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
