Missing shared library of some mvapich2 modules

Updates on Feb 25 2022:

This issue is fixed. 

Original Post:

Users may see an issue of missing shared library with some mvapich2 modules on Pitzer and Owens. The error is like

<path_to_executable>: error while loading shared libraries: libim_client.so.0: cannot open shared object file: No such file or directory

We are in the process of rebuilding mvapich2 versions that are affected. 

Rolling reboots of Owens cluster, starting from Feb 18, 2021

Updated on March 2:

This is completed.

Original Post:

We will have rolling reboots of Owens cluster including login and compute nodes, starting from 9AM Feb 18, 2021. The rolling reboot is to update BIOS for urgent security updates. The rolling reboots won't affect any running jobs, but users may experience longer queue wait time than usual on the cluster. User will also expect a ~10 minute outage of login nodes during the reboot of login nodes.

OpenMPI job stopped at 'There are not enough slots available in the system to satisfy the slots'

Users would encounter a MPI job failed with openmpi/3.1.0-hpcx on Owens and Pitzer. The job would stop with the error  like "There are not enough slots available in the system to satisfy the slots". Please switch to openmpi/3.1.4-hpcx. The buggy version openmpi/3.1.0-hpcx will be removed on August 18 2020.


Resolved: We removed  openmpi/3.1.0-hpcx on August 18 2020.