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Subject: Re: [OMPI users] PML add procs failed --> Returned "Unreachable" (-12) instead of "Success" (0)
From: Ralph Castain (rhc_at_[hidden])
Date: 2009-03-26 11:07:05


Hi Alex

The problem is likely to be that there is no connection available
between grid03 and grid04. Did you create/define an Ethernet/IP
interface directly between those two virtual machines?

Otherwise, there is no way for MPI to communicate between them.

Ralph

On Mar 26, 2009, at 9:00 AM, Alessandro Surace wrote:

> Hi Guys,
> I'm really new in mpi. I've created a small grid composed of virtual
> and
> real host.
> grid01 real/Centos/(Open MPI) 1.2.5
> grid03 virtual (xen)/Centos/(Open MPI) 1.2.5
> grid04 virtual (vmware)/Centos/(Open MPI) 1.2.5
>
> When I try to run a parallel job like this:
> mpirun -v -H grid01,grid04 -np 2 /mnt/ewd/mpi/fibonacci/
> fibonacci_mpi
> The job run
>
> If I try instead
> mpirun -v -H grid03,grid04 -np 2 /mnt/ewd/mpi/fibonacci/
> fibonacci_mpi
> or with all 3 nodes I get the error:
>
> It looks like MPI_INIT failed for some reason; your parallel process
> is
> likely to abort. There are many reasons that a parallel process can
> fail during MPI_INIT; some of which are due to configuration or
> environment
> problems. This failure appears to be an internal failure; here's some
> additional information (which may only be relevant to an Open MPI
> developer):
>
> PML add procs failed
> --> Returned "Unreachable" (-12) instead of "Success" (0)
>
> Seems like there is something wrong between grid03, grid04.
> But If I run the job indivdually on every host it runs without
> problem.
>
> I can't understand what happens.
> Any Ideas?
> In attach all the details.
> But Does Exist a guide / howto configure and setup openmpi (not
> build) ?
>
> Thanks
> Alex
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