Charles,

did you build Open MPI with the external PMIx ?
iirc, Open MPI 2.0.x does not support cross version PMIx

Cheers,

Gilles

On Sun, Aug 6, 2017 at 7:59 PM, Charles A Taylor <chas...@ufl.edu> wrote:
>
>> On Aug 6, 2017, at 6:53 AM, Charles A Taylor <chas...@ufl.edu> wrote:
>>
>>
>> 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
>>
> I should have mentioned that I’m launching with
>
>    srun —mpi=pmix …
>
> If I launch with
>
>   srun —mpi=pmi2 ...
>
> the app starts and runs without issue.
>
>
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