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lookup problem in jboss-3.0.8

Nalini Reddy
Posts: 18
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Hi All,
I have deployed HelloWorld EJB on jboss successfully.But when i am trying to run it it gives me the following error.

javax.naming.CommunicationException:RootException is java.rmi.Marshall Exception

also returns Exception:null

Could any of u please help me out.I need to develop a project on jboss,so trying to learn doing a sample example (HelloWorld example)first.

My HelloWorldClient program is as follows:

import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Hashtable;
import javax.ejb.CreateException;
import javax.rmi.PortableRemoteObject;
import javax.naming.NamingException;
import javax.ejb.RemoveException;

public class HelloWorldClient
public static void main( String [] args )
Hashtable h = new Hashtable();
h.put(Context.PROVIDER_URL, "localhost:1099");
"org.jboss.naming rg.jnp.interfaces");
Context ctx = new InitialContext(h);
Object obj = ctx.lookup( "HelloWorld" );

HelloWorldHome home =
obj, HelloWorldHome.class );
HelloWorld helloWorld = home.create();
System.out.println( helloWorld.hello());
catch ( Exception e )
System.out.println( "Exception: " + e.getMessage() );

I would b very grateful if anyone could help me out soon,please........

Thanks,in advance
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