[Bug 1892028] [NEW] Impossible to upgrade to 20.04 lts from 18.04

[QUINTON Eric]

Public bug reported:

Probably error in cache:
2020-08-18 13:59:05,049 DEBUG running doUpdate() (showErrors=False)
2020-08-18 13:59:15,107 ERROR IOError/SystemError in cache.update(): ''. Retrying (currentRetry: 0)
2020-08-18 13:59:15,108 ERROR doUpdate() failed completely
2020-08-18 13:59:15,108 DEBUG openCache()

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 4.15.0-112.113-generic 4.15.18
Uname: Linux 4.15.0-112-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.16
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: GNOME
Date: Tue Aug 18 14:15:46 2020
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-11-27 (629 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-08-18 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2020-08-18T09:56:03.859601

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic dist-upgrade third-party-packages

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https://bugs.launchpad.net/bugs/1892028

Title:
  Impossible to upgrade to 20.04 lts from 18.04

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

Bug description:
  Probably error in cache:
  2020-08-18 13:59:05,049 DEBUG running doUpdate() (showErrors=False)
  2020-08-18 13:59:15,107 ERROR IOError/SystemError in cache.update(): ''. Retrying (currentRetry: 0)
  2020-08-18 13:59:15,108 ERROR doUpdate() failed completely
  2020-08-18 13:59:15,108 DEBUG openCache()

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-112.113-generic 4.15.18
  Uname: Linux 4.15.0-112-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.16
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: GNOME
  Date: Tue Aug 18 14:15:46 2020
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-xenial-amd64-20160624-2
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2018-11-27 (629 days ago)
  InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-08-18 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2020-08-18T09:56:03.859601

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