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[Launchpad Bug Tracker <1342865@xxxxxxxxxxxxxxxxxx>]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: avahi (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1342865

Title:
  avahi-daemon causes long delays at shutdown

Status in avahi package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 14.04 server amd64 (text console only, no X)

  At shutdown time, on a server which has a large number of interfaces,
  avahi-daemon causes delays of approximately 10 seconds per interface.

  On this test system (Mac Mini): it normally takes 2 seconds from
  typing "reboot" to the screen going black. But if avahi-daemon is
  installed:

  * with lo + eth0 in /etc/network/interfaces it takes 12 seconds
  * with lo + eth0 + eth1 in /etc/network/interfaces it takes 22 seconds
  * with lo + 36 other interfaces in /etc/network/interfaces it takes slightly over 6 minutes.

  The latter system has these:

  auto lo
  auto tap9
  auto br9
  auto tap8
  auto br8
  auto tap7
  auto br7
  auto tap6
  auto br6
  auto tap5
  auto br5
  auto tap4
  auto br4
  auto tap3
  auto br3
  auto tap2
  auto br2
  auto tap1
  auto br1
  auto eth1
  auto br-wan
  auto eth0
  auto tap10
  auto tap11
  auto tap12
  auto tap13
  auto tap14
  auto tap15
  auto tap16
  auto tap17
  auto tap18
  auto tap19
  auto br-lan
  auto br-lan:0
  auto br-lan:1
  auto eth0.255
  auto br-svc

  Of these, only four have static IP addresses, and one has a DHCP
  address. The others exist purely to create internal bridges and taps.

  It was very hard to isolate this bug, given that no messages are shown
  at shutdown (separate bug #1342856 for that)

  But consistently if I do
    apt-get remove avahi-daemon
  the problem goes away (it becomes 2 or 3 seconds to shutdown)

  and
    apt-get install avahi-daemon
  brings it back.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: avahi-daemon 0.6.31-4ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2
  Uname: Linux 3.13.0-30-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  Date: Wed Jul 16 17:22:13 2014
  InstallationDate: Installed on 2014-07-16 (0 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: avahi
  UpgradeStatus: No upgrade log present (probably fresh install)

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