HA startup issue: "Error RemoteProtocolError: Server disconnected without sending a response. occurred in method async_update for Denon AVR receiver"

[jkfranks9]

The problem

I always see the following exception for my Marantz receiver when starting HA: "httpcore.RemoteProtocolError: Server disconnected without sending a response."

What version of Home Assistant Core has the issue?

2024.3.3

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Denon AVR Network Receivers

Link to integration documentation on our website

https://www.home-assistant.io/integrations/denonavr

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

2024-03-27 08:31:10.176 ERROR (MainThread) [homeassistant.components.denonavr.media_player] Error RemoteProtocolError: Server disconnected without sending a response. occurred in method async_update for Denon AVR receiver
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/httpx/_transports/default.py", line 69, in map_httpcore_exceptions
    yield
  File "/usr/local/lib/python3.12/site-packages/httpx/_transports/default.py", line 373, in handle_async_request
    resp = await self._pool.handle_async_request(req)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpcore/_async/connection_pool.py", line 216, in handle_async_request
    raise exc from None
  File "/usr/local/lib/python3.12/site-packages/httpcore/_async/connection_pool.py", line 196, in handle_async_request
    response = await connection.handle_async_request(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpcore/_async/connection.py", line 101, in handle_async_request
    return await self._connection.handle_async_request(request)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpcore/_async/http11.py", line 143, in handle_async_request
    raise exc
  File "/usr/local/lib/python3.12/site-packages/httpcore/_async/http11.py", line 113, in handle_async_request
    ) = await self._receive_response_headers(**kwargs)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpcore/_async/http11.py", line 186, in _receive_response_headers
    event = await self._receive_event(timeout=timeout)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpcore/_async/http11.py", line 238, in _receive_event
    raise RemoteProtocolError(msg)
httpcore.RemoteProtocolError: Server disconnected without sending a response.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/denonavr/decorators.py", line 47, in wrapper
    return await func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/denonavr/api.py", line 161, in async_post
    res = await client.post(
          ^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpx/_client.py", line 1892, in post
    return await self.request(
           ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpx/_client.py", line 1574, in request
    return await self.send(request, auth=auth, follow_redirects=follow_redirects)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpx/_client.py", line 1661, in send
    response = await self._send_handling_auth(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpx/_client.py", line 1689, in _send_handling_auth
    response = await self._send_handling_redirects(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpx/_client.py", line 1726, in _send_handling_redirects
    response = await self._send_single_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpx/_client.py", line 1763, in _send_single_request
    response = await transport.handle_async_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/httpx/_transports/default.py", line 372, in handle_async_request
    with map_httpcore_exceptions():
  File "/usr/local/lib/python3.12/contextlib.py", line 158, in __exit__
    self.gen.throw(value)
  File "/usr/local/lib/python3.12/site-packages/httpx/_transports/default.py", line 86, in map_httpcore_exceptions
    raise mapped_exc(message) from exc
httpx.RemoteProtocolError: Server disconnected without sending a response.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/denonavr/media_player.py", line 182, in wrapper
    return await func(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/denonavr/media_player.py", line 323, in async_update
    await receiver.async_update()
  File "/usr/local/lib/python3.12/site-packages/denonavr/denonavr.py", line 177, in async_update
    await self._device.async_verify_avr_2016_update_method(cache_id=cache_id)
  File "/usr/local/lib/python3.12/site-packages/denonavr/foundation.py", line 321, in async_verify_avr_2016_update_method
    await self.api.async_get_global_appcommand(cache_id=cache_id)
  File "/usr/local/lib/python3.12/site-packages/denonavr/api.py", line 250, in async_get_global_appcommand
    res = await self.async_post_appcommand(url, tags, cache_id=cache_id)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/denonavr/decorators.py", line 111, in wrapper
    return await cached_func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/asyncstdlib/_lrucache.py", line 429, in __call__
    result = await self.__wrapped__(*args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/denonavr/decorators.py", line 47, in wrapper
    return await func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/denonavr/api.py", line 205, in async_post_appcommand
    res = await self.async_post(request, content=content)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/denonavr/decorators.py", line 70, in wrapper
    raise AvrInvalidResponseError(
denonavr.exceptions.AvrInvalidResponseError: RemoteProtocolError: Server disconnected without sending a response.

Additional information

home-assistant_denonavr_2024-03-27T12-47-00.413Z.log

[home-assistant]

Hey there @ol-iver, @starkillerOG, mind taking a look at this issue as it has been labeled with an integration (denonavr) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of denonavr can trigger bot actions by commenting:

• @home-assistant close Closes the issue.
• @home-assistant rename Awesome new title Renames the issue.
• @home-assistant reopen Reopen the issue.
• @home-assistant unassign denonavr Removes the current integration label and assignees on the issue, add the integration domain after the command.
• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component) to the issue.
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[bdraco]

The receiver sometimes drops the connection but works on retry. We probably should retry once here if we don't already

[HAjerry]

I had similar error message: server disconnected without sending a response. For me it was resolved by disconnecting the power coord from my receiver and then putting it back again.