Looks strange. I’m pretty sure Mellanox didn’t implement the event notification 
system in the Slurm plugin, but you should only be trying to call it if OMPI is 
registering a system-level event code - which OMPI 3.1 definitely doesn’t do.

If you are using PMIx v2.2.0, then please note that there is a bug in it that 
slipped through our automated testing. I replaced it today with v2.2.1 - you 
probably should update if that’s the case. However, that wouldn’t necessarily 
explain this behavior. I’m not that familiar with the Slurm plugin, but you 
might try adding

PMIX_MCA_pmix_client_event_verbose=5
PMIX_MCA_pmix_server_event_verbose=5
OMPI_MCA_pmix_base_verbose=10

to your environment and see if that provides anything useful.

> On Jan 18, 2019, at 12:09 PM, Michael Di Domenico <mdidomeni...@gmail.com> 
> wrote:
> 
> i compilied pmix slurm openmpi
> 
> ---pmix
> ./configure --prefix=/hpc/pmix/2.2 --with-munge=/hpc/munge/0.5.13
> --disable-debug
> ---slurm
> ./configure --prefix=/hpc/slurm/18.08 --with-munge=/hpc/munge/0.5.13
> --with-pmix=/hpc/pmix/2.2
> ---openmpi
> ./configure --prefix=/hpc/ompi/3.1 --with-hwloc=external
> --with-libevent=external --with-slurm=/hpc/slurm/18.08
> --with-pmix=/hpc/pmix/2.2
> 
> everything seemed to compile fine, but when i do an srun i get the
> below errors, however, if i salloc and then mpirun it seems to work
> fine.  i'm not quite sure where the breakdown is or how to debug it
> 
> ---
> 
> [ec2-user@labcmp1 linux]$ srun --mpi=pmix_v2 -n 16 xhpl
> [labcmp6:18353] PMIX ERROR: NOT-SUPPORTED in file
> event/pmix_event_registration.c at line 101
> [labcmp6:18355] PMIX ERROR: NOT-SUPPORTED in file
> event/pmix_event_registration.c at line 101
> [labcmp5:18355] PMIX ERROR: NOT-SUPPORTED in file
> event/pmix_event_registration.c at line 101
> --------------------------------------------------------------------------
> It looks like MPI_INIT failed for some reason; your parallel process is
> likely to abort.  There are many reasons that a parallel process can
> fail during MPI_INIT; some of which are due to configuration or environment
> problems.  This failure appears to be an internal failure; here's some
> additional information (which may only be relevant to an Open MPI
> developer):
> 
>  ompi_interlib_declare
>  --> Returned "Would block" (-10) instead of "Success" (0)
> ...snipped...
> [labcmp6:18355] *** An error occurred in MPI_Init
> [labcmp6:18355] *** reported by process [140726281390153,15]
> [labcmp6:18355] *** on a NULL communicator
> [labcmp6:18355] *** Unknown error
> [labcmp6:18355] *** MPI_ERRORS_ARE_FATAL (processes in this
> communicator will now abort,
> [labcmp6:18355] ***    and potentially your MPI job)
> [labcmp6:18352] *** An error occurred in MPI_Init
> [labcmp6:18352] *** reported by process [1677936713,12]
> [labcmp6:18352] *** on a NULL communicator
> [labcmp6:18352] *** Unknown error
> [labcmp6:18352] *** MPI_ERRORS_ARE_FATAL (processes in this
> communicator will now abort,
> [labcmp6:18352] ***    and potentially your MPI job)
> [labcmp6:18354] *** An error occurred in MPI_Init
> [labcmp6:18354] *** reported by process [140726281390153,14]
> [labcmp6:18354] *** on a NULL communicator
> [labcmp6:18354] *** Unknown error
> [labcmp6:18354] *** MPI_ERRORS_ARE_FATAL (processes in this
> communicator will now abort,
> [labcmp6:18354] ***    and potentially your MPI job)
> srun: Job step aborted: Waiting up to 32 seconds for job step to finish.
> slurmstepd: error: *** STEP 24.0 ON labcmp3 CANCELLED AT 2019-01-18T20:03:33 
> ***
> [labcmp5:18358] PMIX ERROR: NOT-SUPPORTED in file
> event/pmix_event_registration.c at line 101
> --------------------------------------------------------------------------
> It looks like MPI_INIT failed for some reason; your parallel process is
> likely to abort.  There are many reasons that a parallel process can
> fail during MPI_INIT; some of which are due to configuration or environment
> problems.  This failure appears to be an internal failure; here's some
> additional information (which may only be relevant to an Open MPI
> developer):
> 
>  ompi_interlib_declare
>  --> Returned "Would block" (-10) instead of "Success" (0)
> --------------------------------------------------------------------------
> [labcmp5:18357] PMIX ERROR: NOT-SUPPORTED in file
> event/pmix_event_registration.c at line 101
> [labcmp5:18356] PMIX ERROR: NOT-SUPPORTED in file
> event/pmix_event_registration.c at line 101
> srun: error: labcmp6: tasks 12-15: Exited with exit code 1
> srun: error: labcmp3: tasks 0-3: Killed
> srun: error: labcmp4: tasks 4-7: Killed
> srun: error: labcmp5: tasks 8-11: Killed
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