GNU bug report logs - #41878
'guix substitute' and 'guix pull' fail gracelessly on flaky networks

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From: Bengt Richter <bokr <at> bokr.com>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 41878 <at> debbugs.gnu.org, Quinten Gruenthal <quintengruenthal <at> gmail.com>
Subject: bug#41878: Handshake Error
Date: Tue, 16 Jun 2020 11:31:12 +0200

Hi,

On +2020-06-16 10:07:51 +0200, Ludovic Courtès wrote:
> Hi,
> 
> Quinten Gruenthal <quintengruenthal <at> gmail.com> skribis:
> 
> > Sure; though, as I mentioned before I did try again and it did work. Doing
> > a pull once more I failed with:
> >
> > guix substitute: error: TLS error in procedure 'handshake': Error in the
> > pull function.
> > substitution of
> > /gnu/store/k1da7bv579d8gvwdrakd9l4hxswknff2-guix-module-union failed
> > guix pull: error: some substitutes for the outputs of derivation
> > `/gnu/store/k2gdq7ahjaqmdgjr9xwywqpxvzazn467-guix-e07573432.drv' failed
> > (usually happens due to networking issues); try `--fallback' to build
> > derivation from source
> 
> Could it be that you’re on a flaky network connection?
> 
> > As with before, I was also able to succeed on a subsequent pull; but this
> > error seemed to be handled better as it suggested both the cause of the
> > problem and a possible solution.
> 
> If the connection is dropped, there’s little we can do, but maybe you’re
> suggesting better error reporting?

Hm, are gexp's checkpointable?

Some ftp can reconnect and continue, IUUC. Idk how that works with https.
Can one adjust timeouts? Continue on an alternate mirror?
E.g. for downloading substitutes?

In general, I hate it when I get 1.0GB through a 1.1GB ISO and lose it all,
esp when I pay by GBs. Can guix help? :)

BTW, I think I have heard of security risks in restarting, but perhaps
with end-to-end integrity checks it is not an issue despite poss MM trying?

> 
> Thanks,
> Ludo’.
> 
> PS: Please keep the bug Cc’d.
> 
> 
> 

-- 
Regards,
Bengt Richter

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