[Bug 1573919] Re: do-release-upgrade 15.10 -> 16.04 failed due to squid3 and unity

[Brian Murray]

It actually looks like it may be an issue with dpkg:

Removing obsolete conffile /etc/squid3/msntauth.conf ...
initctl: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused
insserv: warning: script 'screen-cleanup' missing LSB tags and overrides
insserv: Default-Start undefined, assuming empty start runlevel(s) for script `screen-cleanup'
insserv: Default-Stop  undefined, assuming empty stop  runlevel(s) for script `screen-cleanup'
Skipping profile in /etc/apparmor.d/disable: usr.sbin.squid
Removing obsolete conffile /etc/init.d/squid3 ...
Removing obsolete conffile /etc/init/squid3.conf ...
Processing triggers for systemd (229-4ubuntu4) ...
dpkg: dependency problems prevent processing triggers for ufw:
 ufw depends on ucf; however:
  Package ucf is not configured yet.
 ufw depends on python3; however:
  Package python3 is not configured yet.
 ufw depends on python3:any (>= 3.3.2-2~); however:
  Package python3 is not configured yet.

dpkg: error processing archive /var/cache/apt/archives/squid3_3.5.12-1ubuntu7_all.deb (--unpack):
 dependency problems - leaving triggers unprocessed

** Changed in: ubuntu-release-upgrader (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1573919

Title:
  do-release-upgrade 15.10 -> 16.04 failed due to squid3 and unity

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  I've a laptop running Ubuntu GNOME that also acts as my home server.
  It's always on, runs things like a local squid-deb-proxy, and it's
  connected to my TV for entertainment (hence GNOME).

  I was trying to upgrade it from 15.10 to 16.04 with do-release-upgrade
  over ssh, and it failed in the middle:

      Errors were encountered while processing:                                                                                                       
       squid3                                                                                                                                         
       unity                                                                                                                                          
                                                                                                                                                      
      Upgrade complete                                                                                                                                
                                                                                                                                                      
      The upgrade has completed but there were errors during the upgrade                                                                              
      process.                                                                                                                                        

  I'm now recovering with 'apt dist-upgrade -f --auto-remove', and I
  hope that ubuntu-bug attached the relevant log files from /var/log
  /dist-upgrade/ to make this bug report useful.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.12
  ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
  Uname: Linux 4.2.0-35-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sat Apr 23 10:41:59 2016
  InstallationDate: Installed on 2012-11-02 (1267 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  PackageArchitecture: all
  ProcEnviron:
   LC_CTYPE=lt_LT.UTF-8
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2016-04-23 (0 days ago)

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