Hello, 
We recently installed slurm-25 on Redhat linux. 
We failed to start the slurmctld service. 
sudo systemctl start slurmctld
Job for slurmctld.service failed because the control process exited with error code.
See "systemctl status slurmctld.service" and "journalctl -xeu slurmctld.service" for details.

sudo systemctl status slurmctld
× slurmctld.service - Slurm controller daemon
     Loaded: loaded (/usr/local/lib/systemd/system/slurmctld.service; enabled; preset: disabled)
     Active: failed (Result: exit-code) since Thu 2025-07-31 22:23:18 EDT; 1min 3s ago
    Process: 44317 ExecStart=/usr/local/sbin/slurmctld --systemd $SLURMCTLD_OPTIONS (code=exited, status=1/FAILURE)
   Main PID: 44317 (code=exited, status=1/FAILURE)
        CPU: 35ms

Jul 31 22:22:29 fgcu-compute01 systemd[1]: Starting Slurm controller daemon...
Jul 31 22:23:18 fgcu-compute01 slurmctld[44317]: [2025-07-31T22:23:18.679] error: If munged is up, restart with --num-threads=10
Jul 31 22:23:18 fgcu-compute01 slurmctld[44317]: [2025-07-31T22:23:18.679] error: Munge encode failed: Failed to connect to "/run/munge/mung>
Jul 31 22:23:18 fgcu-compute01 slurmctld[44317]: [2025-07-31T22:23:18.679] error: Failed to create MUNGE Credential
Jul 31 22:23:18 fgcu-compute01 slurmctld[44317]: [2025-07-31T22:23:18.679] error: Couldn't load specified plugin name for auth/munge: Plugin>
Jul 31 22:23:18 fgcu-compute01 slurmctld[44317]: [2025-07-31T22:23:18.679] error: cannot create auth context for auth/munge
Jul 31 22:23:18 fgcu-compute01 slurmctld[44317]: [2025-07-31T22:23:18.679] fatal: failed to initialize auth plugin
Jul 31 22:23:18 fgcu-compute01 systemd[1]: slurmctld.service: Main process exited, code=exited, status=1/FAILURE
Jul 31 22:23:18 fgcu-compute01 systemd[1]: slurmctld.service: Failed with result 'exit-code'.
Jul 31 22:23:18 fgcu-compute01 systemd[1]: Failed to start Slurm controller daemon.

Here is munge service status.
munge.service - MUNGE authentication service
     Loaded: loaded (/usr/local/lib/systemd/system/munge.service; enabled; preset: disabled)
     Active: active (running) since Thu 2025-07-31 22:06:14 EDT; 19min ago
       Docs: man:munged(8)
   Main PID: 44039 (munged)
      Tasks: 4 (limit: 606218)
     Memory: 1.4M
        CPU: 18ms
     CGroup: /system.slice/munge.service
             └─44039 /usr/local/sbin/munged

Jul 31 22:06:14 fgcu-compute01 systemd[1]: Starting MUNGE authentication service...
Jul 31 22:06:14 fgcu-compute01 systemd[1]: Started MUNGE authentication service.

Any suggestion is apprecieted to resolve this issue. 

Thanks,


Nilesh Dhumal  

Associate Professor of Chemistry,

 http://faculty.fgcu.edu/ndhumal/

Coordinator, FGCU Computational Facility, 

https://www.fgcu.edu/cas/facultyresources/computationalfacility/
SH-430; Department of Chemistry and Physics
Florida Gulf Coast University
10501 FGCU Boulevard South
Fort Myers, FL 33965-6565
Phone: (239) 745-4394
Email: ndhumal@fgcu.edu