** Changed in: isc-dhcp (Ubuntu)
   Importance: Undecided => Medium

** Changed in: isc-dhcp (Ubuntu)
       Status: New => Confirmed

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  dhclient -1 exits 0 when no lease found

Status in isc-dhcp package in Ubuntu:

Bug description:
  I've tried this in containers of xenial, trusty and yakkety.

  i've created a lxc network that does not have dhcp4.

  See https://github.com/lxc/lxd/issues/2481 for some info on how to do

  Then, I launch an instance:

  $ lxc launch ubuntu-daily:xenial --profile=sm-test-profile2 x1
  % killall dhclient
  % dhclient -r eth0
  % dhclient -1 -v eth0
  Internet Systems Consortium DHCP Client 4.3.3
  Copyright 2004-2015 Internet Systems Consortium.
  All rights reserved.
  For info, please visit https://www.isc.org/software/dhcp/

  Listening on LPF/eth0/00:16:3e:b8:e6:70
  Sending on   LPF/eth0/00:16:3e:b8:e6:70
  Sending on   Socket/fallback
  DHCPDISCOVER on eth0 to port 67 interval 3 (xid=0xc08cb53c)

  DHCPDISCOVER on eth0 to port 67 interval 4 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to port 67 interval 9 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to port 67 interval 19 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to port 67 interval 7 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to port 67 interval 12 (xid=0xc08cb53c)
  No DHCPOFFERS received.
  No working leases in persistent database - sleeping.

  % echo $?
  % ps axw | grep dhcl
    356 ?        Ss     0:00 dhclient -1 -v eth0

  the man page says of the '-1' option:
         -1     Try to get a lease once.  On  failure  exit  with  code  2.   In
                DHCPv6 this sets the maximum duration of the initial exchange to
                timeout (from dhclient.conf with a default of sixty seconds).

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: isc-dhcp-client 4.3.3-5ubuntu15
  ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
  Uname: Linux 4.8.0-22-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Oct 14 16:59:45 2016

  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-23 (449 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)

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