Thread: rmi problems

i'm trying to create a basic hello world for rmi .

server code:

import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.UnknownHostException;
import java.rmi.AlreadyBoundException;
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
 
 
public class server extends UnicastRemoteObject implements dostuff{
 
	protected server() throws RemoteException {
 
 
	}
 
 
 
	public static void main(String args[])
	{
		System.setSecurityManager(new RMISecurityManager());
 
		try {
			String computername=InetAddress.getLocalHost().getHostName();
			server s = new server();
			try {
				Naming.bind("//"+computername+"/server", s);
				System.out.println("server started");
			} catch (MalformedURLException e) {
 
				e.printStackTrace();
			} catch (AlreadyBoundException e) {
 
				e.printStackTrace();
			}
		} catch (RemoteException e) {
 
			e.printStackTrace();
		} catch (UnknownHostException e) {
 
			e.printStackTrace();
		}
	}
 
 
 
	@Override
	public String doesitwork() {
 
		return "yes";
	}
 
}

interface:


i

mport java.rmi.*;
 
 
 interface dostuff extends Remote{
 
	public String doesitwork() throws RemoteException;
 
}

i run the server in eclipse with VM arguments -Djava.rmi.server.codebase=${container_loc} -Djava.security.policy policy.txt. the policy just gives all permissions.

i get the exception

Java.rmi.unmarshalException Error unmarshalling return; nested exception is:
java.net.malformedURLException: unknown protocol g
etc.

the external hard drive my java projects is on shows up as G:.

what's the problem here?

Looks like some code is eating a full path as a URL: G:\folder\subfolder\...
URLs start with a protocol followed by a :
so G:\ would look like protocol G

thought so. how can i fix this?

Where is it getting the G: from?

Does the error message have a source code line number in it? the 'etc.' in your post probably showed it.

it's coming form the Naming.Bind() call, i think.

Why do you think that?
Can you post ALL of the error message?

java.rmi.UnmarshalException: Error unmarshaling return; nested exception is:
java.net.MalformedURLException: unknown protocol: g
at sun.rmi.transport.StreamRemoteCall.executeCall(Unk nown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)
at java.rmi.Naming.bind(Unknown Source)
at server.main(server.java:29)
Caused by: java.net.MalformedURLException: unknown protocol: g
at java.net.URL.<init>(Unknown Source)
at java.net.URL.<init>(Unknown Source)
at java.net.URL.<init>(Unknown Source)
at sun.rmi.server.LoaderHandler.pathToURLs(Unknown Source)
at sun.rmi.server.LoaderHandler.getDefaultCodebaseURL s(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader$2.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader.loadClass(Unknown Source)
at sun.rmi.server.MarshalInputStream.resolveClass(Unk nown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unkno wn Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
... 5 more


this is what showed up in the eclipse console

java.net.MalformedURLException: unknown protocol: g

Did you ever resolve where the "g" was coming from?
Are you using a disk (g:/)address instead of an http:// address?