zeroconf.NonUniqueNameException

[sderuiter]

Hi,

My setup:
1 Pi Zero W with camera module running Homebridge
1 Pi Zero W with camera module running HAP-python

The homebridge instance works perfectly, but now I want to add another Homekit instance using HAP-python.

HAP-python runs fine (on the second Pi) using python busy-home.py.

However, doing python camera-main.py yields (after pairing):

`[accessory_driver] Paired with bfe57bae-cd06-4a0a-ba31-e3f86fa89396.
[zeroconf] Unknown error, possibly benign: KeyError('camera._hap._tcp.local.',)
Traceback (most recent call last):
  File "/home/pi/berryconda3/lib/python3.6/site-packages/zeroconf.py", line 1871, in unregister_service
    del self.services[info.name.lower()]
KeyError: 'camera._hap._tcp.local.'
----------------------------------------
Exception happened during processing of request from ('192.168.178.46', 65309)
Traceback (most recent call last):
  File "/home/pi/berryconda3/lib/python3.6/socketserver.py", line 639, in process_request_thread
    self.finish_request(request, client_address)
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/hap_server.py", line 853, in finish_request
    self, self.accessory_handler)
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/hap_server.py", line 143, in __init__
    super(HAPServerHandler, self).__init__(sock, client_addr, server)
  File "/home/pi/berryconda3/lib/python3.6/socketserver.py", line 696, in __init__
    self.handle()
  File "/home/pi/berryconda3/lib/python3.6/http/server.py", line 420, in handle
    self.handle_one_request()
  File "/home/pi/berryconda3/lib/python3.6/http/server.py", line 406, in handle_one_request
    method()
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/hap_server.py", line 204, in dispatch
    getattr(self, self.HANDLERS[self.command][path])()
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/hap_server.py", line 539, in handle_pairings
    self._handle_add_pairing(tlv_objects)
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/hap_server.py", line 552, in _handle_add_pairing
    client_uuid, client_public)
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/accessory_driver.py", line 500, in pair
    self.update_advertisement()
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/accessory_driver.py", line 464, in update_advertisement
    self.advertiser.register_service(self.mdns_service_info)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/zeroconf.py", line 1836, in register_service
    self.check_service(info, allow_name_change)
  File "/home/pi/berryconda3/lib/python3.6/site-packages/zeroconf.py", line 1952, in check_service
    raise NonUniqueNameException
zeroconf.NonUniqueNameException
----------------------------------------`

Somehow there seems to be a conflict with the other camera registered through homebridge?

Anyone seen this before?

Edit: after some googling, I found this issue in Home-assistant, which reports the same error.

Edit 2: dug slightly deeper. After patching accessory_driver.py at line 186 to change self.safe_mode = False to self.safe_mode = True, the error disappears. However, the stream does start and another error occurs.

...
camera] [df5875a9-2798-49aa-aa18-51654b39ea76] Started stream process - PID 7322
[camera] [df5875a9-2798-49aa-aa18-51654b39ea76] Stopping stream.
[hap_server] 192.168.178.20 - "PUT /characteristics HTTP/1.1" 204 -
[base_events] Task exception was never retrieved
future: <Task finished coro=<Camera._stop_stream() done, defined at /home/pi/.local/lib/python3.6/site-packages/pyhap/camera.py:549> exception=ProcessLookupError()>
Traceback (most recent call last):
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/camera.py", line 567, in _stop_stream
    await self.stop_stream(session_info)
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/camera.py", line 806, in stop_stream
    ffmpeg_process.terminate()
  File "/home/pi/berryconda3/lib/python3.6/asyncio/subprocess.py", line 135, in terminate
    self._transport.terminate()
  File "/home/pi/berryconda3/lib/python3.6/asyncio/base_subprocess.py", line 155, in terminate
    self._check_proc()
  File "/home/pi/berryconda3/lib/python3.6/asyncio/base_subprocess.py", line 148, in _check_proc
    raise ProcessLookupError()
ProcessLookupError

Edit 3: In the above output, there is a process PID 7322 that is created to start the stream process. This process however never exists.

ps -p 7322
  PID TTY          TIME CMD

So something is preventing this process to happen...

