[slurm-users] Slurm doesn't call mpiexec or mpirun when run through a GUI app

[Reuti]

Am 21.03.2019 um 23:43 schrieb Prentice Bisbal:

> Slurm-users,
> 
> My users here have developed a GUI application which serves as a GUI interface to various physics codes they use. From this GUI, they can submit jobs to Slurm. On Tuesday, we upgraded Slurm from 18.08.5-2 to 18.08.6-2,and a user has reported a problem when submitting Slurm jobs through this GUI app that do not occur when the same sbatch script is submitted from sbatch on the command-line.
> 
> […]
> When I replaced the mpirun command with an equivalent srun command, everything works as desired, so the user can get back to work and be productive.
> 
> While srun is a suitable workaround, and is arguably the correct way to run an MPI job, I'd like to understand what is going on here. Any idea what is going wrong, or additional steps I can take to get more debug information?

Was an alias to `mpirun` introduced? It may cover the real application and even the `which mpirun` will return the correct value, but never be executed.

$ type mpirun
$ alias mpirun

may tell in the jobscript.

-- Reuti