[QUESTION]httpx.RemoteProtocolError: Server disconnected without sending a response.

[shadu120]

Issue I am facing

I'm writing a very simple bot app.
The only difference is I'm using HTTP proxy.

Here is my code:

#!/usr/bin/python
#coding: utf-8

TOKEN = "***:***"
PROXY="http://127.0.0.1:3128"

from telegram import Update
from telegram.ext import ApplicationBuilder, ContextTypes, CommandHandler,MessageHandler, filters
from telegram.error import NetworkError

import logging
logging.basicConfig(
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
    level=logging.INFO
)
logger = logging.getLogger(__name__)


async def start(update: Update, context: ContextTypes.context):
    logger.info(msg="Start():")
    await context.bot.send_message(chat_id=update.effective_chat.id, text="yes!")

async def error_handler(update: Update, context: ContextTypes.context):
    logger.error(msg=">>>>>>>>>>>", exc_info=context.error)


if __name__ == '__main__':

    #application = ApplicationBuilder().token(TOKEN).build()
    application = ApplicationBuilder().token(TOKEN).proxy_url(PROXY).build()
    start_handler = CommandHandler('start', start)
    application.add_handler(start_handler)

    application.add_error_handler(error_handler)
    application.run_polling()
    

This application got network errors every 15 seconds.

The main error message is :telegram.error.NetworkError: httpx HTTPError: Server disconnected without sending a response.

Even though, this app can process the update messages got from user. When user send /start to tgbot, it responses correctly.

