bug#46877: Guix assumes ideal network exists, does not

[Tobias Geerinckx-Rice via Bug reports for GNU Guix <bug-guix@gnu.org>]

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Guixfriends,

Errors like the one below are omnipresent.  It's a problem.

Expecting an ever-increasing (16k+?) number of requests to finish 
flawlessly or aborting a very long (20+ minutes here) process is 
doomed.

We don't seem to have a plan forward (I include myself!).  Looking 
at other package managers, a blunt ‘retry a finite number of 
times’ seems common.  Guix's ‘pretend that "transient" is a magic 
powerword’ approach less so.

What do people think?  Does the heavy pipelining complicate 
matters?

--8<---------------cut here---------------start------------->8---
~ $ guix weather --substitute-urls=https://guix.tobias.gr
computing 16,745 package derivations for x86_64-linux...
looking for 18,127 store items on https://guix.tobias.gr...
updating substitutes from 'https://guix.tobias.gr'... 
41.6%Backtrace:
          11 (primitive-load 
          "/home/nckx/.config/guix/current/bin/guix")
In guix/ui.scm:
  2164:12 10 (run-guix-command _ . _)
In ice-9/boot-9.scm:
  1736:10  9 (with-exception-handler _ _ #:unwind? _ 
  #:unwind-for-type _)
  1731:15  8 (with-exception-handler #<procedure 7fe8a173d7e0 at 
  ice-9/boot-9.scm:1815:7 (exn)> _ #:unwind? _ …)
In guix/scripts/weather.scm:
    546:9  7 (_)
In guix/build/utils.scm:
   569:23  6 (every* #<procedure 7fe875fdd4e0 at 
   guix/scripts/weather.scm:546:17 (server)> _)
In guix/scripts/weather.scm:
   547:19  5 (_ "https://guix.tobias.gr")
   116:17  4 (report-server-coverage _ _ #:display-missing? _)
In unknown file:
           3 (_ #<procedure 7fe86e3cbbe0 at 
           guix/scripts/weather.scm:184:2 ()> #<procedure list _> 
           . #w())
In guix/scripts/substitute.scm:
   411:23  2 (lookup-narinfos _ _ #:open-connection _)
   371:26  1 (fetch-narinfos _ _ #:open-connection _)
In ice-9/boot-9.scm:
  1669:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1669:16: In procedure raise-exception:
Throw to key `gnutls-error' with args `(#<gnutls-error-enum Error 
in the pull function.> read_from_session_record_port)'.
--8<---------------cut here---------------end--------------->8---

Kind regards,

T G-R

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