RMI RemoteException Problem

[Aaron D]

Hi all,

I am experimenting with creating a very basic IM app in which two or more clients can connect to a server, and send messages, which will then be broadcast to all clients. I am using RMI so that upon sending a message to the server, the client can then invoke the method on the server to read a stream and then process the input accordingly.

However when I try and run the server, I get a RemoteException. Here is my code to initialize the server;

public Server() throws RemoteException
	{
		try
		{
			Naming.rebind("Aaron_Server", this);
		}
		catch(MalformedURLException e)
		{
			System.out.println("Error Block 1: " + e);
		}
		
		try
		{
			System.out.println("Bound");
			ServerSocket listener = new ServerSocket(1234);
			client = listener.accept();
		}
		catch(Exception e)
		{
			System.out.println("Error Block 2: " + e);
		}
		try
		{
			in = client.getInputStream();
			out = client.getOutputStream();
			RClient = (RemoteClient)Naming.lookup("rmi://localhost/IM_Client");
			ServerRun.addClient(RClient.getName());
		}
		catch (IOException ioe)
		{
			System.out.println("Error Block 3: " + ioe);
		}
		catch (NotBoundException nbe)
		{
			System.out.println("Error Block 4: " + nbe);
		}
	}

This seams to run without throwing any of these errors, however the class with the main() method that initialises the server throws the following error:

Error Block 7: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
	java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
	java.lang.ClassNotFoundException: com.aaron_durant.im_server.RemoteServer

Here is the code from the main() method:

try 
		{
			svr1 = new Server();
			System.out.println("Created");
		} 
		catch (Exception e)
		{
			System.out.println("Error Block 7: " + e);
		}

Eclipse forces me to declare that the constructor for the server throws a RemoteException, but I do not understand why it is being thrown as the code seems to run properly. However this error stops me from connecting a client to it.

Please could someone explain this problem to me and help me to fix it.

Thanx

Aaron

[achmadlutfi]

try to change "Naming.rebind("Aaron_Server", this);" with your ip address. Hope this can help you.