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Subject: Re: [OMPI users] Unexpected warning/return from mpirun with minimal MPI program
From: Ralph Castain (rhc_at_[hidden])
Date: 2012-02-19 22:53:28


If your program returns an error status (i.e., a non-zero exit status), then mpirun passes that along to you so any script you are using can know that something failed.

On Feb 19, 2012, at 7:41 PM, Truls Edvard Stokke wrote:

> Hi,
>
> In running this minimal program (test.c)
>
> #include <stdlib.h>
> #include <mpi.h>
>
> int main (int argc, char ** argv) {
> MPI_Init(&argc, &argv);
> MPI_Finalize();
>
> exit(EXIT_FAILURE);
> }
>
> compiled and ran with the commands
>
> mpicc test.c
> mpirun -n 1 a.out
>
> I get the output
>
> --------------------------------------------------------------------------
> mpirun noticed that the job aborted, but has no info as to the process
> that caused that situation.
> --------------------------------------------------------------------------
>
> The return value of mpirun is 1 (presumably the value of EXIT_FAILURE) instead of the expected 0.
> Citing the manual page of mpirun, "mpirun returns 0 if all ranks started by mpirun exit after calling MPI_FINALIZE." which should be the case in the program.
>
> If EXIT_FAILURE is changed to EXIT_SUCCESS there is no output and mpirun returns 0 as expected.
>
> My OpenMPI version is 1.5.4, the code and output from ompi_info --all is attached.
>
> If it is relevant my OS is Fedora 16 and the packages installed are openmpi.i686 and openmpi-devel.i686, the code is ran at a single node with a single Intel atom processor. I have also ensured that no calls to MPI_Init or MPI_Finalize have been optimized out by the compiler.
> <ompi_info_output.txt><test.c>_______________________________________________
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