[Pkg-utopia-maintainers] Bug#859068: avahi-daemon race condition with ifupdown networking

[Matt Zagrabelny]

Package: avahi-daemon
Version: 0.6.32-2
Severity: normal

Greetings,

It appears that avahi-daemon is configuring eth0 before ifupdown can:

# journalctl -b | egrep 'ifup|avahi.*eth0'
Mar 29 20:20:52 achilles avahi-daemon[690]: Joining mDNS multicast group on interface eth0.IPv4 with address 131.212.60.13.
Mar 29 20:20:52 achilles avahi-daemon[690]: New relevant interface eth0.IPv4 for mDNS.
Mar 29 20:20:52 achilles avahi-daemon[690]: Registering new address record for 131.212.60.13 on eth0.IPv4.
Mar 29 20:20:52 achilles avahi-daemon[690]: Registering new address record for 131.212.60.15 on eth0.IPv4.
Mar 29 20:20:57 achilles avahi-daemon[690]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::210:18ff:fe5c:c3ad.
Mar 29 20:20:57 achilles avahi-daemon[690]: New relevant interface eth0.IPv6 for mDNS.
Mar 29 20:20:57 achilles avahi-daemon[690]: Registering new address record for fe80::210:18ff:fe5c:c3ad on eth0.*.
Mar 29 20:21:05 achilles ifup[717]: RTNETLINK answers: File exists
Mar 29 20:21:05 achilles ifup[717]: ifup: failed to bring up eth0
Mar 29 20:21:06 achilles avahi-daemon[690]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::210:18ff:fe5c:c3ad.
Mar 29 20:21:06 achilles avahi-daemon[690]: Joining mDNS multicast group on interface eth0.IPv6 with address 2607:ea00:200:60::13.
Mar 29 20:21:06 achilles avahi-daemon[690]: Registering new address record for 2607:ea00:200:60::13 on eth0.*.
Mar 29 20:21:06 achilles avahi-daemon[690]: Withdrawing address record for fe80::210:18ff:fe5c:c3ad on eth0.

ifup is failing with the "RTNETLINK answers: File exists" error.

This system is running sid, but was initially installed years ago, so there
may be some vestigial issues that are confounding things.

Let me know what you think.

Thanks!

-- System Information:
Debian Release: 9.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.10.0-trunk-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages avahi-daemon depends on:
ii  adduser              3.115
ii  bind9-host [host]    1:9.10.3.dfsg.P4-12.1
ii  dbus                 1.10.16-1
ii  init-system-helpers  1.47
ii  libavahi-common3     0.6.32-2
ii  libavahi-core7       0.6.32-2
ii  libc6                2.24-9
ii  libcap2              1:2.25-1
ii  libdaemon0           0.14-6
ii  libdbus-1-3          1.10.16-1
ii  libexpat1            2.2.0-2
ii  lsb-base             9.20161125

Versions of packages avahi-daemon recommends:
pn  libnss-mdns  <none>

Versions of packages avahi-daemon suggests:
pn  avahi-autoipd  <none>

-- Configuration Files:
/etc/network/if-up.d/avahi-daemon [Errno 2] No such file or directory: '/etc/network/if-up.d/avahi-daemon'

-- no debconf information