[Bug 1792978] Re: initscript avahi-daemon, action "start" failed

[Jason Hobbs]

Subscribed to field-high as this is causing a lot of failures lately.

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https://bugs.launchpad.net/bugs/1792978

Title:
  initscript avahi-daemon, action "start" failed

Status in avahi package in Ubuntu:
  New

Bug description:
  When installing maas-region-controller, avahi-deamon failed to install
  because it was it seemed to already be running.

  
  $ apt-get -q install -y maas-region-controller
  ....
  [1invoke-rc.d: initscript avahi-daemon, action "start" failed.
  ● avahi-daemon.service - Avahi mDNS/DNS-SD Stack
     Loaded: loaded (/lib/systemd/system/avahi-daemon.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Sat 2018-09-15 19:42:29 UTC; 9ms ago
     Process: 22726 ExecStart=/usr/sbin/avahi-daemon -s (code=exited, status=255)
   Main PID: 22726 (code=exited, status=255)
   
  Sep 15 19:42:29 leafeon systemd[1]: Starting Avahi mDNS/DNS-SD Stack...
  Sep 15 19:42:29 leafeon avahi-daemon[22726]: Daemon already running on PID 21868
  Sep 15 19:42:29 leafeon systemd[1]: avahi-daemon.service: Main process exit.../a
  Sep 15 19:42:29 leafeon systemd[1]: Failed to start Avahi mDNS/DNS-SD Stack.
  Sep 15 19:42:29 leafeon systemd[1]: avahi-daemon.service: Unit entered fail...e.
  Sep 15 19:42:29 leafeon systemd[1]: avahi-daemon.service: Failed with resul...'.
  Hint: Some lines were ellipsized, use -l to show in full.
  dpkg: error processing package avahi-daemon (--configure):
   subprocess installed post-installation script returned error exit status 1
  dpkg: dependency problems prevent configuration of avahi-utils:
   avahi-utils depends on avahi-daemon; however:
    Package avahi-daemon is not configured yet.

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