[Bug 1801338] [NEW] apt fails to properly handle server-side connection closure

[Julian Andres Klode]

Public bug reported:

[Impact]
In some cases, apt does not correctly handle server-side connection closure after a pipeline, and aborts the file being downloaded with an "Undetermined Error" when the connection has been closed.

[Test case]
This could be seen by running apt build-dep evince on cosmic with a recent apt with the pipelining fix (such as 1.6.6) against a local mirror running apache from trusty. It remains to be seen whether this is easily reproducible for anyone.

[Regression potential]
N/A yet.

** Affects: apt (Ubuntu)
     Importance: Undecided
         Status: Triaged

** Affects: apt (Ubuntu Xenial)
     Importance: Undecided
         Status: New

** Affects: apt (Ubuntu Bionic)
     Importance: Undecided
         Status: Triaged

** Affects: apt (Ubuntu Cosmic)
     Importance: Undecided
         Status: Triaged


** Tags: regression-update

** Tags added: regression-update

** Also affects: apt (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Also affects: apt (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: apt (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1801338

Title:
  apt fails to properly handle server-side connection closure

Status in apt package in Ubuntu:
  Triaged
Status in apt source package in Xenial:
  New
Status in apt source package in Bionic:
  Triaged
Status in apt source package in Cosmic:
  Triaged

Bug description:
  [Impact]
  In some cases, apt does not correctly handle server-side connection closure after a pipeline, and aborts the file being downloaded with an "Undetermined Error" when the connection has been closed.

  [Test case]
  This could be seen by running apt build-dep evince on cosmic with a recent apt with the pipelining fix (such as 1.6.6) against a local mirror running apache from trusty. It remains to be seen whether this is easily reproducible for anyone.

  [Regression potential]
  N/A yet.

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