From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#33151: 'guix substitute' returns a 504 error without trying to
	use other servers
Date: Mon, 05 Nov 2018 22:33:16 +0100
Message-ID: <87zhunw6oz.fsf@gnu.org>
References: <87h8haf3ft.fsf@lassieur.org> <87h8h8d2c6.fsf@gnu.org>
	<87muqnn6ck.fsf@lassieur.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Return-path: <bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:34522)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1gJmW7-0003Oj-Li
	for bug-guix@gnu.org; Mon, 05 Nov 2018 16:34:40 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1gJmVW-0005a6-3z
	for bug-guix@gnu.org; Mon, 05 Nov 2018 16:34:02 -0500
Received: from debbugs.gnu.org ([208.118.235.43]:59746)
	by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16)
	(Exim 4.71) (envelope-from <Debian-debbugs@debbugs.gnu.org>)
	id 1gJmVV-0005a1-WD
	for bug-guix@gnu.org; Mon, 05 Nov 2018 16:34:02 -0500
Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2)
	(envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1gJmVV-0003ym-SM
	for bug-guix@gnu.org; Mon, 05 Nov 2018 16:34:01 -0500
Sender: "Debbugs-submit" <debbugs-submit-bounces@debbugs.gnu.org>
Resent-Message-ID: <handler.33151.B33151.154145361215261@debbugs.gnu.org>
In-Reply-To: <87muqnn6ck.fsf@lassieur.org> ("=?UTF-8?Q?Cl=C3=A9ment?=
	Lassieur"'s message of "Mon, 05 Nov 2018 11:53:15 +0100")
List-Id: Bug reports for GNU Guix <bug-guix.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/bug-guix>,
	<mailto:bug-guix-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/bug-guix/>
List-Post: <mailto:bug-guix@gnu.org>
List-Help: <mailto:bug-guix-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/bug-guix>,
	<mailto:bug-guix-request@gnu.org?subject=subscribe>
Errors-To: bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org
Sender: "bug-Guix" <bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org>
To: =?UTF-8?Q?Cl=C3=A9ment?= Lassieur <clement@lassieur.org>
Cc: 33151@debbugs.gnu.org

Hello Cl=C3=A9ment,

Cl=C3=A9ment Lassieur <clement@lassieur.org> skribis:

> I don't understand why you closed the bug report.  Your explanation of
> the bug makes sense, but it doesn't mean that it's fixed.
>
> I expect that when a substitute server is down, for whatever reason,
> Guix should still work smoothly if there is another server set up.
>
> If you think there is no way to fix it, maybe the tag "wontfix" would be
> more appropriate?

No I think you=E2=80=99re right, I shouldn=E2=80=99t have closed it.

I think my first thought was that the problem (narinfo available but
corresponding nar missing) was mostly due to our peculiar nginx setup on
mirror.hydra.gnu.org: this cannot happen under normal circumstances
because =E2=80=98guix publish=E2=80=99 really honors the expiry it sets on =
narinfos.

That said, we could fix =E2=80=98process-substitution=E2=80=99 in (guix scr=
ipts
substitute) to try other nar URLs (if any) upon failure.

IMO such a fix is not =E2=80=9Chigh-priority=E2=80=9D for the reason I gave=
 above, but
OTOH it can be helpful to better cope with the sad reality of situations
like the one we=E2=80=99re in.

Thoughts?

Thanks for the heads-up, and sorry for hitting the =E2=80=9Cclose=E2=80=9D =
button too
quickly!

Ludo=E2=80=99.