Traceback to the issue

2023-01-09 19:16:06,939 - apscheduler.scheduler - INFO - Scheduler started
2023-01-09 19:16:06,939 - telegram.ext._application - INFO - Application started
2023-01-09 19:16:27,739 - telegram.ext._updater - ERROR - Error while getting Updates: httpx HTTPError: Server disconnected without sending a response.
2023-01-09 19:16:27,739 - __main__ - ERROR - >>>>>>>>>>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 60, in map_httpcore_exceptions
    yield
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 353, in handle_async_request
    resp = await self._pool.handle_async_request(req)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection_pool.py", line 253, in handle_async_request
    raise exc
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection_pool.py", line 237, in handle_async_request
    response = await connection.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection.py", line 90, in handle_async_request
    return await self._connection.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 112, in handle_async_request
    raise exc
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 91, in handle_async_request
    ) = await self._receive_response_headers(**kwargs)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 155, in _receive_response_headers
    event = await self._receive_event(timeout=timeout)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 205, 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/python3.10/site-packages/telegram/request/_httpxrequest.py", line 183, in do_request
    res = await self._client.request(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1533, in request
    return await self.send(request, auth=auth, follow_redirects=follow_redirects)
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1620, in send
    response = await self._send_handling_auth(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1648, in _send_handling_auth
    response = await self._send_handling_redirects(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1685, in _send_handling_redirects
    response = await self._send_single_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1722, in _send_single_request
    response = await transport.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 352, in handle_async_request
    with map_httpcore_exceptions():
  File "/usr/local/Cellar/python@3.10/3.10.6_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/contextlib.py", line 153, in __exit__
    self.gen.throw(typ, value, traceback)
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 77, 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/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 600, in _network_loop_retry
    if not await action_cb():
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 327, in polling_action_cb
    raise exc
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 312, in polling_action_cb
    updates = await self.bot.get_updates(
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_extbot.py", line 524, in get_updates
    updates = await super().get_updates(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 334, in decorator
    result = await func(*args, **kwargs)  # skipcq: PYL-E1102
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 3584, in get_updates
    await self._post(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 422, in _post
    return await self._do_post(
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_extbot.py", line 306, in _do_post
    return await super()._do_post(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 453, in _do_post
    return await request.post(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 165, in post
    result = await self._request_wrapper(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 288, in _request_wrapper
    raise exc
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 274, in _request_wrapper
    code, payload = await self.do_request(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_httpxrequest.py", line 204, in do_request
    raise NetworkError(f"httpx HTTPError: {err}") from err
telegram.error.NetworkError: httpx HTTPError: Server disconnected without sending a response.
2023-01-09 19:16:39,501 - telegram.ext._updater - ERROR - Error while getting Updates: httpx HTTPError: Server disconnected without sending a response.
2023-01-09 19:16:39,501 - __main__ - ERROR - >>>>>>>>>>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 60, in map_httpcore_exceptions
    yield
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 353, in handle_async_request
    resp = await self._pool.handle_async_request(req)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection_pool.py", line 253, in handle_async_request
    raise exc
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection_pool.py", line 237, in handle_async_request
    response = await connection.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection.py", line 90, in handle_async_request
    return await self._connection.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 112, in handle_async_request
    raise exc
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 91, in handle_async_request
    ) = await self._receive_response_headers(**kwargs)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 155, in _receive_response_headers
    event = await self._receive_event(timeout=timeout)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 205, 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/python3.10/site-packages/telegram/request/_httpxrequest.py", line 183, in do_request
    res = await self._client.request(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1533, in request
    return await self.send(request, auth=auth, follow_redirects=follow_redirects)
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1620, in send
    response = await self._send_handling_auth(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1648, in _send_handling_auth
    response = await self._send_handling_redirects(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1685, in _send_handling_redirects
    response = await self._send_single_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1722, in _send_single_request
    response = await transport.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 352, in handle_async_request
    with map_httpcore_exceptions():
  File "/usr/local/Cellar/python@3.10/3.10.6_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/contextlib.py", line 153, in __exit__
    self.gen.throw(typ, value, traceback)
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 77, 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/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 600, in _network_loop_retry
    if not await action_cb():
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 327, in polling_action_cb
    raise exc
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 312, in polling_action_cb
    updates = await self.bot.get_updates(
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_extbot.py", line 524, in get_updates
    updates = await super().get_updates(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 334, in decorator
    result = await func(*args, **kwargs)  # skipcq: PYL-E1102
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 3584, in get_updates
    await self._post(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 422, in _post
    return await self._do_post(
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_extbot.py", line 306, in _do_post
    return await super()._do_post(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 453, in _do_post
    return await request.post(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 165, in post
    result = await self._request_wrapper(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 288, in _request_wrapper
    raise exc
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 274, in _request_wrapper
    code, payload = await self.do_request(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_httpxrequest.py", line 204, in do_request
    raise NetworkError(f"httpx HTTPError: {err}") from err
telegram.error.NetworkError: httpx HTTPError: Server disconnected without sending a response.
2023-01-09 19:16:51,741 - telegram.ext._updater - ERROR - Error while getting Updates: httpx HTTPError: Server disconnected without sending a response.
2023-01-09 19:16:51,741 - __main__ - ERROR - >>>>>>>>>>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 60, in map_httpcore_exceptions
