Unknown error in HTTP implementation: RuntimeError('Event loop is closed')

[formulatimer]

Hi,

I run:

_thread = threading.Thread(target=asyncio.run, args=(send_telegram(selected_values[ID], context, query),))
_thread.start()

once the thread is completed I type /start and I am receiving th following error:

2024-02-03 10:40:31,604 - telegram.ext.Application - ERROR - No error handlers are registered, logging exception.
Traceback (most recent call last):
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_async\http11.py", line 92, in handle_async_request
    await self._send_request_headers(**kwargs)
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_async\http11.py", line 147, in _send_request_headers
    await self._send_event(event, timeout=timeout)
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_async\http11.py", line 165, in _send_event
    await self._network_stream.write(bytes_to_send, timeout=timeout)
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_backends\anyio.py", line 51, in write
    await self._stream.send(item=buffer)
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\anyio\streams\tls.py", line 212, in send
    await self._call_sslobject_method(self._ssl_object.write, item)
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\anyio\streams\tls.py", line 178, in _call_sslobject_method
    await self.transport_stream.send(self._write_bio.read())
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\anyio\_backends\_asyncio.py", line 1158, in send
    self._transport.write(item)
  File "C:\Users\MM\AppData\Local\Programs\Python\Python312\Lib\asyncio\proactor_events.py", line 366, in write
    self._loop_writing(data=bytes(data))
  File "C:\Users\MM\AppData\Local\Programs\Python\Python312\Lib\asyncio\proactor_events.py", line 402, in _loop_writing
    self._write_fut = self._loop._proactor.send(self._sock, data)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'send'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\request\_baserequest.py", line 330, in _request_wrapper
    code, payload = await self.do_request(
                    ^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\request\_httpxrequest.py", line 268, in do_request
    res = await self._client.request(
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpx\_client.py", line 1530, in request
    return await self.send(request, auth=auth, follow_redirects=follow_redirects)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpx\_client.py", line 1617, in send
    response = await self._send_handling_auth(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpx\_client.py", line 1645, in _send_handling_auth
    response = await self._send_handling_redirects(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpx\_client.py", line 1682, in _send_handling_redirects
    response = await self._send_single_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpx\_client.py", line 1719, in _send_single_request
    response = await transport.handle_async_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpx\_transports\default.py", line 366, in handle_async_request
    resp = await self._pool.handle_async_request(req)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_async\connection_pool.py", line 268, in handle_async_request
    raise exc
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_async\connection_pool.py", line 251, in handle_async_request
    response = await connection.handle_async_request(request)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_async\connection.py", line 103, in handle_async_request
    return await self._connection.handle_async_request(request)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_async\http11.py", line 132, in handle_async_request
    await self._response_closed()
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_async\http11.py", line 245, in _response_closed
    await self.aclose()
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_async\http11.py", line 253, in aclose
    await self._network_stream.aclose()
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\httpcore\_backends\anyio.py", line 54, in aclose
    await self._stream.aclose()
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\anyio\streams\tls.py", line 202, in aclose
    await self.transport_stream.aclose()
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\anyio\_backends\_asyncio.py", line 1181, in aclose
    self._transport.close()
  File "C:\Users\MM\AppData\Local\Programs\Python\Python312\Lib\asyncio\proactor_events.py", line 109, in close
    self._loop.call_soon(self._call_connection_lost, None)
  File "C:\Users\MM\AppData\Local\Programs\Python\Python312\Lib\asyncio\base_events.py", line 792, in call_soon
    self._check_closed()
  File "C:\Users\MM\AppData\Local\Programs\Python\Python312\Lib\asyncio\base_events.py", line 539, in _check_closed
    raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed

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

Traceback (most recent call last):
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\ext\_application.py", line 1234, in process_update
    await coroutine
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\ext\_basehandler.py", line 157, in handle_update
    return await self.callback(update, context)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\F1v4.py", line 216, in start
    await update.message.reply_markdown_v2(text='Press start', reply_markup=reply_markup)
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\_message.py", line 1218, in reply_markdown_v2
    return await self.get_bot().send_message(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\ext\_extbot.py", line 2624, in send_message
    return await super().send_message(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\_bot.py", line 525, in decorator
    result = await func(self, *args, **kwargs)  # skipcq: PYL-E1102
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\_bot.py", line 846, in send_message
    return await self._send_message(
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\ext\_extbot.py", line 522, in _send_message
    result = await super()._send_message(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\_bot.py", line 703, in _send_message
    result = await self._post(
             ^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\_bot.py", line 613, in _post
    return await self._do_post(
           ^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\ext\_extbot.py", line 340, in _do_post
    return await super()._do_post(
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\_bot.py", line 641, in _do_post
    return await request.post(
           ^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\request\_baserequest.py", line 200, in post
    result = await self._request_wrapper(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\MM\PycharmProjects\First\.venv\Lib\site-packages\telegram\request\_baserequest.py", line 342, in _request_wrapper
    raise NetworkError(f"Unknown error in HTTP implementation: {exc!r}") from exc
telegram.error.NetworkError: Unknown error in HTTP implementation: RuntimeError('Event loop is closed')

[Poolitzer]

Hi these kinds of errors are a common symptom of mixing asyncio and threading. Before attempting to solve them: Why are trying to use a thread?

[formulatimer]

The function send_telegram generates a photo and sends it to the chat. The generation of the photo takes 15-20s.

I am using a thread because I want that the bot continue receiving an processing requests. If i do not use a thread the bot will be freezed during 15-20s

[formulatimer]

Hi

Here is the MWE: https://hastebin.com/share/fonapekatu.css

line 8: TOKEN = "Insert your token here" must be edited
line 22: time.sleep(15) simulates the function that generates the photo

[Poolitzer]

Yes time.sleep blocks the single thread PTB runs in. That's why one would use ayncio.sleep.

You sure the generation of the photo can't be with an async library?

[formulatimer]

The generation of the photo is using a sync library and there is not an equivalent async function. To solve that I was using threads.

Do you have any other idea?

[Bibo-Joshi]

https://docs.python.org/3.11/library/asyncio-eventloop.html#asyncio.loop.run_in_executor

[formulatimer]

Thanks, it is what I was looking for!