IIOP impl. export ok but toStub() failed, NoSuchObjectException!!!

Question

My jre version is 1.4.2_05-b04. I'm using IIOP implementation with RMI.
I created my remote service, and then export the service with PortableRemoteObject.exportObject(), everything seemd ok. But when I try to get service stub with PortableRemoteObject.toStub(), I got a NoSuchObjectException indicating my service was not exported!!! But why exportObject() did throw any exception?
Here is my code:
package wuwei.rmi.server;
import java.io.IOException;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.util.Enumeration;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;
import wuwei.rmi.intf.EchoServiceIF;
public class Server
    static private final Properties sysProps = new Properties();
    static
        initialization();
    private static boolean initialization()
            // 1. load properties from config file
            try
                sysProps.load( ClassLoader.getSystemResourceAsStream("config.ini") );
            catch (IOException ioe)
                ioe.printStackTrace();
                return false;
            System.out.println("read properties from config file:");
            for (Enumeration names = sysProps.propertyNames();
                 names.hasMoreElements(); )
                String prop_name  = (String) names.nextElement();
                String prop_value = sysProps.getProperty(prop_name);
                System.out.println(prop_name + "=" + prop_value);
            System.out.println("----------------------------\n");
        // 2. set codebase system property
        System.setProperty(
            "java.rmi.server.codebase",
            sysProps.getProperty("java.rmi.server.codebase")
        return true;
    public static void main(String[] args)
        // 1. create service object
        EchoServiceIF service = new EchoServiceImpl();
        System.out.println("create service ok.");
        // 2. export to be available for IIOP invocation
        Remote _stub = null;
        try
            PortableRemoteObject.exportObject(service);
            _stub = (Remote) PortableRemoteObject.toStub(service);
            System.out.println("export service ok.");
        catch (RemoteException re)
            re.printStackTrace();
            return;
        // 3. bind stub to Registry
        Context namingCtx = null;
        try
            namingCtx = new InitialContext(sysProps);
            namingCtx.rebind("echo", _stub);
            System.out.println("bind service to RMI Registry ok.");
        catch (NamingException ne)
            ne.printStackTrace();
        finally
            try {
                if (namingCtx != null) {
                    namingCtx.close();
            } catch (NamingException ne) {
                ne.printStackTrace();
}Here is the config file config.ini:
java.rmi.server.codebase=http://192.168.1.66:8080/RMI_codebase/codebase.jar
java.naming.factory.initial=com.sun.jndi.cosnaming.CNCtxFactory
java.naming.provider.url=iiop://localhost:1050Is there anyone who can help me? Thank you very much!

Answer 1

Dunno, but the stub is also returned by PortableRemoteObject.exportObject() so you don't need the toStub() call at all. Also you don't really need the stub at the server side, you can bind the server object itself to the naming service and it will sort all that out behind the scenes for you.
BTW does EchoServiceImpl extend UnicastRemoteObject by any chance? It mustn't if you want RMI/IIOP. In fact it would normally extend PortableRemoteObject, in which case you can get rid of the exportObject() call too.