[Bug 1956000] Re: Not able to upgrade from 20.04 to 21.05

[Brian Murray]

Reviewing the log file, /var/log/dist-upgrade/main.log, from your
upgrade attempt there was a failure to communicate with the mirror of
the Ubuntu archive which you use. This could either be due to an issue
with your connection to the mirror or with the mirror itself.
Regardless, this is an issue you'll need to sort out by fixing your
network connection or switching to a different mirror of the Ubuntu
archive before the upgrade can complete. If after resolving the
communication error with the mirror you are still unable to upgrade to a
new release of Ubuntu please open a new bug report so we'll have fresh
log files. Thanks and good luck!

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

** Tags added: connection-refused

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https://bugs.launchpad.net/bugs/1956000

Title:
  Not able to upgrade from 20.04 to 21.05

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

Bug description:
  Not able to upgrade from 20.04 to 21.05

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.36
  ProcVersionSignature: Ubuntu 5.4.0-91.102-generic 5.4.151
  Uname: Linux 5.4.0-91-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.21
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  Date: Thu Dec 30 00:36:56 2021
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-xenial-amd64-20160624-2
  InstallationDate: Installed on 2017-08-08 (1604 days ago)
  InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2021-12-29 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2021-12-30 00:34:13.242403
   Log time: 2021-12-30 00:35:19.927164
   Log time: 2021-12-30 00:36:44.460905
   Log time: 2021-12-30 00:36:55.509109
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2021-02-12T22:56:28.044001

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