root@slurm:~# gcs update
root@slurm:~# gcs fix

Check if slurmd and munge are running, restart if not

# Check service
node# systemctl status munge
node# systemctl status slurmd
# Restart if needed
node# systemctl restart munge
node# systemctl restart slurmd

This is probably an issue with one of the power nodes. If this happens, log in to the power node and run:

service sssd restart