You're trying to narrow a directory context. You don't need to narrow an EJB3 and you should lookup the remote instead.

Please try:

MyRemote bean = (MyRemote) ctx.lookup("MyBean/remote");

With that deployment descriptor it's:

MyRemote bean = (MyRemote) ctx.lookup("MyBean");

Open JNDIView (at http://localhost:8080/jmx-console/ by default) use the "list" method and look for Your beans in "Global JNDI Namespace" to find out what are the JNDI Names.

I had a similar problem.

i got the same exception, any tips?
none of the tips posted here works....

i have the same descriptors.. same scenario..
the 1st code was auto generated by netbeans 6

java.lang.ClassCastException
 com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:229)
 javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
 cl.imagicair.ldap.DatosLdap.lookupLdapInfo2Bean(DatosLdap.java:99)
 cl.imagicair.ldap.DatosLdap.processRequest(DatosLdap.java:35)
 cl.imagicair.ldap.DatosLdap.doGet(DatosLdap.java:68)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

causa ra�z

java.lang.ClassCastException: $Proxy141 cannot be cast to org.omg.CORBA.Object
 com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:212)
 javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
 cl.imagicair.ldap.DatosLdap.lookupLdapInfo2Bean(DatosLdap.java:99)
 cl.imagicair.ldap.DatosLdap.processRequest(DatosLdap.java:35)
 cl.imagicair.ldap.DatosLdap.doGet(DatosLdap.java:68)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

Hi!

I have the same error however I try to run EJB2.1 beans that were running well on JBoss 4.0.0.CR2 with JBoss 4.2.2.GA.

Should I migrate my EJB2.1 beans (and XML descriptors)? I have read that it is possible to use EJB2.1 and EJB3 together.

Thanks,
Volodymyr

Use casting and narrowing to remote home interface.

Pavol

Dear Sir,

I am new to ejb, my problem is when i run my client program i get this error.
Anyone suggest me what i am doing wrong...........

This is my Exception which is generated during the client program execute.......

Exception in thread "main" java.lang.ClassCastException
at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:229)
at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
at Client.main(Client.java:27)
Caused by: java.lang.ClassCastException: $Proxy0 cannot be cast to org.omg.CORBA.Object
at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:212)
... 2 more

Could anyone tell me what I’m doing wrong? Thanks a lot. Looking forward to hearing from you.

These are my code..........

********remote interface*******
package My;

import java.rmi.*;

import javax.ejb.*;

public interface DemoInter extends EJBObject
{
public int add() throws RemoteException;
}

************home interface***********
package My;

import javax.ejb.*;
import java.rmi.*;



public interface DemoHome extends EJBHome
{
public DemoInter create(int a, int b) throws CreateException,RemoteException;
}
*************bean class*************

package My;

import javax.ejb.*;
import java.rmi.*;

public class DemoBean implements SessionBean
{
int a,b;
private SessionContext context;
public void setSessionContext(SessionContext ctx){this.context=ctx}

public void ejbCreate( int a,int b)
{
this.a=a;
this.b=b;
System.out.println("ejb Created");
}

public void ejbActivate(){System.out.println("ejbActivate()");}
public void ejbPassivate(){System.out.println("ejbPassivate()");}
public void ejbRemove(){System.out.println("distroyed");}
public int add() throws RemoteException
{
return(a+b);
}
}



***********my client**************




import java.util.*;
import javax.rmi.PortableRemoteObject;
import javax.naming.*;
import javax.rmi.*;
import My.*;


public class Client {

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

Properties properties=new Properties();
properties.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory");
properties.put("java.naming.provider.url","ejbd://localhost:4201");

Context ctx=new InitialContext(properties);
System.out.println("ic = " + ctx);

//MyTimeLocal myTimeLocal = (MyTimeLocal)context.lookup("java:comp/env/ejb/MyTimeBean");
// My.DemoInter remoteObj =(My.DemoInter)ctx.lookup("ejb/mgmt/MEJBRemoteHome");
Object object=ctx.lookup("ejb/mgmt/MEJBRemoteHome");
// System.out.println("hello" +object);
My.DemoHome ejbHome =(My.DemoHome)PortableRemoteObject.narrow(object,My.DemoHome.class);
System.out.println("hello" +ejbHome);
My.DemoInter obj1=ejbHome.create(4,5);
System.out.println(obj1.add());





} catch (Exception e) {
System.out.println(e);
// TODO: handle exception
}



}

}


this is log file..........

13:02:24,839 INFO [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'
13:02:30,987 INFO [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'
13:02:34,611 INFO [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'
13:02:35,732 INFO [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'
13:02:40,045 INFO [config] Configuring Service(id=Default Stateless Container, type=Container, provider-id=Default Stateless Container)
13:02:40,045 INFO [config] Configuring Service(id=Default Stateful Container, type=Container, provider-id=Default Stateful Container)
13:02:40,045 INFO [config] Configuring Service(id=Default BMP Container, type=Container, provider-id=Default BMP Container)
13:02:40,046 INFO [config] Configuring Service(id=Default CMP Container, type=Container, provider-id=Default CMP Container)
13:02:40,046 INFO [config] Configuring app: default/ejbsample1.jar/1207553559310/jar
13:02:40,078 INFO [OpenEJB] Auto-deploying ejb DemoEJB: EjbDeployment(deployment-id=ejbsample1.jar/DemoEJB)
13:02:40,079 INFO [config] Loaded Module: default/ejbsample1.jar/1207553559310/jar
13:02:40,976 INFO [startup] Assembling app: /home/atul/santemp/geronimo-tomcat6-javaee5-2.1/var/temp/geronimo-deployer17419.tmpdir/ejbsample1.jar
13:02:40,985 INFO [startup] Jndi(name=DemoEJBRemoteHome) --> Ejb(deployment-id=ejbsample1.jar/DemoEJB)
13:02:40,985 INFO [startup] Created Ejb(deployment-id=ejbsample1.jar/DemoEJB, ejb-name=DemoEJB, container=Default Stateless Container)
13:02:40,985 INFO [startup] Deployed Application(path=/home/atul/santemp/geronimo-tomcat6-javaee5-2.1/var/temp/geronimo-deployer17419.tmpdir/ejbsample1.jar)
13:02:41,083 INFO [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'

This part looks odd to me:

Properties properties=new Properties();
properties.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory");
properties.put("java.naming.provider.url","ejbd://localhost:4201");

Properties props = new Properties();
 props.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
 props.put(Context.PROVIDER_URL,"jnp://localhost:1099");
 props.put(Context.URL_PKG_PREFIXES,"org.jboss.naming.jnp.interfaces");

He's not using JBoss (or is but has gotten his jndi parameters from something completely different).
He's not using EJB3, so he's asking his question in the wrong forum.
He's hijacking a dead thread for an unrelated message.

And finally he's trying to narrow his EJB stub to the home interface instead of the remote interface.