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MvL

[6.8.3] Server refused to reboot / services became unresponsive

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Hi,

 

I had some problems yesterday with my unRAID server. I think it started when mounting a NFS share via unassigned devices for some reason it failed.

 

Quote

Mar 27 21:10:47 Tower unassigned.devices: Mount NFS command: /sbin/mount -t nfs -o rw,hard,timeo=600,retrans=10 '192.168.100.20:/volume1/downloads' '/mnt/disks/192.168.100.20_downloads'
Mar 27 21:10:47 Tower rpcbind[25869]: connect from 127.0.0.1 to getport/addr(status)
Mar 27 21:10:47 Tower unassigned.devices: NFS mount failed: mount.nfs: access denied by server while mounting 192.168.100.20:/volume1/downloads .
Mar 27 21:10:47 Tower unassigned.devices: Mount of '192.168.100.20:/volume1/downloads' failed. Error message: 'mount.nfs: access denied by server while mounting 192.168.100.20:/volume1/downloads '.
Mar 27 21:11:14 Tower unassigned.devices: Mount NFS command: /sbin/mount -t nfs -o rw,hard,timeo=600,retrans=10 '192.168.100.20:/volume1/downloads' '/mnt/disks/192.168.100.20_downloads'
Mar 27 21:11:14 Tower rpcbind[26320]: connect from 127.0.0.1 to getport/addr(status)
Mar 27 21:12:08 Tower unassigned.devices: Mount NFS command: /sbin/mount -t nfs -o rw,hard,timeo=600,retrans=10 '192.168.100.20:/volume1/downloads' '/mnt/disks/192.168.100.20_downloads'
Mar 27 21:12:08 Tower rpcbind[27009]: connect from 127.0.0.1 to getport/addr(status)
Mar 27 21:12:53 Tower unassigned.devices: Mount NFS command: /sbin/mount -t nfs -o rw,hard,timeo=600,retrans=10 '192.168.100.20:/volume1/downloads' '/mnt/disks/192.168.100.20_downloads'
Mar 27 21:12:53 Tower rpcbind[27602]: connect from 127.0.0.1 to getport/addr(status)
Mar 27 21:13:05 Tower unassigned.devices: Removing configuration '192.168.100.20:/volume1/downloads'.
Mar 27 21:16:00 Tower sshd[26889]: Received disconnect from 192.168.100.103 port 49414:11: disconnected by user
Mar 27 21:16:00 Tower sshd[26889]: Disconnected from user root 192.168.100.103 port 49414
Mar 27 21:16:00 Tower sshd[26889]: syslogin_perform_logout: logout() returned an error
Mar 27 21:16:14 Tower sshd[29323]: Accepted password for root from 192.168.100.103 port 49931 ssh2
Mar 27 21:26:08 Tower sshd[29323]: Received disconnect from 192.168.100.103 port 49931:11: disconnected by user
Mar 27 21:26:08 Tower sshd[29323]: Disconnected from user root 192.168.100.103 port 49931
Mar 27 21:26:27 Tower kernel: mdcmd (121): nocheck cancel

 

Then I decided to restart the server because some services became unresponsive.  Then the whole server became unresponsive and doesn't want to reboot.

 

Quote

Mar 27 21:49:48 Tower root: /mnt/cache:          root     kernel mount /mnt/cache
Mar 27 21:49:48 Tower root: /mnt/disk1:          root     kernel mount /mnt/disk1
Mar 27 21:49:48 Tower root: /mnt/disk2:          root     kernel mount /mnt/disk2
Mar 27 21:49:48 Tower root: /mnt/disk21:         root     kernel mount /mnt/disk21
Mar 27 21:49:48 Tower root: /mnt/disk22:         root     kernel mount /mnt/disk22
Mar 27 21:49:48 Tower root: /mnt/disk4:          root     kernel mount /mnt/disk4
Mar 27 21:49:48 Tower root: /mnt/disk5:          root     kernel mount /mnt/disk5
Mar 27 21:49:48 Tower root: /mnt/disk6:          root     kernel mount /mnt/disk6
Mar 27 21:49:48 Tower root: /mnt/disk7:          root     kernel mount /mnt/disk7
Mar 27 21:49:48 Tower root: /mnt/disk8:          root     kernel mount /mnt/disk8
Mar 27 21:49:48 Tower root: /mnt/disk9:          root     kernel mount /mnt/disk9
Mar 27 21:49:48 Tower root: /mnt/disks:          root     kernel mount /mnt/disks
Mar 27 21:49:48 Tower root: /mnt/user:           root     kernel mount /mnt/user
Mar 27 21:49:48 Tower root: /mnt/user0:          root     kernel mount /mnt/user0
Mar 27 21:49:48 Tower root: Active pids left on /dev/md*
Mar 27 21:49:48 Tower root:                      USER        PID ACCESS COMMAND
Mar 27 21:49:48 Tower root: /dev/md1:            root     kernel mount /mnt/disk1
Mar 27 21:49:48 Tower root: /dev/md2:            root     kernel mount /mnt/disk2
Mar 27 21:49:48 Tower root: /dev/md21:           root     kernel mount /mnt/disk21
Mar 27 21:49:48 Tower root: /dev/md22:           root     kernel mount /mnt/disk22
Mar 27 21:49:48 Tower root: /dev/md4:            root     kernel mount /mnt/disk4
Mar 27 21:49:48 Tower root: /dev/md5:            root     kernel mount /mnt/disk5
Mar 27 21:49:48 Tower root: /dev/md6:            root     kernel mount /mnt/disk6
Mar 27 21:49:48 Tower root: /dev/md7:            root     kernel mount /mnt/disk7
Mar 27 21:49:48 Tower root: /dev/md8:            root     kernel mount /mnt/disk8
Mar 27 21:49:48 Tower root: /dev/md9:            root     kernel mount /mnt/disk9
Mar 27 21:49:48 Tower root: Generating diagnostics...

 

I think the "Mar 27 21:49:48 Tower root: Active pids left on /dev/md*" was the reason why the server didn't want to reboot, but I like some assistance from some more experienced person! I like to prevent this in the future.

 

I also attached the diagnostic file.

 

 

 

 

tower-diagnostics-20200327-2149.zip

Edited by MvL

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I'm not sure but maybe I posted this in the wrong forum. Maybe this must be moved to bug reports. Please move if needed!? 

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This is the correct forum, if typing "reboot" didn't work you'd need to manually stop whatever is using the disks and then unmount them or force a reboot.

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Johnnie thanks for your reply.

 

After some searching on the forums I found these useful commands! "lsof" and "kill". I think they are very useful to look for open files and kill them.

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