[Bug 1828990] Re: distro update failed, no valid mirrors available.

[Brian Murray]

It looks like there was an issue communicating with the mirror of the
Ubuntu archive which you use. You'll need to sort this out yourself or
switch mirrors. From VarLogDistupgradeMainlog.txt:

 32 2019-05-14 17:56:19,426 DEBUG Checking pkg: ubuntu-standard
 33 2019-05-14 17:56:19,429 DEBUG examining: 'deb-src http://ftp.sjtu.edu.cn/ubuntu/ cosmic main restricted #Added by software-properties'
 34 2019-05-14 17:56:19,429 DEBUG verifySourcesListEntry: deb-src http://ftp.sjtu.edu.cn/ubuntu/ disco main restricted #Added by software-prop    erties
 35 2019-05-14 17:56:19,429 DEBUG url_downloadable: http://ftp.sjtu.edu.cn/ubuntu//dists/disco/Release
 36 2019-05-14 17:56:19,429 DEBUG s='http' n='ftp.sjtu.edu.cn' p='/ubuntu//dists/disco/Release' q='' f=''
 37 2019-05-14 17:56:24,501 DEBUG error from httplib: 'Remote end closed connection without response'


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

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https://bugs.launchpad.net/bugs/1828990

Title:
  distro update failed, no valid mirrors available.

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

Bug description:
  updatin from software updater distro from cosmic to dico dingo

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: ubuntu-release-upgrader-core 1:18.10.11.6
  ProcVersionSignature: Ubuntu 4.18.0-18.19-generic 4.18.20
  Uname: Linux 4.18.0-18-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.10-0ubuntu13.3
  Architecture: amd64
  CrashDB: ubuntu
  Date: Tue May 14 18:00:10 2019
  InstallationDate: Installed on 2019-03-04 (71 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to cosmic on 2019-05-14 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2019-05-14 17:55:45.909214
   Log time: 2019-05-14 17:55:55.221711
   Log time: 2019-05-14 17:59:51.641874
   Log time: 2019-05-14 18:00:12.287864
  VarLogDistupgradeTermlog:

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