OPAL ERROR: Unreachable in file pmix3x_client.c at line 112

[amirhajibabaei]

version of Open MPI: 4.0.1

installation from source (.tar.gz)

Operating system/version: Ubuntu 18.04

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I have a mpi-aware executable which I run by a command like

mpirun -np 1 ./exe

It's the same, If I open a file named run.sh and in it I write:

./exe

and, I execute by

mpirun -np 1 bash run.sh

But when I want to execute ./exe two consecutive times by modifying run.sh as

./exe
./exe

and invoking by the same mpirun -np 1 bash run.sh command, the second ./exe fails with the following error:

[amir-MS-7A37:11554] OPAL ERROR: Unreachable in file ../../../../../openmpi-4.0.1/opal/mca/pmix/pmix3x/pmix3x_client.c at line 112
*** An error occurred in MPI_Init
*** on a NULL communicator
*** MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort,
***    and potentially your MPI job)

[ggouaillardet]

This is expected, MPI_Init() cannot be invoked twice by the same MPI rank (even if done via two distinct processes)

[amirhajibabaei]

That helped, thanks.

[karanveersingh5623]

This is expected, MPI_Init() cannot be invoked twice by the same MPI rank (even if done via two distinct processes)

Hi , so how can we configure different ranks for MPI ? I am executing mpi using Srun