can't upgrade linux to disco dingo

[Sonal Kawle]

Cannot upgrade to linux disco dingo version

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.34
ProcVersionSignature: Ubuntu 5.0.0-31.33~18.04.1-generic 5.0.21
Uname: Linux 5.0.0-31-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
CrashDB: ubuntu
Date: Sun Oct 20 10:06:28 2019
InstallationDate: Installed on 2019-10-13 (6 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2019-10-20 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2019-10-20 10:00:50.815780
 Log time: 2019-10-20 10:04:20.814363
 Log time: 2019-10-20 10:06:09.892516
 Log time: 2019-10-20 10:06:31.777103
VarLogDistupgradeTermlog:

mtime.conffile..etc.update-manager.release-upgrades: 2019-10-20T09:35:35.729441

[Brian Murray (brian-murray)]

There was a timeout when connecting to the mirror of the Ubuntu archive which you use. Please try the upgrade again.

2019-10-20 10:04:43,435 DEBUG examining: 'deb http://in.archive.ubuntu.com/ubuntu/ bionic main restricted'
2019-10-20 10:04:43,435 DEBUG verifySourcesListEntry: deb http://in.archive.ubuntu.com/ubuntu/ disco main restricted
2019-10-20 10:04:43,435 DEBUG url_downloadable: http://in.archive.ubuntu.com/ubuntu//dists/disco/Release
2019-10-20 10:04:43,435 DEBUG s='http' n='in.archive.ubuntu.com' p='/ubuntu//dists/disco/Release' q='' f=''
2019-10-20 10:04:58,723 DEBUG error from httplib: 'HTTP Error 502: Connection timed out'

[Launchpad Janitor (janitor)]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no activity for 60 days.]