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

[Robert Liu]

I met the issue when installing packages from a private PPA of
Launchpad. Hope this would be helpful to reproduce the issue.

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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:
  Confirmed
Status in apt source package in Bionic:
  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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