Output from logging at DEBUG level (with a different PID of course):

camera] [191b6d96-2ce1-45f7-8d9e-877c3ebfe38c] Starting stream with the following parameters: {'v_profile_id': b'\x02', 'v_level': b'\x02', 'width': 640, 'height': 360, 'fps': 30, 'v_ssrc': 1, 'v_payload_type': b'c', 'v_max_bitrate': 132, 'v_rtcp_interval': 0.5, 'v_max_mtu': b'b\x05', 'a_codec': b'\x02', 'a_comfort_noise': b'\x00', 'a_channel': 1, 'a_bitrate': False, 'a_sample_rate': 16, 'a_packet_time': 30, 'a_ssrc': b'\x01', 'a_payload_type': b'n', 'a_max_bitrate': 24, 'a_rtcp_interval': 5.0, 'a_comfort_payload_type': b'\r', 'id': UUID('191b6d96-2ce1-45f7-8d9e-877c3ebfe38c'), 'address': '192.168.178.20', 'v_port': 63706, 'v_srtp_key': 'pO0Jau/GlU/Z8oCdBRY5vvu7/88RZQlAnV2morl0', 'a_port': 52473, 'audio_srtp_key': 'tALco2OhIqkSsgGtavDNwjkqYok/tJWG8RwwHuHY'}
[hap_server] 192.168.178.20 - "PUT /characteristics HTTP/1.1" 204 -
[camera] Executing start stream command: "ffmpeg -re -f avfoundation -i 0:0 -threads 0 -vcodec libx264 -an -pix_fmt yuv420p -r 30 -f rawvideo -tune zerolatency -vf scale=640:360 -b:v 132k -bufsize 132k -payload_type 99 -ssrc 1 -f rtp -srtp_out_suite AES_CM_128_HMAC_SHA1_80 -srtp_out_params pO0Jau/GlU/Z8oCdBRY5vvu7/88RZQlAnV2morl0 srtp://192.168.178.20:63706?rtcpport=63706&localrtcpport=63706&pkt_size=1378"
[camera] [191b6d96-2ce1-45f7-8d9e-877c3ebfe38c] Started stream process - PID 8085
[hap_server] Request PUT from address '('192.168.178.20', 54279)' for path '/characteristics'.
[hap_server] Set characteristics content: {'characteristics': [{'aid': 1, 'iid': 15, 'value': 'ARUCAQABEBkbbZYs4UX3jZ6HfD6/44w='}]}
[characteristic] client_update_value: SelectedRTPStreamConfiguration to ARUCAQABEBkbbZYs4UX3jZ6HfD6/44w=
[camera] set_selected_stream_config - value - ARUCAQABEBkbbZYs4UX3jZ6HfD6/44w=
[camera] Set stream config request: 0
[hap_server] 192.168.178.20 - "PUT /characteristics HTTP/1.1" 204 -
[camera] [191b6d96-2ce1-45f7-8d9e-877c3ebfe38c] Stopping stream.
[base_events] Task exception was never retrieved
future: <Task finished coro=<Camera._stop_stream() done, defined at /home/pi/.local/lib/python3.6/site-packages/pyhap/camera.py:549> exception=ProcessLookupError()>
Traceback (most recent call last):
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/camera.py", line 567, in _stop_stream
    await self.stop_stream(session_info)
  File "/home/pi/.local/lib/python3.6/site-packages/pyhap/camera.py", line 806, in stop_stream
    ffmpeg_process.terminate()
  File "/home/pi/berryconda3/lib/python3.6/asyncio/subprocess.py", line 135, in terminate
    self._transport.terminate()
  File "/home/pi/berryconda3/lib/python3.6/asyncio/base_subprocess.py", line 155, in terminate
    self._check_proc()
  File "/home/pi/berryconda3/lib/python3.6/asyncio/base_subprocess.py", line 148, in _check_proc
    raise ProcessLookupError()
ProcessLookupError

[sbilly]

I have meet the zeroconf.NonUniqueNameException issue (home-assistant/core#17181).

In my case it caused by name conflicts. I add cache-entries-max=0 to avahi-daemon.conf , and restart avahi-daemon, everything just work.

Please check this: avahi/avahi#117 (comment)

[golles]

Thank you so much @sbilly, this has fixed it for me!