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

[MDE]

Yes, it seems to have something with pipelining, so I disabled it with
the following configuration:

    Acquire {
       http::Pipeline-Depth "0";
   };

I have some machines updating with this setting for 2 days without errors now. The performance impact seems insignificant (I have low RTT connections).
I also had the error occur on official mirrors, local mirrors with apache, and local mirrors with lighty before this.

I hope this helps fixing 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
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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