Re: Orbit, Java, and Windows...

[<dahaverk rockwellcollins com>]

If the PC doesn't know how to "resolve" itself due to a mis-match of trying
to do a dns look up on a non-local subnet DNS you will have problems.    At
least with MICO, (I don't remember what ORBit does) you can use the
parameter "-ORBNoResolv" to keep IP addresses in the IOR.

-Dave





dank@kegel.com@gnome.org on 08/02/2002 06:33:39 PM

Please respond to dank@kegel.com

Sent by:    orbit-list-admin@gnome.org


To:    "Craig W. Wright" <craig.wright@cometsolutions.com>
cc:    orbit-list@gnome.org

Subject:    Re: Orbit, Java, and Windows...


"Craig W. Wright" wrote:
>
> On Sat, 2002-07-06 at 10:32, dank@kegel.com wrote:
> > "Craig W. Wright" wrote:
> > > I brought the client over and I could not get it to connect to the
> > > server process. Actually, it would "dereference" my server's
stringified
> > > object, but I could not call any of the methods on it. The client
would
> > > report a Comm Failure and from what I can tell nothing is getting
over
> > > to the server at all. (This is with Java running under windows and
the
> > > server still under Linux). I also have JDK 1.3.1 for Windows.
> > >
> > > So I ran a couple of tests. I setup an "echo" client/server written
with
> > > orbit and java. The client was running on windows in Java and the
> > > servers on my Linux box. The windows box was able to connect to the
> > > Linux box when I ran the Java server, but I got the same errors as
> > > before when I tried to connect to the ORBit server.
> > >
> > > Has anyone heard of this before? Basically Java on Windows won't
> > > communicate with ORBit, but Java under Linux will.
> >
> > Say, might this be the old "can't ping the server from the
> > client using the hostname reported on the server by /bin/hostname"
> > problem?  Could be a DNS problem.
>
> Does IIOP depend upon DNS is some way. I figured a numeric IP address to
> be packaged in the IOR, although I must admit I don't know a lot about
> CORBA. I can ping the machine based on its hostname though.

Yes, it does depend on DNS, it can embed hostnames in the IOR.

> > If that's not it, can you use Ethereal or windump or whatever
> > and get a packet trace to verify your suspicion that the
> > client on Windows is not sending any packets to the server?
>
> I used ethereal on my server and realized that there are no packets
> arriving that are originated by the client program.

Yeah, now run etherreal or windump *on your client*, and
see where the dang packets are going!  It might even be stuck doing dns...

- Dan
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