    yield
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 353, in handle_async_request
    resp = await self._pool.handle_async_request(req)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection_pool.py", line 253, in handle_async_request
    raise exc
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection_pool.py", line 237, in handle_async_request
    response = await connection.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection.py", line 90, in handle_async_request
    return await self._connection.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 112, in handle_async_request
    raise exc
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 91, in handle_async_request
    ) = await self._receive_response_headers(**kwargs)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 155, in _receive_response_headers
    event = await self._receive_event(timeout=timeout)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 205, 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/python3.10/site-packages/telegram/request/_httpxrequest.py", line 183, in do_request
    res = await self._client.request(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1533, in request
    return await self.send(request, auth=auth, follow_redirects=follow_redirects)
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1620, in send
    response = await self._send_handling_auth(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1648, in _send_handling_auth
    response = await self._send_handling_redirects(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1685, in _send_handling_redirects
    response = await self._send_single_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1722, in _send_single_request
    response = await transport.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 352, in handle_async_request
    with map_httpcore_exceptions():
  File "/usr/local/Cellar/python@3.10/3.10.6_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/contextlib.py", line 153, in __exit__
    self.gen.throw(typ, value, traceback)
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 77, 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/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 600, in _network_loop_retry
    if not await action_cb():
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 327, in polling_action_cb
    raise exc
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 312, in polling_action_cb
    updates = await self.bot.get_updates(
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_extbot.py", line 524, in get_updates
    updates = await super().get_updates(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 334, in decorator
    result = await func(*args, **kwargs)  # skipcq: PYL-E1102
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 3584, in get_updates
    await self._post(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 422, in _post
    return await self._do_post(
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_extbot.py", line 306, in _do_post
    return await super()._do_post(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 453, in _do_post
    return await request.post(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 165, in post
    result = await self._request_wrapper(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 288, in _request_wrapper
    raise exc
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 274, in _request_wrapper
    code, payload = await self.do_request(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_httpxrequest.py", line 204, in do_request
    raise NetworkError(f"httpx HTTPError: {err}") from err
telegram.error.NetworkError: httpx HTTPError: Server disconnected without sending a response.
2023-01-09 19:17:04,708 - telegram.ext._updater - ERROR - Error while getting Updates: httpx HTTPError: Server disconnected without sending a response.
2023-01-09 19:17:04,708 - __main__ - ERROR - >>>>>>>>>>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 60, in map_httpcore_exceptions
    yield
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 353, in handle_async_request
    resp = await self._pool.handle_async_request(req)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection_pool.py", line 253, in handle_async_request
    raise exc
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection_pool.py", line 237, in handle_async_request
    response = await connection.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/connection.py", line 90, in handle_async_request
    return await self._connection.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 112, in handle_async_request
    raise exc
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 91, in handle_async_request
    ) = await self._receive_response_headers(**kwargs)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 155, in _receive_response_headers
    event = await self._receive_event(timeout=timeout)
  File "/usr/local/lib/python3.10/site-packages/httpcore/_async/http11.py", line 205, 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/python3.10/site-packages/telegram/request/_httpxrequest.py", line 183, in do_request
    res = await self._client.request(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1533, in request
    return await self.send(request, auth=auth, follow_redirects=follow_redirects)
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1620, in send
    response = await self._send_handling_auth(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1648, in _send_handling_auth
    response = await self._send_handling_redirects(
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1685, in _send_handling_redirects
    response = await self._send_single_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpx/_client.py", line 1722, in _send_single_request
    response = await transport.handle_async_request(request)
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 352, in handle_async_request
    with map_httpcore_exceptions():
  File "/usr/local/Cellar/python@3.10/3.10.6_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/contextlib.py", line 153, in __exit__
    self.gen.throw(typ, value, traceback)
  File "/usr/local/lib/python3.10/site-packages/httpx/_transports/default.py", line 77, 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/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 600, in _network_loop_retry
    if not await action_cb():
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 327, in polling_action_cb
    raise exc
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_updater.py", line 312, in polling_action_cb
    updates = await self.bot.get_updates(
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_extbot.py", line 524, in get_updates
    updates = await super().get_updates(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 334, in decorator
    result = await func(*args, **kwargs)  # skipcq: PYL-E1102
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 3584, in get_updates
    await self._post(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 422, in _post
    return await self._do_post(
  File "/usr/local/lib/python3.10/site-packages/telegram/ext/_extbot.py", line 306, in _do_post
    return await super()._do_post(
  File "/usr/local/lib/python3.10/site-packages/telegram/_bot.py", line 453, in _do_post
    return await request.post(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 165, in post
    result = await self._request_wrapper(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 288, in _request_wrapper
    raise exc
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_baserequest.py", line 274, in _request_wrapper
    code, payload = await self.do_request(
  File "/usr/local/lib/python3.10/site-packages/telegram/request/_httpxrequest.py", line 204, in do_request
    raise NetworkError(f"httpx HTTPError: {err}") from err
telegram.error.NetworkError: httpx HTTPError: Server disconnected without sending a response.

Related part of your code

No response

Operating System

macOS Monterey 12.6.2

Version of Python, python-telegram-bot & dependencies

python3 -m telegram
python-telegram-bot 20.0
Bot API 6.4
Python 3.10.6 (main, Aug 11 2022, 13:49:25) [Clang 13.1.6 (clang-1316.0.21.2.5)]

python3 -V
Python 3.10.6

[shadu120]

After I check the proxy, I found the reason,

I used gost to create a HTTP proxy. But there was some bugs. gost server response EOF error message, which disruppted the the proxy.

I will sumibit issue to project gost.

Thanks.