[Bug 1825944] Re: crash on do-release-upgrade

[Brian Murray]

Something is wrong with the name resolution service the system which you
are trying to upgrade is using. From VarLogDistupgradeMainlog.txt we can
see:

2019-04-23 00:26:37,923 DEBUG examining: 'deb http://us.archive.ubuntu.com/ubuntu/ bionic main restricted'
2019-04-23 00:26:37,923 DEBUG verifySourcesListEntry: deb http://us.archive.ubuntu.com/ubuntu/ cosmic main restricted
2019-04-23 00:26:37,923 DEBUG url_downloadable: http://us.archive.ubuntu.com/ubuntu//dists/cosmic/Release
2019-04-23 00:26:37,924 DEBUG s='http' n='us.archive.ubuntu.com' p='/ubuntu//dists/cosmic/Release' q='' f=''
2019-04-23 00:27:07,953 DEBUG error from httplib: '<urlopen error [Errno -2] Name or service not known>'
2019-04-23 00:27:07,953 DEBUG entry '# deb http://us.archive.ubuntu.com/ubuntu/ bionic main restricted' was disabled (no Release file)

If you fix the issue resolving us.archive.ubuntu.com then you should be
able to upgrade.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

** Summary changed:

- crash on do-release-upgrade
+ release upgrade quits because archive mirror is not resolvable

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https://bugs.launchpad.net/bugs/1825944

Title:
  release upgrade quits because archive mirror is not resolvable

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

Bug description:
  https://pastebin.com/UAXV4TQ9

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.31
  ProcVersionSignature: Ubuntu 4.15.0-47.50-generic 4.15.18
  Uname: Linux 4.15.0-47-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
  CrashDB: ubuntu
  Date: Tue Apr 23 00:27:54 2019
  InstallationDate: Installed on 2019-03-30 (23 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2019-04-23 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2019-04-23 00:26:23.325725
   Log time: 2019-04-23 00:26:26.332058
   Log time: 2019-04-23 00:27:53.952763
   Log time: 2019-04-23 00:27:56.724225
  mtime.conffile..etc.update-manager.release-upgrades: 2019-04-23T00:24:11.618741

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