Re: [slurm-users] problems with slurm and openmpi

[Daniel Letai]

Hi. On 12/03/2019 22:53:36, Riccardo Veraldi wrote: Hello, after trynig hard for over 10 days I am forced to write to the list. I am not able to have SLURM work with openmpi. Openmpi compiled binaries won't run on slurm, while all non openmpi progs run just fine under "srun". I am using SLURM 18.08.5 building the rpm from the tarball: rpmbuild -ta slurm-18.08.5-2.tar.bz2 prior to bulid SLURM I installed openmpi 4.0.0 which has built in pmix support. the pmix libraries are in /usr/lib64/pmix/ which is the default installation path. The problem is that hellompi is not working if I launch in from srun. of course it runs outside slurm. [psanagpu105:10995] OPAL ERROR: Not initialized in file pmix3x_client.c at line 113 -------------------------------------------------------------------------- The application appears to have been direct launched using "srun", but OMPI was not built with SLURM's PMI support and therefore cannot execute. There are several options for building PMI support under I would guess (but having the config.log files would verify it) that you should rebuild Slurm --with-pmix and then you should rebuild OpenMPI --with Slurm. Currently there might be a bug in Slurm's configure file building PMIx support without path, so you might either modify the spec before building (add --with-pmix=/usr to the configure section) or for testing purposes ./configure --with-pmix=/usr; make; make install. It seems your current configuration has built-in mismatch - Slurm only supports pmi2, while OpenMPI only supports PMIx. you should build with at least one common PMI: either external PMIx when building  Slurm, or Slurm's PMI2 when building OpenMPI. However, I would have expected the non-PMI option (srun --mpi=openmpi) to work even in your env, and Slurm should have built PMIx support automatically since it's in default search path. SLURM, depending upon the SLURM version you are using:   version 16.05 or later: you can use SLURM's PMIx support. This   requires that you configure and build SLURM --with-pmix.   Versions earlier than 16.05: you must use either SLURM's PMI-1 or   PMI-2 support. SLURM builds PMI-1 by default, or you can manually   install PMI-2. You must then build Open MPI using --with-pmi pointing   to the SLURM PMI library location. Please configure as appropriate and try again. -------------------------------------------------------------------------- *** 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) [psanagpu105:10995] Local abort before MPI_INIT completed completed successfully, but am not able to aggregate error messages, and not able to guarantee that all other processes were killed! srun: error: psanagpu105: task 0: Exited with exit code 1 I really have no clue. I even reinstalled openmpi on a specific different path /opt/openmpi/4.0.0 anyway seems like slurm does not know how to fine the MPI libraries even though they are there and right now in the default path /usr/lib64 even using --mpi=pmi2 or --mpi=openmpi does not fix the problem and the same error message is given to me. srun --mpi=list srun: MPI types are... srun: none srun: openmpi srun: pmi2 Any hint how could I fix this problem ? thanks a lot Rick -- Regards, Dani_L.