[Bug 1752737] Re: [2.3.0-6434] mDNS observer problems

[Trent Lloyd]

** Changed in: avahi (Ubuntu)
     Assignee: (unassigned) => Trent Lloyd (lathiat)

** Changed in: avahi (Ubuntu)
   Importance: Undecided => Medium

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Title:
  [2.3.0-6434] mDNS observer problems

Status in Avahi:
  New
Status in avahi package in Ubuntu:
  Confirmed

Bug description:
  I see avahi-browser choking on non-utf8 characters in my rackd.log:

  ==> rackd.log <==
  2018-02-28 16:54:33 provisioningserver.utils.services: [info] mDNS observation process started.
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: Traceback (most recent call last):
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/maas/maas-common", line 87, in <module>
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: main()
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/maas/maas-common", line 83, in main
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: run()
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/maas/maas-common", line 52, in run
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: from provisioningserver.__main__ import main
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/python3/dist-packages/provisioningserver/__main__.py", line 55, in <module>
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: main()
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/python3/dist-packages/provisioningserver/utils/script.py", line 91, in __call__
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: self.execute(argv)
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/python3/dist-packages/provisioningserver/utils/script.py", line 86, in execute
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: args.handler.run(args)
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/python3/dist-packages/provisioningserver/utils/avahi.py", line 221, in run
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: _observe_mdns(reader, output, args.verbose)
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/python3/dist-packages/provisioningserver/utils/avahi.py", line 145, in _observe_mdns
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: for event in observer(events):
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/python3/dist-packages/provisioningserver/utils/avahi.py", line 161, in _observe_resolver_found
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: for event in filter(_p_resolver_found, events):
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/python3/dist-packages/provisioningserver/utils/avahi.py", line 125, in _extract_mdns_events
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: for event in map(parse_avahi_event, lines):
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: File "/usr/lib/python3.5/codecs.py", line 321, in decode
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: (result, consumed) = self._buffer_decode(data, self.errors, final)
  2018-02-28 16:54:36 provisioningserver.utils.services: [info] observe-mdns: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xc8 in position 240: invalid continuation byte
  2018-02-28 16:54:36 provisioningserver.utils.services: [critical] mDNS observation process failed.

  Traceback (most recent call last):
  Failure: twisted.internet.error.ProcessTerminated: A process has ended with a probable error condition: process ended with exit code 1.

  ==> regiond.log <==
  2018-02-28 16:54:50 regiond: [info] ::1 GET /MAAS/rpc/ HTTP/1.0 --> 200 OK (referrer: -; agent: provisioningserver.rpc.clusterservice.ClusterClientService)
  2018-02-28 16:55:20 regiond: [info] ::1 GET /MAAS/rpc/ HTTP/1.0 --> 200 OK (referrer: -; agent: provisioningserver.rpc.clusterservice.ClusterClientService)

  ==> maas.log <==
  Feb 28 16:53:52 MAAS-RC01 maas.interface: [info] ens33 (physical) on MAAS-RC01: New MAC, IP binding observed: 08:eb:74:ca:d3:6f, 192.168.1.82

  Similar traceback when running from command line:

  maasuser at MAAS-RC01:~$ maas-rack observe-mdns
  {"hostname": "Apple-TV", "interface": "ens33", "address": "192.168.1.81"}
  Got SIGTERM, quitting.
  Traceback (most recent call last):
    File "/usr/sbin/maas-rack", line 87, in <module>
      main()
    File "/usr/sbin/maas-rack", line 83, in main
      run()
    File "/usr/sbin/maas-rack", line 52, in run
      from provisioningserver.__main__ import main
    File "/usr/lib/python3/dist-packages/provisioningserver/__main__.py", line 55, in <module>
      main()
    File "/usr/lib/python3/dist-packages/provisioningserver/utils/script.py", line 91, in __call__
      self.execute(argv)
    File "/usr/lib/python3/dist-packages/provisioningserver/utils/script.py", line 86, in execute
      args.handler.run(args)
    File "/usr/lib/python3/dist-packages/provisioningserver/utils/avahi.py", line 221, in run
      _observe_mdns(reader, output, args.verbose)
    File "/usr/lib/python3/dist-packages/provisioningserver/utils/avahi.py", line 145, in _observe_mdns
      for event in observer(events):
    File "/usr/lib/python3/dist-packages/provisioningserver/utils/avahi.py", line 161, in _observe_resolver_found
      for event in filter(_p_resolver_found, events):
    File "/usr/lib/python3/dist-packages/provisioningserver/utils/avahi.py", line 125, in _extract_mdns_events
      for event in map(parse_avahi_event, lines):
    File "/usr/lib/python3.5/codecs.py", line 321, in decode
      (result, consumed) = self._buffer_decode(data, self.errors, final)
  UnicodeDecodeError: 'utf-8' codec can't decode byte 0xc8 in position 228: invalid continuation byte

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