Subject: Re: [OMPI users] Problem with GNU GFortran OpenMPI 1.3.0
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2009-06-22 16:18:18
This error message is indicating that MPI_Comm_f2c is being invoked
before MPI_INIT.
Can you see if that is happening?
If it helps, you can run with the MCA parameter mpi_abort_print_stack
set to 1. This will print the stack when we abort. Or run with the
MCA parameter mpi_abort_delay set to -1; this will print the abort
message but then spin forever (i.e., not abort), which allows you to
attach a debugger to the MPI processes and poke around to figure out
what went wrong.
See http://www.open-mpi.org/faq/?category=debugging#debug-ompi-
controls for a full list of the MCA parameters that we have to help
debugging.
On Jun 22, 2009, at 4:14 PM, Si Hammond wrote:
> Hi everyone,
>
> Another little mystery for you all!
>
> I have a relatively small MPI Fortran code which I can compile
> successfully with Intel and PGI compiled OpenMPI 1.3.0 (and 1.2.5).
> No problems with this.
>
> On a separate machine I have a GNU Gfortran 4.3 OpenMPI 1.3.0
> installation and I get these errors immediately after the code
> starts running:
>
> *** An error occurred in MPI_Comm_f2c
> *** before MPI was initialized
> *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
> [***:19386] Abort before MPI_INIT completed successfully; not able
> to guarantee that all other processes were killed!
> *** An error occurred in MPI_Comm_f2c
> *** before MPI was initialized
> *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
> [***:13269] Abort before MPI_INIT completed successfully; not able
> to guarantee that all other processes were killed!
> *** An error occurred in MPI_Comm_f2c
> *** before MPI was initialized
> *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
> <etc>
>
>
> So, it looks like there might be a bug with GFortran or do you think
> this is OpenMPI?
>
> Any help you have would be appreciated, I can't seem to find much on
> this using Google.
>
>
>
>
> Si Hammond
>
> Performance Modelling, Analysis and Optimisation Team
> High Performance Systems Group
> Department of Computer Science
> University of Warwick, CV4 7AL, UK
>
>
>
>
>
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-- Jeff Squyres Cisco Systems