[Bug 1308200] Re: apt-get not RFC6555 (Happy Eyeballs) compliant

[Julian Andres Klode]

** Changed in: apt (Ubuntu)
   Importance: Undecided => Low

** Changed in: apt (Ubuntu)
   Importance: Low => Medium

** Changed in: apt (Ubuntu)
       Status: Confirmed => In Progress

** Changed in: apt (Ubuntu)
     Assignee: (unassigned) => Julian Andres Klode (juliank)

** Bug watch added: Debian Bug tracker #668948
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=668948

** Also affects: apt (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=668948
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1308200

Title:
  apt-get not RFC6555 (Happy Eyeballs) compliant

Status in apt package in Ubuntu:
  In Progress
Status in apt package in Debian:
  Unknown

Bug description:
  Disclaimer: I'm not sure if this is a bug, or a feature. If it is not
  a bug, I think reporting this issue is useful anyway because it causes
  long delays in apt-get install / apt-get update.

  On dual-stack setups (IPv4 and IPv6), if one of the two paths is slow
  or non-functional at all, the overall application experience can be
  slow.

  An application that uses a Happy Eyeballs (RFC 6555) algorithm checks
  both IPv4 and IPv6 connectivity (with a preference for IPv6) and uses
  the first connection that is returned. This has been implemented in,
  for example, Chrome and Firefox.

  apt / apt-get does not have this functionality. Due to this lack, a
  apt-get run can be very slow: a "sudo apt-get update" can take up to
  15 minutes on a system with a non-functional IPv6 connection, even if
  the system is already uptodate, which normally only takes 15 seconds
  or so.

  "man apt.conf" shows this info:

         ForceIPv4
             When downloading, force to use only the IPv4 protocol.

         ForceIPv6
             When downloading, force to use only the IPv6 protocol.

  So no feature "RFC6555" or "HappyEyeballs".

  An ugly work-around is this: Create a file
  /etc/apt/apt.conf.d/99timeout with these contents

  Acquire::http::Timeout "2";
  Acquire::ftp::Timeout "2";

  That way, after 2 seconds the other path is chosen.

  $ lsb_release -rd
  Description:	Ubuntu 14.04 LTS
  Release:	14.04

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: apt 1.0.1ubuntu2
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Apr 15 20:26:25 2014
  InstallationDate: Installed on 2014-04-10 (4 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140410)
  SourcePackage: apt
  UpgradeStatus: No upgrade log present (probably fresh install)

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