This seems to be a network issue as the system being upgraded was unable to communicate with the mirror of Ubuntu which you are using.
2015-11-21 12:51:54,205 DEBUG running doUpdate() (showErrors=True) 2015-11-21 12:55:43,531 ERROR IOError/SystemError in cache.update(): 'W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/wily/universe/source/Sources Cannot initiate the connection to us.archive.ubuntu.com:80 (91.189.91.15). - connect (101: Network is unreachable) [IP: 91.189.91.15 80] , W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/wily/multiverse/source/Sources Cannot initiate the connection to us.archive.ubuntu.com:80 (91.189.91.15). - connect (101: Network is unreachable) [IP: 91.189.91.15 80] , W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/wily/main/binary-amd64/Packages Cannot initiate the connection to us.archive.ubuntu.com:80 (91.189.91.15). - connect (101: Network is unreachable) [IP: 91.189.91.15 80] ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1518600 Title: Upgrade crash from 15.04 to15.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1518600/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
