One or more namespaces failed to connect every time

[Soulbadguy54]

Describe the bug
Hello, everybody. I have some issue with connection to server using namespaces (if i use no namespaces everything goes OK)

Here is my code.
This is the main script:

async def main():
    config = load_config(".env")
    pool = await db_connect(config.db.host, config.db.database, config.db.user, config.db.password)
    session: Session = pool()
    match_url_list = await get_non_streamed_matches(session)
    print(match_url_list)

    def get_match_id(url_):
        for part in urlparse(url_).path.split("/"):
            if part.isnumeric():
                return part

    match_id_list = [get_match_id(url) for url in match_url_list]
    for match_id in STREAMED_MATCH_IDS:
        if match_id not in match_id_list:
            STREAMED_MATCH_IDS.remove(match_id)

    for match_id in match_id_list:
        print(f'Проверяю данные по {match_id}')
        if match_id not in STREAMED_MATCH_IDS:
            match_obj = MatchStats(match_id=match_id, pool=pool)
            await match_obj.register_handlers()
            STREAMED_MATCH_IDS.append(match_id)

        print(STREAMED_MATCH_IDS)  # example output: ['2352419']
        namespaces_list = ['/'] + ["/"+match_id_ for match_id_ in STREAMED_MATCH_IDS]
        print(namespaces_list)  # ['/', '/2352419']
        await sio.connect("https://scorebot-lb.hltv.org", transports="websocket", namespaces=namespaces_list)
        print(sio.namespaces)  # cant reach this
        await asyncio.sleep(3)

if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.create_task(main())
    loop.run_forever()

And subscripts:
#1

class MatchStats:

    def __init__(self, pool, match_id):
        self.scoreboard = None
        self.pool = pool
        self.match_id = match_id

    async def on_scoreboard(self, scoreboard):
        self.scoreboard = scoreboard

    async def on_round_end(self, r_data):
        print(self.scoreboard)

    async def connect(self):
        print('connection established, emitting data...')
        await sio.emit("readyForMatch", json.dumps({"listId": int(self.match_id)}), namespace=f"/{self.match_id}")
        print(f'Данные для {self.match_id} отправлены')
        if self.match_id in STREAMED_MATCH_IDS:
            STREAMED_MATCH_IDS.append(self.match_id)

    async def disconnect(self):
        print('disconnected')
        STREAMED_MATCH_IDS.remove(self.match_id)

    async def register_handlers(self):
        namespace = f"/{self.match_id}"
        sio.on("connect", self.connect, namespace=namespace)
        sio.on("disconnect", self.disconnect, namespace=namespace)
        sio.on("Scoreboard", self.on_scoreboard, namespace=namespace)
        sio.on("RoundEnd", self.on_round_end, namespace=namespace)
        print(f'handlers for {self.match_id} registered!')

#2
sio = socketio.AsyncClient(request_timeout=30)

i got such exceptions:

base_events.py [LINE:1738] #ERROR    [2021-10-20 16:08:23,581]  Task exception was never retrieved
future: <Task finished name='Task-14' coro=<AsyncClient._handle_eio_message() done, defined at C:\Users\Fedor\PycharmProjects\odds_scraper\venv\lib\site-packages\socketio\asyncio_client.py:488> exception=JSONDecodeError('Expecting value: line 1 column 1 (char 0)')>
Traceback (most recent call last):
  File "C:\Users\Fedor\PycharmProjects\odds_scraper\venv\lib\site-packages\socketio\asyncio_client.py", line 499, in _handle_eio_message
    pkt = self.packet_class(encoded_packet=data)
  File "C:\Users\Fedor\PycharmProjects\odds_scraper\venv\lib\site-packages\socketio\packet.py", line 40, in __init__
    self.attachment_count = self.decode(encoded_packet) or 0
  File "C:\Users\Fedor\PycharmProjects\odds_scraper\venv\lib\site-packages\socketio\packet.py", line 111, in decode
    self.data = self.json.loads(ep)
  File "C:\Users\Fedor\PycharmProjects\odds_scraper\venv\lib\site-packages\engineio\json.py", line 16, in loads
    return original_loads(*args, **kwargs)
  File "C:\Users\Fedor\AppData\Local\Programs\Python```
\Python39\lib\json\__init__.py", line 359, in loads
    return cls(**kw).decode(s)
  File "C:\Users\Fedor\AppData\Local\Programs\Python\Python39\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Users\Fedor\AppData\Local\Programs\Python\Python39\lib\json\decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
base_events.py [LINE:1738] #ERROR    [2021-10-20 16:08:24,490]  Task exception was never retrieved
future: <Task finished name='Task-1' coro=<main() done, defined at C:\Users\Fedor\PycharmProjects\odds_scraper\live_scraper_tests\live_scraper_test.py:18> exception=ConnectionError('One or more namespaces failed to connect')>
Traceback (most recent call last):
  File "C:\Users\Fedor\PycharmProjects\odds_scraper\live_scraper_tests\live_scraper_test.py", line 45, in main
    await sio.connect("https://scorebot-lb.hltv.org", transports="websocket")
  File "C:\Users\Fedor\PycharmProjects\odds_scraper\venv\lib\site-packages\socketio\asyncio_client.py", line 158, in connect
    raise exceptions.ConnectionError(
socketio.exceptions.ConnectionError: One or more namespaces failed to connect

Process finished with exit code -1

I get it everytime i try to use namespaces. If i delete them everything is allright. I try some different codestyles such use of Classes for namespaces e.t.c. but the problem was the same

[miguelgrinberg]

The most logical explanation is that your server is not accepting some of those namespaces you are connecting to. You may want to enable logs to see better what's going on. See the troubleshooting section of the docs for help with this.