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Subject: Re: [OMPI users] mpirun hang
From: George Bosilca (bosilca_at_[hidden])
Date: 2008-09-17 08:24:31


Looks like a firewall problem. Please check the mailing list archives
for the proper fix.


On Sep 17, 2008, at 6:53 AM, Christophe Spaggiari wrote:

> Hi,
> I am new to MPI and try to get my Open MPI environment up and
> running. I have two machines Alpha and Beta, on which I have
> successfully installed Open MPI in /usr/local/openmpi. I have made
> the ssh setting to not have to enter password manually (using rsa
> keys), and I have modified the .rc files to get the right path and
> right LD_LIBRARY_PATH when login using ssh on both machines.
> In order to check if my installation was working I have started
> "mpirun hostname" on Alpha and it is working just fine.
> I have tested as well "mpirun hostname" on Beta and it is working
> fine too.
> I have tested "ssh beta env" to check that my setting are correct
> and it is working as expected.
> BUT when I am running "mpirun -host beta hostname" from Alpha
> nothing happens. After several minutes I have to kill the "mpirun"
> process with Ctrl-C (two times). Does any of you run into similar
> problem and could tell me what I am doing wrong ? It seems that each
> local installation are working fine but I can not start tasks on
> other nodes.
> The interesting point is that when I run a "ps" on Beta I can see
> that a "orted" process is started (and stay in process list) for
> each of my try to run "mpirun" command from Alpha. So somehow Beta
> gets the command to start orted and does it but then, nothing
> happens .......
> I have been browsing the users list for similar issues and I found
> one guy describing exactly the same problem but it was no answer to
> his post.
> Not sure if this is relevant but Alpha and Beta are Sony PS3
> machines running Yellow Dog Linux 6.1
> Thanks in advance for your help.
> Regards,
> Chris
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