[Bug 1717280] [NEW] systemctl stop unattended-upgrades.service hangs during upgrade

[hackel]

Public bug reported:

This morning unattended-upgrades tried to upgrade itself from
0.93.1ubuntu2.2 to 0.93.1ubuntu2.3. It seems like the prerm script tried
to run "systemctl stop unattended-upgrades.service" which simply hung.
I repeated the command manually and it hung for me as well.  During this
time, dpkg was holding a lock and I could not install/upgrade any other
packages.  Eventually, after around 10 minutes, it must have timed out
or something and the process finally ended.

It did detect the crash and uploaded the crash report to whatever
magical place those go...

** Affects: unattended-upgrades (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1717280

Title:
  systemctl stop unattended-upgrades.service hangs during upgrade

Status in unattended-upgrades package in Ubuntu:
  New

Bug description:
  This morning unattended-upgrades tried to upgrade itself from
  0.93.1ubuntu2.2 to 0.93.1ubuntu2.3. It seems like the prerm script
  tried to run "systemctl stop unattended-upgrades.service" which simply
  hung.  I repeated the command manually and it hung for me as well.
  During this time, dpkg was holding a lock and I could not
  install/upgrade any other packages.  Eventually, after around 10
  minutes, it must have timed out or something and the process finally
  ended.

  It did detect the crash and uploaded the crash report to whatever
  magical place those go...

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