Instability on Clusters after May 13 Downtime

We've been experiencing some instability on the clusters (particularly Cardinal and Ascend). 

Cannot use mpiexec/mpirun from OpenMPI in an interactive session

Category: 
Owens
Pitzer
Software
Resolution: 
Resolved
Workaround Link: 
Workaround Link
Affected Software: 
OpenMPI

We found mpiexec/mpirun from OpenMPI can not be used in an interactive session (launched by sinteractive) after upgrading Pitzer and Owens to Slurm 20.11.4. Please use srun only while you use OpenMPI in an interactive session.