[Bug 1625667] Re: Trusty: apt does not try next mirror if index file download fails with mirror:// source

[Julian Andres Klode]

"Marking dev + xenial as Invalid since it works from Xenial onward"

You marked trusty and dev as invalid, and kept xenial open?
Unfortunately, there have been huge changes in the acquire system in
1.1, so there is likely no way to fix this in trusty.

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Title:
  Trusty: apt does not try next mirror if index file download fails with
  mirror:// source

Status in apt package in Ubuntu:
  Invalid
Status in apt source package in Trusty:
  Invalid
Status in apt source package in Xenial:
  In Progress

Bug description:
  When using the mirror://mirrors.ubuntu.com/mirrors.txt  functionality
  on Trusty, if the download of the index file fails, apt will not retry
  on another archive listed in mirrors.txt and will fail.

  Running the following on Trusty leads to the following result :

  sudo apt-get update -qq 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-security/universe/binary-amd64/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-security/main/binary-i386/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-security/restricted/binary-i386/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-security/universe/binary-i386/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-updates/main/binary-amd64/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-updates/restricted/binary-amd64/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-updates/universe/binary-amd64/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-updates/main/binary-i386/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-updates/restricted/binary-i386/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  W: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/trusty-updates/universe/binary-i386/Packages 404 Not Found [Mirror: http://ftp.availo.se/ubuntu/] 
  E: Some index files failed to download. They have been ignored, or old ones used instead. 

  The same configuration works correctly on Xenial

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