cman gets stucked on unmounting configfs

well, once again i got stuck when my cluster suddenly doesn't work and i need to figure out why without restarting my server. restarting cman always throw me a stuck "Unmounting configfs..."

/etc/init.d/cman restart
Stopping cluster:
   Stopping dlm_controld... [  OK  ]
   Stopping fenced... [  OK  ]
   Stopping cman... [  OK  ]
   Unloading kernel modules... [  OK  ]
   Unmounting configfs...

running service cman status i get the following

service cman status
Found stale pid file

now i tried to stop all services that may caused this but apparently it was because the cluster is still running, hence, it wasn't able to unmount configfs

/etc/init.d/pve-cluster stop

once i've stopped my pve cluster. i tried restarting cman again

/etc/init.d/cman restart
Stopping cluster:
   Stopping dlm_controld... [  OK  ]
   Stopping fenced... [  OK  ]
   Stopping cman... [  OK  ]
   Unloading kernel modules... [  OK  ]
   Unmounting configfs... [  OK  ]
Starting cluster:
   Checking if cluster has been disabled at boot... [  OK  ]
   Checking Network Manager... [  OK  ]
   Global setup... [  OK  ]
   Loading kernel modules... [  OK  ]
   Mounting configfs... [  OK  ]
   Starting cman... [  OK  ]
   Waiting for quorum... [  OK  ]
   Starting fenced... [  OK  ]
   Starting dlm_controld... [  OK  ]
   Tuning DLM kernel config... [  OK  ]
   Unfencing self... [  OK  ]

now my cman starts running again i can start my cluster again

/etc/init.d/pve-cluster restart
Restarting pve cluster filesystem: pve-cluster.

just to make sure everything works, you can run the following

service cman status
cluster is running.

now i don't have to restart my server in order to get my cluster running again. Hope this helps!

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