It looks like there was a failure to communicate with your mirror of the Ubuntu archive.
2015-11-17 07:55:32,689 DEBUG running doUpdate() (showErrors=False) 2015-11-17 07:56:28,071 ERROR IOError/SystemError in cache.update(): 'W:Failed to fetch http://mirror01.idc.hinet.net/ubuntu/dists/utopic/restricted/binary-amd64/Packages Unable to connect to mirror01.idc.hinet.net:http: , W:Failed to fetch http://mirror01.idc.hinet.net/ubuntu/dists/utopic/universe/binary-amd64/Packages Unable to connect to mirror01.idc.hinet.net:http: , W:Failed to fetch http://mirror01.idc.hinet.net/ubuntu/dists/utopic/multiverse/binary-amd64/Packages Unable to connect to mirror01.idc.hinet.net:http: That mirror of Ubuntu seems to be available so it is likely an issue with the network which you were on when you were trying to upgrade Ubuntu. I recommend investigating your connectivity to that mirror, or switching mirrors. ** 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/1516853 Title: ubuntu release upgrade crashed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1516853/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
