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[Bug 1534501] Re: [URGENT] dnsmasq errors fills up syslogs extremely fast

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Jeffery Wilkins <djcanadianjeff@xxxxxxxxx>
Date: Fri, 15 Jan 2016 09:16:59 -0000
Reply-to: Bug 1534501 <1534501@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
this bug was filling up syslog at a rate of 1MB per Second this could
fill up a disk really quickly

hence the URGENT label

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https://bugs.launchpad.net/bugs/1534501

Title:
  [URGENT] dnsmasq errors fills up syslogs extremely fast

Status in dnsmasq package in Ubuntu:
  New
Status in network-manager package in Ubuntu:
  New
Status in rsyslog package in Ubuntu:
  New

Bug description:
  snippet of logs.....

  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30416]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30416]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.397836] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30429]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30429]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.407691] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30442]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30442]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.419365] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30455]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30455]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.430292] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30468]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30468]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.441139] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30481]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30481]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.452439] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30495]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30495]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.462920] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30508]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30508]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.474603] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30521]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30521]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.484592] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30534]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30534]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.495432] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30547]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30547]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.506479] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30561]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30561]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.516853] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30574]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30574]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.527287] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30587]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30587]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.538370] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30600]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30600]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.548364] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: dnsmasq: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30613]: failed to create listening socket for 127.0.1.1: Address already in use
  Jan 15 00:28:24 localhost dnsmasq[30613]: FAILED to start up
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq exited with error: Network access problem (address in use; permissions; etc) (2)
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq child quit unexpectedly; refreshing DNS
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  DNS: starting dnsmasq...
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  dnsmasq not available on the bus, can't update servers.
  Jan 15 00:28:24 localhost NetworkManager[1211]: <error> [1452846504.559345] [dns-manager/nm-dns-dnsmasq.c:387] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name
  Jan 15 00:28:24 localhost NetworkManager[1211]: <warn>  DNS: plugin dnsmasq update failed
  Jan 15 00:28:24 localhost NetworkManager[1211]: <info>  Writing DNS information to /sbin/resolvconf

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: network-manager 1.0.4-0ubuntu7
  ProcVersionSignature: Ubuntu 4.3.0-5.16-generic 4.3.3
  Uname: Linux 4.3.0-5-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.19.3-0ubuntu3
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Fri Jan 15 00:29:43 2016
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.dnsmasq.d.network.manager: [deleted]
  nmcli-con: Error: command ['nmcli', '-f', 'all', 'con'] failed with exit code 8: Error: NetworkManager is not running.
  nmcli-dev: Error: command ['nmcli', '-f', 'all', 'dev'] failed with exit code 8: Error: NetworkManager is not running.
  nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.

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References

[Bug 1534501] [NEW] [URGENT] dnsmasq errors fills up syslogs extremely fast
From: Jeffery Wilkins, 2016-01-15