Anyone successfully using PMIx with OpenMPI and SLURM? I have,
1. Installed an “external” version (1.1.5) of PMIx.
2. Patched SLURM 15.08.13 with the SchedMD-provided PMIx patch (results in an
mpi_pmix plugin along the lines of mpi_pmi2).
3. Built OpenMPI 2.0.1 (tried 2.0.3 as well).
However, when attempting to launch MPI apps (LAMMPS in this case), I get
[c9a-s2.ufhpc:08914] PMIX ERROR: UNREACHABLE in file
src/client/pmix_client.c at line 199
This comes from,
if (PMIX_SUCCESS != (ret=usock_connect((struct sockaddr *)address,
&sd))) {
PMIX_ERROR_LOG(ret);
return ret;
}
I’ve googled and looked at the archives and don’t see any other references to
this error. Don’t really see much about using OpenMPI with pmix at all. I
assumed the “server” side was embedded in orted or some such but maybe not.
What am I missing? Is there some server that needs to be started separately as
with mpd?
Thanks,
Charlie Taylor
Research Computing
University of Florida
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