You might want to test with some known-good MPI applications first. Try
following the steps in this FAQ item:
https://www.open-mpi.org/faq/?category=running#diagnose-multi-host-problems
> On May 23, 2016, at 2:31 PM, dour...@aol.com wrote:
>
> Jeff, Thank you for your advice.
>
> By bad. I took the wrong shot, because I tested so many different settings.
> After I came back to the original network settings, "permission denied', of
> course disappeared, but the other messages were still there. The master node
> has two NICs, one for WAN (via another server) with zone=external and the
> other for the slave node, zone = internal. The NICs on the master are in
> different subnet.
> NIC on the slave node is set to 'internal'.Their status was confirmed by
> firewall-cmd --get-active-zones.
>
> I temporary stopped firewalld and the error messages disappeared. I saw six
> processes were running on each node, but now the all processes keep running
> forever with 100% CPU usage.
>
>
> -----Original Message-----
> From: Jeff Squyres (jsquyres) <jsquy...@cisco.com>
> To: Open MPI User's List <us...@open-mpi.org>
> Sent: Mon, May 23, 2016 9:13 am
> Subject: Re: [OMPI users] problem about mpirun on two nodes
>
> On May 21, 2016, at 11:31 PM, dour...@aol.com wrote:
>>
>> I encountered a problem about mpirun and SSH when using OMPI 1.10.0 compiled
>> with gcc, running on centos7.2.
>> When I execute mpirun on my 2 node cluster, I get the following errors
>> pasted below.
>>
>> [douraku@master home]$ mpirun -np 12 a.out
>> Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
>
> This is the key right here: you got a permission denied error when you
> (assumedly) tried to execute on the remote server.
>
> Triple check your ssh settings to ensure that you can run on the remote
> server(s) without a password or interactive passphrase entry.
>
> --
> Jeff Squyres
> jsquy...@cisco.com
> For corporate legal information go to:
> http://www.cisco.com/web/about/doing_business/legal/cri/
>
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--
Jeff Squyres
jsquy...@cisco.com
For corporate legal information go to:
http://www.cisco.com/web/about/doing_business/legal/cri/
