EJB3 client error

[Vikas Roonwal]

Hi,
I get the following error when I execute my EJB client.
Please note that the Client is being run as a standalone JAVA class in Eclipse and the EJB is deployed in JBoss 4.2 (hence they are in separate JVMs)

The Error
java.lang.ClassCastException: org.jboss.serial.io.MarshalledObjectForLocalCalls
at $Proxy0.login(Unknown Source)
at ejb.client.EJBClient.main2(EJBClient.java:33)
at ejb.client.EJBClient.main(EJBClient.java:14)

Client

 
package ejb.client;
 
import java.util.Properties;
 
import javax.naming.Context;
import javax.naming.InitialContext;
 
import com.sample.ejb.DBUtilBeanRemote;
 
public class EJBClient {
 
public static String main(String[] args) {
String result = null;
System.out.println("\nBegin EJBClient...\n");
 
try {
Properties properties = new Properties();
properties.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
properties.put(Context.PROVIDER_URL, "localhost:1099");
properties.put(Context.URL_PKG_PREFIXES,
"org.jboss.naming :-o	 rg.jnp.interfaces");
Context ctx = new InitialContext(properties);
 
Object obj = ctx.lookup("DBUtilBean/remote");
DBUtilBeanRemote remote = (DBUtilBeanRemote) obj;
 
result = remote.login();
System.out.println("The result is " + result);
 
} catch (Exception e) {
System.out.println(" => Error <=");
e.printStackTrace();
}
System.out.println("\nEnd EJB Client...\n");
return result;
}
}
 

EJB Bean

    
package com.sample.ejb;
 
import javax.ejb.Stateless;
 
@Stateless (name="DBUtilBean", mappedName="DBUtilBean")
 
public class DBUtilBean implements DBUtilBeanRemote, DBUtilBeanLocal {
 

public static final String RemoteJNDIName =  DBUtilBean.class.getSimpleName() + "/remote";
 
public static final String LocalJNDIName =  DBUtilBean.class.getSimpleName() + "/local";

public String login() {
 
String x = "ANSWER";
return x;
 
}
 
}
 

Local Interface

 
package com.sample.ejb;
 
import java.io.Serializable;
 
import javax.ejb.Local;;
 
@Local
public interface DBUtilBeanLocal extends Serializable{
 
public String login();

}
 

Remote Interface

 
package com.sample.ejb;
 
import java.io.Serializable;
 
import javax.ejb.Remote;
 
@Remote
public interface DBUtilBeanRemote extends Serializable{
 
public String login();

}
 

Thanks for any help and suggestions
~ Vikas

[Bill Shirley]

If you accidentally double-post (as you did), you can edit one, and in the editing screen, delete.

[Henrique Ordine]

Have you tried narrowing your EJB after the lookup?
Since they're one two different VMs, you're probably getting the remote version of it and I believe a call like PortableRemoteObject.narrow(yourObject, YourObject.class) will be needed.

[Vikas Roonwal]

Hi Henrique,
Thanks for the suggestion. I tried narrowing down, but ended up with the same error.
I am using jboss-4.2.1.GA on windows XP. The client is running as a stand alone code in Eclipse 3.3.1 and has the remote interface in the classpath and also the Jboss jars.
The blunder I made was that the EJB was deployed on Jboss 4.2, but the server jars in eclipse were from Jboss 5.0

I appreciate the help and apologize for my naiveness :-(

[Fabian Gutierrez]

please, post your new client code