Difficulty running RMI server, Red Hat 7.0

[Arsin Delve]

I'm trying to get a very simple RMI client/server working without success. The example is right out of a text book (Mastering EJB by Roman) and I haven't done anything to the code except compile it. When I run the server on my Linux machine and clients attempt to access it, they get an AccessControlException: access denied. This happens as root or any other user, local client or remote and with any number of different ports. When the server runs on my Windows PC, no problems occur.
If anyone has any suggestions, I would really appreciate it. Thanks!
Arsin Delve.

[Arsin Delve]

I was mistaken - it does not work in Windows either so this is not a Linux problem and should not be in this topic. Sorry
-Arsin

[Sean Casey]

Have you ever had problems running rmi before?

[Arsin Delve]

This is the first RMI thing I've ever done. I've just started learning about it today.

[Sean Casey]

Did you use rmic to produce the stub and skeleton classes?
The reason I ask is that I use rmi without any problems on Redhat 7.0.

[This message has been edited by Sean Casey (edited July 11, 2001).]

[Arsin Delve]

Sean: Yes I did. First I used the stubs and skeletons that were provided on the CD, and when that didn't work I recompiled the source and recreated them. Same error.
I apologize once again for posting this in a Linux area. It appeared at first to be a Linux issue, but when I investigated further I realized I get the same error in Windows.

[Sean Casey]

You might have better luck posting this in the rmi/corba forum. You can post your source code if you like, I'll take a look at it, but no gurantees.

[Arsin Delve]

Ok, here goes:

import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.Naming;
public class FlipClient implements Remote {

public static void main (String[] args) { 
IFlip flip = null;
/*
 * Do some parameter checking..
 */
if (args.length != 2) {
System.err.println("Usage: Flip <hostname of Flip remote object> <port>");
System.exit(-1);
}

/*
 * Set the security manager (required since we may be downloading implementation)
 */
try {
System.setSecurityManager(new java.rmi.RMISecurityManager());
}
catch (java.rmi.RMISecurityException exc) {
System.err.println("Security violation " + exc.toString());
System.exit(-1);
}

/*
 * Get a handle to a remote Flip object.
 */
try {
/*
 * We use an RMI URL to locate the remote object.
 * We construct the RMI URL from the
 * parameters passed from the end user.
 */
String targetMachine = "rmi://" + args[0] + ":" + args[1] + "/Flip";
System.out.println("Attempting to contact " + targetMachine);

/*
 * Get the object from the remote RMI Registry
 */
Remote remoteObject = Naming.lookup(targetMachine);

/*
 * Perform a quick check to make sure the object
 * is of the expected IFlip interface type.
 */
if (remoteObject instanceof IFlip) {
flip = (IFlip) remoteObject;
}
else {
throw new Exception("Bad object returned from remote machine");
}
}
catch (Exception e) {
System.err.println("Error in lookup() " + e.toString());
System.exit(-1);
}

/*
 * Print the result of flipping 5.  We're actually
 * invoking on a stub here, which delegates across the
 * network to the real object.
 */
try {
System.err.println(flip.flip(5));
}
catch (RemoteException e) {
System.err.println("Remote error: " + e.toString());
}
}
}

[Sean Casey]

Is that it or do you have another file? You seem to be missing some stuff. You haven't created a server??
There are a lot more details. You should check out this link. It's to Bruce Eckel's Thinking in Java. It's free, and a very good book. He has a nice small example on page 974.
www.mindview.net/Books/TIJ/
I hope that helps. Sorry I can't go over your whole program. He has a small example that is really good. I think you'd be better off than having me try to explain it to you.
- Sean