[Bug 974374] Re: Error on unmounting a NFSv4 share

[Van Stokes, Jr.]

We just had a similar incident.
The local server autofs mounts a remote NFS. The remote server unexpectidly powered off (no normal shutdown). The remote server was powered back on however the local server was not able to access the remote NFS's. It appears the local server never umounted the remote NFS's. When you did and ls -l a bunch of question marks would appear. We attempted umount the remote mounts but the local server kept saying: {mount} was not found in /proc/mounts.

root at mysql02:/etc# df

Filesystem                1K-blocks      Used  Available Use% Mounted on
/dev/mapper/mysql02-root  716514760  11255404  668862508   2% /
udev                        6143968         4    6143964   1% /dev
tmpfs                       2461300       516    2460784   1% /run
none                           5120         0       5120   0% /run/lock
none                        6153244         0    6153244   0% /run/shm
/dev/sdg1                    233191     98407     122343  45% /boot
/dev/md0                 3845737480 590404808 3059980404  17% /d01
logilive:/opt/logisoft    816146560 176438624  597581376  23% /net/logilive/opt/logisoft
lwt1:/opt/logisoft         24520704  11627520   11646976  50% /net/lwt1/opt/logisoft

root at mysql02:/etc# umount /net/logilive/opt/logisoft

/net/logilive/opt/logisoft was not found in /proc/mounts
/net/logilive/opt/logisoft was not found in /proc/mounts

we could never get the local server to umount the remote server. We had
to reboot the local server.

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https://bugs.launchpad.net/bugs/974374

Title:
  Error on unmounting a NFSv4 share

Status in “util-linux” package in Ubuntu:
  Confirmed

Bug description:
  When unmounting an NFSv4 share I get the following error message:
  [mntent]: line <nr.> in /proc/mounts is bad

  The umount seems to succeed though.

  Package Info:
  nfs-common  1:1.2.5-3ubuntu2
  Linux 3.2.0-22-generic

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