Report forwarded
to bug-guix@gnu.org: bug#69442; Package guix.
(Tue, 27 Feb 2024 23:41:02 GMT) (full text, mbox, link).
Acknowledgement sent
to Ludovic Courtès <ludo@gnu.org>:
New bug report received and forwarded. Copy sent to bug-guix@gnu.org.
(Tue, 27 Feb 2024 23:41:02 GMT) (full text, mbox, link).
Subject: Discovered substitute servers not removed when they go offline
Date: Wed, 28 Feb 2024 00:05:29 +0100
Hello,
Substitute servers discovered over Avahi don’t disappear when they go
off-line: they remain in /var/guix/discover/publish “forever” (?) and
‘guix substitute’ keeps trying to connect to them, in vain.
The problem AIUI is that the mDNS records are still valid according to
their TTL and thus cached by avahi-daemon; we can only notice that
things go wrong when trying to resolve:
--8<---------------cut here---------------start------------->8---
$ avahi-browse _guix_publish._tcp -r
+ enp0s31f6 IPv6 guix-publish-xyz _guix_publish._tcp local
+ enp0s31f6 IPv4 guix-publish-xyz _guix_publish._tcp local
Failed to resolve service 'guix-publish-xyz' of type '_guix_publish._tcp' in domain 'local': Timeout reached
Failed to resolve service 'guix-publish-xyz' of type '_guix_publish._tcp' in domain 'local': Timeout reached
--8<---------------cut here---------------end--------------->8---
(One way to reproduce that is to ‘pkill -9 avahi-daemon’ on the machine
that advertises the service.)
Problem is that ‘avahi-browse-service-thread’ attempts to resolve
services once for all; thus it never notices that services went away, at
least not until some long TTL has expired.
Ludo’.
Severity set to 'important' from 'normal'
Request was from Ludovic Courtès <ludo@gnu.org>
to control@debbugs.gnu.org.
(Thu, 04 Apr 2024 21:37:03 GMT) (full text, mbox, link).
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