rmi://10.76.205.18:1099");
			env.put(Context.PROVIDER_URL,"iiop://localhost:2812");



			Context initial = new InitialContext(env);




			//Context myEnv =(Context)initial.lookup("java:/comp/env/");
			Object objref =initial.lookup("com/infy/display/ejb/Display");
			//ConverterHome home =(ConverterHome)PortableRemoteObject.narrow(objref,ConverterHome.class);
			System.out.println(objref.getClass().getName());
			DisplayHome  home=(DisplayHome )PortableRemoteObject.narrow(objref,DisplayHome.class);
			
			Display display=(Display)home.create();
			  
			System.out.println(display.show()); 
			
		}
			catch (Exception ex) {
				System.err.println("Caught an unexpected exception!");
				ex.printStackTrace();
				}
				}
				}

After debugging for entire one day i have come to know that In ConverterClient(running program) when class coming as a result of "LOOKUP IS : com.infy.converter._ConverterHome_Stub" WHILE IN SECOND CASE IT IS:" org.omg.stub.java.rmi._Remote_Stub" BUT IT should be something like this com.infy.display._DisplayHome_Stub" and also the Classloader is null.Kindly let me know How can i resolve this issue.

[Jeanne Boyarsky]

I've added [ code ] tags to your post to make it easier to read.

  Object objref =initial.lookup("com/infy/display/ejb/Display");   

Are you sure this is your JNDI name. Usually they begin with ejb/

[ketaki gujarathi]

Hi Jeanne,
I was able to resolve the classcast exception .
Following was the issue::
I was using eclipse and in the classpath of the WS i was referring to the jre of WAS on which my ear was deployed.
However after i moved back to the default jre provided by eclipse things started working as per the expectations.

Thanks a lot ...