[Bug 1766542] Re: Installation blocks when the machine is behind a proxy server

[Julian Andres Klode]

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

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https://bugs.launchpad.net/bugs/1766542

Title:
  Installation blocks when the machine is behind a proxy server

Status in OEM Priority Project:
  Confirmed
Status in apt package in Ubuntu:
  Fix Released
Status in ubiquity package in Ubuntu:
  Incomplete
Status in apt source package in Bionic:
  In Progress
Status in ubiquity source package in Bionic:
  New

Bug description:
  [Impact]
  APT takes a long time to notice when certain connections time out

  [Test case]
  * Change the default route to not route stuff successfully (wrong gateway, 
    for example)
  * Make your sources.list look like this:

  deb http://archive.ubuntu.com/ubuntu bionic main restricted
  deb http://archive.ubuntu.com/ubuntu bionic-updates main restricted

  * Run apt update

  You should see that it fails with a long verbose error message for the
  first entry, with all possible IP addresses listed in it; while for
  the second one it fails with just "Unable to connect to
  archive.ubuntu.com:http:" as it recognizes it has been blacklisted.

  [Original bug report]
  When the machine is behind a proxy server, the installation will block for a while (several minutes) to retrieve the package lists. The timeouts are too long and makes user feels the machine may have some problems.

  The symptom is similar with bug #14599, but it seems the apt-setup
  module was rewritten.

  Another method to trigger this issue is to make the machine cannot
  access to the Internet, for instance: a wrong gateway.

  Image: 16.04

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