[Bug 1687273] Re: Shared folder randomly not mounted

Thu May 18 23:55:45 UTC 2017

Another problem is that since the CIFS shared drive is mounted. It
causes the Nautilus File Explorer to crash, this slows down all my
processes on my computer, rendering my computer unable to work at all.
It needs to be restarted about every 3 hours after that. Completely
rendering us not being able to work efficiently. I have to spend
precious work time copying over the files from my shared drive to my
local computers, make sure that the files are copied correctly and
connection did not died or failed. This is not practical.

A Kernel downgrade is not a long term solution, as dowwn grading the
kernel could possibly cause something else to break (for example,
VirtualBox, which relies on the linux kernel to work properly). It also
potentially introduce vulnerability to attack. Given that downgrading
could cause more problem, it is just not safe to do for me.

As much as I like Ubuntu, using it for 10+ years now, this has failed
big time. Surely will look into other linux distro or switching over to
Mac next time I get a new computer.

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https://bugs.launchpad.net/bugs/1687273

Title:
  Shared folder randomly not mounted

Status in cifs-utils package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hello Everybody,

  since last update from ubuntu 16.04.2, last night, my servers are
  randomly not able to read and write from shared folders. I got this
  message:

  lsof: WARNING: can't stat() cifs file system /mnt/record
        Output information may be incomplete.
  lsof: WARNING: can't stat() cifs file system /mnt/record
        Output information may be incomplete.
  lsof: WARNING: can't stat() cifs file system /mnt/record
        Output information may be incomplete.
  ...
  rsync: ERROR: cannot stat destination "/mnt/record/": Host is down (112)
  rsync error: errors selecting input/output files, dirs (code 3) at main.c(652) [Receiver=3.1.1]

  This comes from my cron script.

  When I type df -h it takes sometimes very long to get the list. And it
  also can be that the mounted share is disconnected and I have to mount
  -a (what also takes long) again.

  My fstab have this command:

  //address /mnt/storage cifs
  auto,nofail,iocharset=utf8,rw,credentials=/path/.smb,uid=1000,gid=1000,file_mode=0660,dir_mode=0770
  0 0

  My update list from last night was this:

  linux-image-4.4.0-75-generic:amd64 (4.4.0-75.96, automatic)
  linux-image-extra-4.4.0-75-generic:amd64 (4.4.0-75.96, automatic)
  linux-headers-4.4.0-75-generic:amd64 (4.4.0-75.96, automatic)
  linux-headers-4.4.0-75:amd64 (4.4.0-75.96, automatic)
  Upgrade: libdns-export162:amd64 (1:9.10.3.dfsg.P4-8ubuntu1.5, 1:9.10.3.dfsg.P4-8ubuntu1.6)
  linux-headers-generic:amd64 (4.4.0.72.78, 4.4.0.75.81)
  linux-libc-dev:amd64 (4.4.0-72.93, 4.4.0-75.96)
  mysql-client-5.7:amd64 (5.7.17-0ubuntu0.16.04.2, 5.7.18-0ubuntu0.16.04.1)
  libapt-inst2.0:amd64 (1.2.19, 1.2.20)
  mysql-server-5.7:amd64 (5.7.17-0ubuntu0.16.04.2, 5.7.18-0ubuntu0.16.04.1)
  libsystemd0:amd64 (229-4ubuntu16, 229-4ubuntu17)
  linux-image-generic:amd64 (4.4.0.72.78, 4.4.0.75.81)
  apt:amd64 (1.2.19, 1.2.20)
  mysql-server:amd64 (5.7.17-0ubuntu0.16.04.2, 5.7.18-0ubuntu0.16.04.1)
  udev:amd64 (229-4ubuntu16, 229-4ubuntu17)
  libapt-pkg5.0:amd64 (1.2.19, 1.2.20)
  libudev1:amd64 (229-4ubuntu16, 229-4ubuntu17)
  cifs-utils:amd64 (2:6.4-1ubuntu1, 2:6.4-1ubuntu1.1)
  dpkg:amd64 (1.18.4ubuntu1.1, 1.18.4ubuntu1.2)
  mysql-client-core-5.7:amd64 (5.7.17-0ubuntu0.16.04.2, 5.7.18-0ubuntu0.16.04.1)
  libisc-export160:amd64 (1:9.10.3.dfsg.P4-8ubuntu1.5, 1:9.10.3.dfsg.P4-8ubuntu1.6)
  linux-virtual:amd64 (4.4.0.72.78, 4.4.0.75.81)
  systemd-sysv:amd64 (229-4ubuntu16, 229-4ubuntu17)
  distro-info-data:amd64 (0.28ubuntu0.2, 0.28ubuntu0.3)
  systemd:amd64 (229-4ubuntu16, 229-4ubuntu17)
  mysql-common:amd64 (5.7.17-0ubuntu0.16.04.2, 5.7.18-0ubuntu0.16.04.1)
  apt-utils:amd64 (1.2.19, 1.2.20)
  libmysqlclient20:amd64 (5.7.17-0ubuntu0.16.04.2, 5.7.18-0ubuntu0.16.04.1)
  linux-headers-virtual:amd64 (4.4.0.72.78, 4.4.0.75.81)
  linux-image-extra-virtual:amd64 (4.4.0.72.78, 4.4.0.75.81)
  thermald:amd64 (1.5-2ubuntu3, 1.5-2ubuntu4)
  qemu-guest-agent:amd64 (1:2.5+dfsg-5ubuntu10.10, 1:2.5+dfsg-5ubuntu10.11)
  libfreetype6:amd64 (2.6.1-0.1ubuntu2.1, 2.6.1-0.1ubuntu2.2)
  linux-image-virtual:amd64 (4.4.0.72.78, 4.4.0.75.81)
  libdpkg-perl:amd64 (1.18.4ubuntu1.1, 1.18.4ubuntu1.2)
  mysql-server-core-5.7:amd64 (5.7.17-0ubuntu0.16.04.2, 5.7.18-0ubuntu0.16.04.1)
  libxslt1.1:amd64 (1.1.28-2.1, 1.1.28-2.1ubuntu0.1)
  dpkg-dev:amd64 (1.18.4ubuntu1.1, 1.18.4ubuntu1.2)

  I saw that somebody else has the same problem:

  https://askubuntu.com/questions/910058/updates-broke-cifs-smb-mounts-
  in-16-04

  I had to remove the latest kernel update, after that it works.

  Regards

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