Date: Fri, 21 Nov 2003 12:38:31 +0100 From: Andreas Kohn <andreas.kohn@gmx.net> To: David Israelsson <david@israelsson.org> Cc: freebsd-java@freebsd.org Subject: Re: RMI on FreeBSD Message-ID: <20031121123831.16dc7c27.andreas.kohn@gmx.net> In-Reply-To: <87n0aq6k3p.fsf@poh.gnapp.org> References: <87fzgjbdnq.fsf@poh.gnapp.org> <20031120095224.GR11487@starjuice.net> <877k1vb7tt.fsf@poh.gnapp.org> <20031120121152.GT11487@starjuice.net> <87n0aq6k3p.fsf@poh.gnapp.org>
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On Fri, 21 Nov 2003 12:23:38 +0100
David Israelsson <david@israelsson.org> wrote:
> Sheldon Hearn <sheldonh@starjuice.net> writes:
>
> > What do you expect to happen trying to connect to the local host before
> > a listening service has bound to the appropriate port? I'd expect
> > "Connection refused".
> >
> Of course, that was only to make sure that it connects to the right
> service. No rmiregistry running -> connection refused, rmiregistry
> running -> no exception thrown. Hence, the rmi server successfully
> connects to the rmiregistry.
>
>
> > My original reply simply answered the question "is RMI broken on
> > FreeBSD", for which the answer is probably "no". I'm now guessing. :-)
> >
> Well, there's _something_ with FreeBSD that makes my RMI test case not
> working. Here's a test program that demonstrates the problem:
>
> import java.rmi.*;
> import java.rmi.server.UnicastRemoteObject;
>
> public class RMITest extends UnicastRemoteObject implements Remote
> {
> public RMITest()
> throws RemoteException
> {
> super();
> }
>
> public static void main(String[] args)
> throws Exception
> {
> long millis = System.currentTimeMillis();
> Naming.rebind("//localhost:2001/Test", new RMITest());
> System.out.println("Got here after "
> + ((System.currentTimeMillis() - millis) / 1000)
> + " seconds.");
> }
> }
>
> And here's what I do with it:
>
> poh:~/rmitest> javac RMITest.java
> poh:~/rmitest> rmic RMITest
> poh:~/rmitest> rmiregistry 2001&
> [1] 42631
> poh:~/rmitest> java RMITest
> Got here after 76 seconds.
> poh:~/rmitest>
>
> It should take one or two, possibly three seconds, not 76. And the
> program shouldn't exit afterwards. The same program works exactly
> like it's supposed to when I boot Linux on the same computer.
>
> Yes, it seems like a network problem. What happens in the
> Naming.rebind() method is that the rmi server reports its ip number
> and the port it has allocated, then the rmiregistry tries to contact
> the rmi server on that ip number and port. This is where it fails.
> It works if I first turn off the external interface. In both cases
> (FreeBSD and Linux) I get the same network settings from my isp's dhcp
> server, and a traceroute to the remote ip number from my computer
> indicates that the traffic does not go through any gateways.
>
> Is my system broken? If so, how could I fix it? Can anybody get that
> tiny little test program working?
Hi,
I tried it using jdk 1.4.2p5 on FreeBSD 5.1-CURRENT (Nov 17). Works flawlessly:
[mobile] ~/projects/java>javac RMITest.java
[mobile] ~/projects/java>/usr/local/java/bin/rmic RMITest
[mobile] ~/projects/java>java RMITest
Got here after 0 seconds.
<program continues to run>
--
Andreas Kohn
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