[Bug 1010045] Re: 12.04 hangs on shutdown deconfiguring network interfaces

[David Martin]

We have "dns-nameservers 127.0.0.1" set in /etc/network/interfaces under
the "eth1" entry. Do you think that moving it to "lo" might help?

Yesterday I tried to stop the network before shutdown and everything
went fine and fast, and that makes me feel better. In the worst case we
may fix the shutdown scripts (crond) with little danger.

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https://bugs.launchpad.net/bugs/1010045

Title:
  12.04 hangs on shutdown deconfiguring network interfaces

Status in “ifupdown” package in Ubuntu:
  Incomplete

Bug description:
  When shutting down the 12.04 guest, it hangs on "Deconfiguring network
  interfaces...", when there are multiple networkcards.

  The system is going down for halt NOW!
   * Stopping web server apache2                                           [ OK ]  ... waiting 
   * Stopping Bacula File daemon...                                        [ OK ] 
  Checking for running unattended-upgrades: 
   * Running nssldap-update-ignoreusers...                                 [ OK ] 
   * Stopping Name Service Cache Daemon nscd                               [ OK ] 
   * Stopping Postfix Mail Transport Agent postfix                         [ OK ] 
   * Stopping ftp server proftpd                                           [ OK ] 
   * Asking all remaining processes to terminate...                        [ OK ] 
   * All processes ended within 2 seconds....                              [ OK ] 
  rpcbind: rpcbind terminating on signal. Restart with "rpcbind -w"
   * Deconfiguring network interfaces...                                          

  <hang>

  We only have this issue when a vm has multiple network cards assigned.
  When we do a manual "/etc/init.d/network stop; halt", the vm shuts down like expected.

  dpkg -l | grep ifupdown
  ii  ifupdown                         0.7~beta2ubuntu8              high level tools to configure network interfaces

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