AttributeError: 'NoneType' object has no attribute 'resume_reading'

The problem

I am getting a lot of errors related to aiohttp.server.

Environment

• Home Assistant Core release with the issue: core-2021.1.5
• Last working Home Assistant Core release (if known): -
• Operating environment (OS/Container/Supervised/Core): OS in Proxmox VM
• Integration causing this issue:
• Link to integration documentation on our website:

Problem-relevant configuration.yaml

Traceback/Error logs

Logger: aiohttp.server
Source: /usr/local/lib/python3.8/site-packages/aiohttp/web_protocol.py:393
First occurred: 11:02:05 (3 occurrences)
Last logged: 11:02:05
Unhandled exception

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 1152, in _sendfile_fallback
    read = await self.run_in_executor(None, file.readinto, view)
asyncio.exceptions.CancelledError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/aiohttp/web_protocol.py", line 485, in start
    resp, reset = await task
  File "/usr/local/lib/python3.8/site-packages/aiohttp/web_protocol.py", line 440, in _handle_request
    reset = await self.finish_response(request, resp, start_time)
  File "/usr/local/lib/python3.8/site-packages/aiohttp/web_protocol.py", line 591, in finish_response
    await prepare_meth(request)
  File "/usr/local/lib/python3.8/site-packages/aiohttp/web_fileresponse.py", line 241, in prepare
    return await self._sendfile(request, fobj, offset, count)
  File "/usr/local/lib/python3.8/site-packages/aiohttp/web_fileresponse.py", line 96, in _sendfile
    await loop.sendfile(transport, fobj, offset, count)
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 1131, in sendfile
    return await self._sendfile_fallback(transport, file,
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 1161, in _sendfile_fallback
    await proto.restore()
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 263, in restore
    self._transport.resume_reading()
  File "/usr/local/lib/python3.8/asyncio/sslproto.py", line 344, in resume_reading
    self._ssl_protocol._transport.resume_reading()
AttributeError: 'NoneType' object has no attribute 'resume_reading'

Additional information

[mglukhankov]

I had this error after a recent update. The main problem was http.base_url. It is not supported anymore. So I removed it from the config. I had to add homeassistant.external_url and tts.base_url. Then I got this error. Adding homeassistant.internal_url fixed it.

homeassistant:
  internal_url: https://192.168.1.20:4312
  external_url: https://myac.duckdns.org:4312

tts:
  - platform: google_translate
    service_name: google_say
    base_url: https://myac.duckdns.org:4312

Make sure there is no slash / at the end of URLs.

[Danifont]

Same problem here, anybody found a solution for this? I can’t access from my duckdns url. only with the internal IP address.

2021-03-25 09:44:49 ERROR (MainThread) [aiohttp.server] Unhandled exception Traceback (most recent call last): File “/usr/local/lib/python3.8/asyncio/base_events.py”, line 1152, in _sendfile_fallback read = await self.run_in_executor(None, file.readinto, view) asyncio.exceptions.CancelledError

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File “/usr/local/lib/python3.8/site-packages/aiohttp/web_protocol.py”, line 485, in start resp, reset = await task File “/usr/local/lib/python3.8/site-packages/aiohttp/web_protocol.py”, line 440, in _handle_request reset = await self.finish_response(request, resp, start_time) File “/usr/local/lib/python3.8/site-packages/aiohttp/web_protocol.py”, line 591, in finish_response await prepare_meth(request) File “/usr/local/lib/python3.8/site-packages/aiohttp/web_fileresponse.py”, line 241, in prepare return await self._sendfile(request, fobj, offset, count) File “/usr/local/lib/python3.8/site-packages/aiohttp/web_fileresponse.py”, line 96, in _sendfile await loop.sendfile(transport, fobj, offset, count) File “/usr/local/lib/python3.8/asyncio/base_events.py”, line 1131, in sendfile return await self._sendfile_fallback(transport, file, File “/usr/local/lib/python3.8/asyncio/base_events.py”, line 1161, in _sendfile_fallback await proto.restore() File “/usr/local/lib/python3.8/asyncio/base_events.py”, line 263, in restore self._transport.resume_reading() File “/usr/local/lib/python3.8/asyncio/sslproto.py”, line 344, in resume_reading self._ssl_protocol._transport.resume_reading() AttributeError: ‘NoneType’ object has no attribute ‘resume_reading’

In my case, it was a problem with the service provider, it change me to CGNAT without permission or any advice, and all the packets does not have answer. After some calls and back to no CGNAT all works again. It seems it was a problem of communications, check gateways, firewalls, proxies, etc.

Dani.