Open MPI requires that each MPI process be able to connect to any
other MPI process in the same job with random TCP ports. It is
usually easiest to leave the firewall off, or setup trust
relationships between your cluster nodes.
On May 12, 2009, at 6:04 AM, feng chen wrote:
thanks a lot. firewall it is.. It works with firewall's off, while
that brings another questions from me. Is there anyway we can run
mpirun while firwall 's on? If yes, how do we setup firewall or
iptables?
thank you
From: Micha Feigin <mi...@post.tau.ac.il>
To: us...@open-mpi.org
Sent: Tuesday, May 12, 2009 4:30:30 AM
Subject: Re: [OMPI users] mpirun fails on remote applications
On Tue, 12 May 2009 11:54:57 +0300
Lenny Verkhovsky <lenny.verkhov...@gmail.com> wrote:
> sounds like firewall problems to or from anfield04.
> Lenny,
>
> On Tue, May 12, 2009 at 8:18 AM, feng chen <fch6...@yahoo.com>
wrote:
>
I'm having a similar problem, not sure if it's related (gave up for
the moment
on 1.3+ openmpi, 1.2.8 works fine nothing above that).
1. Try taking down the firewall and see if it works
2. Make sure that passwordless ssh is working (not sure if it's
needed for all
things but still ...)
3. can you test it maybe with openmpi 1.2.8?
4. also, does posting the job in the other direction work? (4 -> 5
instead of 5 -> 4)
[fch6699@anfield04 test]$ mpirun -host anfield05 -np 4 ./hello
>From what it seems on my cluster for my specific problem is that
machines have
different addresses based on which machine you are connecting from
(they are
connected directly to each other, not through a switch with a
central name
server), and name lookup seems to happen on the master instead of
the client
node so it is getting the wrong address.
> > hi all,
> >
> > First of all,i'm new to openmpi. So i don't know much about mpi
setting.
> > That's why i'm following manual and FAQ suggestions from the
beginning.
> > Everything went well untile i try to run a pllication on a
remote node by
> > using 'mpirun -np' command. It just hanging there without doing
anything, no
> > error messanges, no
> > complaining or whatsoever. What confused me is that i can run
application
> > over ssh with no problem, while it comes to mpirun, just stuck
in there does
> > nothing.
> > I'm pretty sure i got everyting setup in the right way manner,
including no
> > password signin over ssh, environment variables for bot
interactive and
> > non-interactive logons.
> > A sample list of commands been used list as following:
> >
> >
> >
> >
> > [fch6699@anfield05 test]$ mpicc -o hello hello.f
> > [fch6699@anfield05 test]$ ssh anfield04 ./hello
> > 0 of 1: Hello world!
> > [fch6699@anfield05 test]$ mpirun -host anfield05 -np 4 ./hello
> > 0 of 4: Hello world!
> > 2 of 4: Hello world!
> > 3 of 4: Hello world!
> > 1 of 4: Hello world!
> > [fch6699@anfield05 test]$ mpirun -host anfield04 -np 4 ./hello
> > just hanging there for years!!!
> > need help to fix this !!
> > if u try it in another way
> > [fch6699@anfield05 test]$ mpirun -hostfile my_hostfile -np 4 ./
hell
> > still nothing happened, no warnnings, no complains, no error
messages.. !!
> >
> > All other files related to this issue can be found in
my_files.tar.gz in
> > attachment.
> >
> > .cshrc
> > The output of the "ompi_info --all" command.
> > my_hostfile
> > hello.c
> > output of iptables
> >
> > The only thing i've noticed is that the port of our ssh has been
changed
> > from 22 to other number for security issues.
> > Don't know will that have anything to with it or not.
> >
> >
> > Any help will be highly appreciated!!
> >
> > thanks in advance!
> >
> > Kevin
> >
> >
> >
> >
> > _______________________________________________
> > users mailing list
> > us...@open-mpi.org
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
> >
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Jeff Squyres
Cisco Systems
