RMI apps will not exit for 60 seconds.

Question

Yes, I'm sure this has been asked more times than you can fit in a 32 bit int, but how can I get my RMI programs to exit when main() exits. Even seemingly innocent programs like this:
import java.rmi.*;
import java.rmi.server.*;
public class Stuff {
public static void main (String[] argv) {
try {
Hello local = new Hello("Hello, world!");
catch(Exception x) {
x.printStackTrace();
(where Hello is completely brain-dead stupid-simple object of type Remote) will not exit immediately.
I've tried adding calls to System.gc() after the catch block above, but to no avail.
My real problem is that I'm not just using Remote objects in my server, but also in my client. (My server objects need to be able to make calls to my client autonomously.) I wouldn't really care if the servers didn't exit with immediacy, but I don't want to have to tell other developers in my group that they have to add System.exit() in all their client applications to make use of my new RMI-based utilities. And I don't want them having to ctrl-c out of everything.
What can I do?
Thanks,
Matt

Answer 1

Dear Klagdon,
Thanks for the good information. I'll try this out and try to read more of the API docs; however, your response makes me wonder if I should be implementing my client-side remote objects in a different way (not using UnicastRemoteObject) so that the call to unexportObject() would not be necessary.
Roughly I want to do something like this with my clients:
public static void main(String[] args) {
    try {
        Client c = new Client();
        ServerInterface s = (ServerInterface) Naming.lookup("//somehost.foo.com/Server");
        s.register(c);
        // do stuff
        s.unregister(c);
    catch(Exception x) {
        x.printStackTrace();
}In particular, my Client Remote objects will never be placed in an RMI registry and only need to be contacted by my Server objects between the register and unregister calls.
Although I'm confident I can get this to work, any direction you can give me to implement this "correctly" would be appreciated. In particular, I do want the above application to exit gracefully and with immediacy after the unregister call.
Thanks again for your help
Matt Busche