HTTP 2.0 Throws KeyError rather than the internal exception thrown in the thread

[rocky4546]

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• Initially raised as discussion #...

We are running into a number of HTTP 2.0 protocol errors with a remote supplier. We have seen two exceptions that are raised internally, but when it makes it to the calling routine, it turns into a KeyError exception. Here are the exceptions:

EXCEPTION #1

Exception in thread Thread-809:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 148, in handle_request
status, headers = self._receive_response(
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 292, in _receive_response
event = self._receive_stream_event(request, stream_id)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 333, in _receive_stream_event
self._receive_events(request, stream_id)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 361, in _receive_events
events = self._read_incoming_data(request)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 454, in _read_incoming_data
events: typing.List[h2.events.Event] = self._h2_state.receive_data(data)
File "/usr/local/lib/python3.8/site-packages/h2/connection.py", line 1463, in receive_data
events.extend(self._receive_frame(frame))
File "/usr/local/lib/python3.8/site-packages/h2/connection.py", line 1487, in _receive_frame
frames, events = self._frame_dispatch_tableframe.class
File "/usr/local/lib/python3.8/site-packages/h2/connection.py", line 1561, in receive_headers_frame
frames, stream_events = stream.receive_headers(
File "/usr/local/lib/python3.8/site-packages/h2/stream.py", line 1041, in receive_headers
events = self.state_machine.process_input(input)
File "/usr/local/lib/python3.8/site-packages/h2/stream.py", line 129, in process_input
return func(self, previous_state)
File "/usr/local/lib/python3.8/site-packages/h2/stream.py", line 338, in recv_on_closed_stream
raise StreamClosedError(self.stream_id)
h2.exceptions.StreamClosedError: 979

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
calling routine goes here...
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 1055, in get
return self.request(
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 828, in request
return self.send(request, auth=auth, follow_redirects=follow_redirects)
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 915, in send
response = self._send_handling_auth(
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 943, in _send_handling_auth
response = self._send_handling_redirects(
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 980, in _send_handling_redirects
response = self._send_single_request(request)
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 1016, in _send_single_request
response = transport.handle_request(request)
File "/usr/local/lib/python3.8/site-packages/httpx/_transports/default.py", line 231, in handle_request
resp = self._pool.handle_request(req)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/connection_pool.py", line 268, in handle_request
raise exc
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/connection_pool.py", line 251, in handle_request
response = connection.handle_request(request)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/connection.py", line 103, in handle_request
return self._connection.handle_request(request)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 167, in handle_request
self._response_closed(stream_id=stream_id)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 406, in _response_closed
del self._events[stream_id]
KeyError: 979

EXCEPTION #2

Exception in thread Thread-94:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 148, in handle_request
status, headers = self._receive_response(
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 292, in _receive_response
event = self._receive_stream_event(request, stream_id)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 333, in _receive_stream_event
self._receive_events(request, stream_id)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 352, in _receive_events
raise RemoteProtocolError(self._connection_terminated)
httpcore.RemoteProtocolError: <ConnectionTerminated error_code:ErrorCodes.PROTOCOL_ERROR, last_stream_id:7, additional_data:None>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/threading.py", line 932, in _bootstrap_inner
Exception in thread Thread-97:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 148, in handle_request
status, headers = self._receive_response(
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 292, in _receive_response
self.run()
File "/app/lib/streams/m3u8_queue.py", line 81, in run
event = self._receive_stream_event(request, stream_id)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 333, in _receive_stream_event
self._receive_events(request, stream_id)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 352, in _receive_events
raise RemoteProtocolError(self._connection_terminated)
httpcore.RemoteProtocolError: <ConnectionTerminated error_code:ErrorCodes.PROTOCOL_ERROR, last_stream_id:7, additional_data:None>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
calling routine goes here...
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 1055, in get
return self.request(
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 828, in request
resp = self._pool.handle_request(req)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/connection_pool.py", line 268, in handle_request
return self.send(request, auth=auth, follow_redirects=follow_redirects)
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 915, in send
response = self._send_handling_auth(
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 943, in _send_handling_auth
response = self._send_handling_redirects(
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 980, in _send_handling_redirects
response = self._send_single_request(request)
File "/usr/local/lib/python3.8/site-packages/httpx/_client.py", line 1016, in _send_single_request
raise exc
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/connection_pool.py", line 251, in handle_request
response = connection.handle_request(request)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/connection.py", line 103, in handle_request
return self._connection.handle_request(request)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 167, in handle_request
response = transport.handle_request(request)
File "/usr/local/lib/python3.8/site-packages/httpx/_transports/default.py", line 231, in handle_request
resp = self._pool.handle_request(req)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/connection_pool.py", line 268, in handle_request
self._response_closed(stream_id=stream_id)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 406, in _response_closed
del self._events[stream_id]
KeyError: 5
raise exc
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/connection_pool.py", line 251, in handle_request
response = connection.handle_request(request)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/connection.py", line 103, in handle_request
return self._connection.handle_request(request)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 167, in handle_request
self._response_closed(stream_id=stream_id)
File "/usr/local/lib/python3.8/site-packages/httpcore/_sync/http2.py", line 406, in _response_closed
del self._events[stream_id]
KeyError: 3