This bug was fixed in the package apt - 1.6~alpha7ubuntu1
---------------
apt (1.6~alpha7ubuntu1) bionic; urgency=medium
* Try to work around test-method-mirror failure by setting umask at
start
-- Julian Andres Klode <juli...@ubuntu.com> Wed, 31 Jan 2018 12:19:58
+0100
** Changed in: apt (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1308200
Title:
apt-get not RFC6555 (Happy Eyeballs) compliant
Status in apt package in Ubuntu:
Fix Released
Status in apt package in Debian:
Fix Released
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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