RHEL6: unable to stop or restart nfs service, even killing nfs server threads does not work

Solution Unverified - Updated -

Issue

  • We're unable to restart nfs service on one of the servers. Looks like the process is getting to a dead lock state.
  • Is there a better method to bring the nfs service back w/o server reboot?
  • I've tried to kill (kill -9) the nfsd processes (pid 3162 3161 3160 3159 3158 3157 3156 3155) but still no luck.
  • Example
[root@servername ~]# /etc/init.d/nfs status
rpc.svcgssd is stopped
rpc.mountd (pid 28093) is running...
nfsd (pid 3162 3161 3160 3159 3158 3157 3156 3155) is running...
rpc.rquotad (pid 28089) is running...
[root@servername ~]# kill -9 3162
[root@servername ~]# /etc/init.d/nfs stop
Shutting down NFS daemon:                                  [  OK  ]
Shutting down NFS mountd:                                  [  OK  ]
Shutting down NFS quotas:                                  [  OK  ]
Shutting down NFS services:                                [  OK  ]
[root@servername ~]# /etc/init.d/nfs status
rpc.svcgssd is stopped
rpc.mountd is stopped
nfsd (pid 3162 3161 3160 3159 3158 3157 3156 3155) is running...
rpc.rquotad is stopped
[root@servername ~]# /etc/init.d/nfs restart
Shutting down NFS daemon:                                  [  OK  ]
Shutting down NFS mountd:                                  [FAILED]
Shutting down NFS quotas:                                  [FAILED]
Starting NFS services:                                     [  OK  ]
Starting NFS quotas:                                       [  OK  ]
Starting NFS mountd:                                       [  OK  ]
Stopping RPC idmapd:                                       [  OK  ]
Starting RPC idmapd:                                       [  OK  ]
Starting NFS daemon:                                       [  OK  ]
[root@servername ~]# /etc/init.d/nfs status
rpc.svcgssd is stopped
rpc.mountd (pid 28323) is running...
nfsd (pid 3162 3161 3160 3159 3158 3157 3156 3155) is running...
rpc.rquotad (pid 28319) is running...

Environment

  • Red Hat Enterprise Linux 6
  • NFS server

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