Public bug reported:
Afer haveing upgraded to Ubuntu 13.10 (3.11.0-15-generic) I an unable to
unmount nfsv3.
Setting: My NAS is only running a few hours per day. I have a script
mounting the NAS share when the NAS becomes available on the network.
The script also tries to unmount the shares when the NAS shut downs.
This configuration was running without any problems under Ubuntu 12.10.
After upgrading to 13.10 the unmounting is not working anymore and the
computer is even not shuting down completely. I used to mount "hard"
without any problems now I tried "soft" but no success. Unmounting works
perfect as long as NAS is accessible.
georg@InaUbuntu:~$ mount
...
192.168.1.10:/media on /mnt/NAS/media type nfs
(rw,soft,intr,tcp,actimeo=3,addr=192.168.1.10)
192.168.1.10:/backup on /mnt/NAS/backup type nfs
(rw,soft,intr,tcp,actimeo=3,addr=192.168.1.10)
== NAS is turned off ===
georg@InaUbuntu:~$ lsof /mnt/NAS/backup
"stalled"
georg@InaUbuntu:~$ fuser -v /mnt/NAS/backup
"stalled"
georg@InaUbuntu:~$ sudo umount -l /mnt/NAS/backup
[sudo] password for georg:
"stalled"
georg@InaUbuntu:~$ sudo umount -f /mnt/NAS/backup
"stalled"
georg@InaUbuntu:~$ sudo umount -l -f /mnt/NAS/backup
"stalled"
/Var/syslog & dmesg remains "clean", no nfs related messages
georg@InaUbuntu:~$ nfsstat -m
/mnt/NAS/backup from 192.168.1.10:/backup
Flags:
rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,acregmax=3,acdirmin=3,acdirmax=3,soft,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.1.10,mountvers=3,mountport=3244,mountproto=tcp,local_lock=none,addr=192.168.1.10
/mnt/NAS/media from 192.168.1.10:/media
Flags:
rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,acregmax=3,acdirmin=3,acdirmax=3,soft,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.1.10,mountvers=3,mountport=3244,mountproto=tcp,local_lock=none,addr=192.168.1.10
Any comments & help are highly appreciated. I cannot use nfs4 as it is not
supported by NAS.
Best regards,
Georg
** Affects: nfs-utils (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1274678
Title:
Unable to unmount nfsv3 when server is inaccessible
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