RemoteException: java.rmi.UnmarshalException in jdk 1.4.2

Question

i'm implementing an RMI over the jdk 1.4.2 (can't do it in the 1.5 or 1.6) i've seen this topic [http://forum.java.sun.com/thread.jspa?threadID=370196&messageID=1808449] but it didn't help me, or i'm doing something wrong...
i know the RMI code is ok because it runs on java 1.6 (with the automatic generation of stubs and skeletons) but when i change the platform to 1.4 it throws the exception:
RemoteException: java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
java.lang.ClassNotFoundException: servidor.MensageiroImpl_Stub
the VM is configured to use the -Djava.security.policy=C:\Projecto\Policy\permissions.policy both in the client and server
please help me :S i've been burning my head with this for 3 days
i leave my code here:
The interface:
package rmiinterface;
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface Mensageiro extends Remote {
    public void sendMsg(String msg) throws RemoteException;
    public String readMsg() throws RemoteException;
}the implementation:
package servidor;
import rmiinterface.Mensageiro;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
public class MensageiroImpl extends UnicastRemoteObject implements Mensageiro {
    public MensageiroImpl() throws RemoteException {
        super();
    public void sendMsg(String msg) throws RemoteException {
        System.out.println(msg);
    public String readMsg() throws RemoteException {
        return "This is not a Hello World! message";
}the server:
package servidor;
import rmiinterface.Mensageiro;
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
public class MensageiroServer {
    public MensageiroServer() {
        System.setSecurityManager(new RMISecurityManager());
        try {
            Mensageiro m = new MensageiroImpl();
            java.rmi.registry.LocateRegistry.createRegistry(1099);
            System.out.println("RMI registry successfully initiated");
            Naming.rebind("MensageiroService", m);
            System.out.println("Servidor Online");
        } catch (Exception e) {
            System.out.println("Trouble: " + e.getMessage());
    public static void main(String[] args) {
        new MensageiroServer();
}and the client:
package cliente;
import rmiinterface.Mensageiro;
import java.rmi.RMISecurityManager;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.NotBoundException;
import java.net.MalformedURLException;
public class MensageiroClient {
    public MensageiroClient() {
    public static void main(String args[]) {
        System.setSecurityManager(new RMISecurityManager());
        try {
            Mensageiro m = (Mensageiro) Naming.lookup("//localhost/MensageiroService");
            System.out.println(m.readMsg());
            m.sendMsg("Hello World!");
        } catch (MalformedURLException e) {
            System.out.println();
            System.out.println("MalformedURLException: " + e.toString());
        } catch (RemoteException e) {
            System.out.println();
            System.out.println("RemoteException: " + e.toString());
        } catch (NotBoundException e) {
            System.out.println();
            System.out.println("NotBoundException: " + e.toString());
        } catch (Exception e) {
            System.out.println();
            System.out.println("Exception: " + e.toString());
}NOTE: my IDE is Netbeans 6.1. and the client and server are in diffrent projects
thanks in advance
Best Regards,
Carlos Daniel Ribeiro

Answer 1

the stub and the skeleton are being generated, and they are there, in the server project! i don't know why the class defs for the stub filearen't downloded by the client project...I don't know why you think they will be downloaded. They won't be, unless you're using the codebase feature. The client needs the remote interface and the stub on its classpath, and all classes that the remote interface depends on, and so on recursively until closure. You have to do something about that.
It works under 1.6 because it doesn't need the stub at all.