mirror over use during version upgrade

[Steve Wright]

over use of mirror error, distribution upgrade aborted

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.19.0-65.73~14.04.1-generic 3.19.8-ckt22
Uname: Linux 3.19.0-65-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CrashDB: ubuntu
Date: Mon Aug 8 16:04:53 2016
InstallationDate: Installed on 2015-08-20 (353 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-08-08 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2016-08-08 15:59:25.608757
 Log time: 2016-08-08 16:00:28.886745
 Log time: 2016-08-08 16:02:40.764301
 Log time: 2016-08-08 16:04:59.906288
VarLogDistupgradeTermlog: