Public bug reported:
The MPICH package in Ubuntu 24.04 is linked with libpmix, which is
incompatible with the Hydra process manager. Applications linked with
MPICH and launched with Hydra (mpiexec) will not be able to gather
process identity information, leading each process to belong to an
MPI_COMM_WORLD of size=1.
After inspecting the configuration in `mpichversion`, we (the MPICH
developers) believe that this option should be removed when building the
MPICH binary: `--with-pmix=/usr/lib/aarch64-linux-gnu/pmix2`.
Please let us know if you have any questions.
Thank you,
Ken Raffenetti
Research Software Engineer
Argonne National Laboratory
** Affects: mpich (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2072338
Title:
incorrect PMI configuration
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