ClientConnectorError: Cannot connect to host api.telegram.org:443 ssl:default Connect call failed

Context

Please provide any relevant information about your setup. This is important in case the issue is not reproducible except for under certain conditions.

• Operating System: Ubuntu 20.04.3 LTS (Focal Fossa)
• Python Version: 3.8
• aiogram version: 2.18
• aiohttp version: 3.8.1
• uvloop version (if installed):

Current Behavior

After bot start:

Cause exception while getting updates.
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/aiohttp/connector.py", line 986, in _wrap_create_connection
    return await self._loop.create_connection(*args, **kwargs)  # type: ignore[return-value]  # noqa
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 1025, in create_connection
    raise exceptions[0]
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 1010, in create_connection
    sock = await self._connect_sock(
  File "/usr/local/lib/python3.8/asyncio/base_events.py", line 924, in _connect_sock
    await self.sock_connect(sock, address)
  File "/usr/local/lib/python3.8/asyncio/selector_events.py", line 496, in sock_connect
    return await fut
  File "/usr/local/lib/python3.8/asyncio/selector_events.py", line 528, in _sock_connect_cb
    raise OSError(err, f'Connect call failed {address}')
TimeoutError: [Errno 110] Connect call failed ('149.154.167.220', 443)

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

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/aiogram/bot/api.py", line 139, in make_request
    async with session.post(url, data=req, **kwargs) as response:
  File "/usr/local/lib/python3.8/site-packages/aiohttp/client.py", line 1138, in __aenter__
    self._resp = await self._coro
  File "/usr/local/lib/python3.8/site-packages/aiohttp/client.py", line 535, in _request
    conn = await self._connector.connect(
  File "/usr/local/lib/python3.8/site-packages/aiohttp/connector.py", line 542, in connect
    proto = await self._create_connection(req, traces, timeout)
  File "/usr/local/lib/python3.8/site-packages/aiohttp/connector.py", line 907, in _create_connection
    _, proto = await self._create_direct_connection(req, traces, timeout)
  File "/usr/local/lib/python3.8/site-packages/aiohttp/connector.py", line 1206, in _create_direct_connection
    raise last_exc
  File "/usr/local/lib/python3.8/site-packages/aiohttp/connector.py", line 1175, in _create_direct_connection
    transp, proto = await self._wrap_create_connection(
  File "/usr/local/lib/python3.8/site-packages/aiohttp/connector.py", line 992, in _wrap_create_connection
    raise client_error(req.connection_key, exc) from exc
aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host api.telegram.org:443 ssl:default [Connect call failed ('149.154.167.220', 443)]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/aiogram/dispatcher/dispatcher.py", line 381, in start_polling
    updates = await self.bot.get_updates(
  File "/usr/local/lib/python3.8/site-packages/aiogram/bot/bot.py", line 110, in get_updates
    result = await self.request(api.Methods.GET_UPDATES, payload)
  File "/usr/local/lib/python3.8/site-packages/aiogram/bot/base.py", line 231, in request
    return await api.make_request(await self.get_session(), self.server, self.__token, method, data, files,
  File "/usr/local/lib/python3.8/site-packages/aiogram/bot/api.py", line 142, in make_request
    raise exceptions.NetworkError(f"aiohttp client throws an error: {e.__class__.__name__}: {e}")
aiogram.utils.exceptions.NetworkError: Aiohttp client throws an error: ClientConnectorError: Cannot connect to host api.telegram.org:443 ssl:default [Connect call failed ('149.154.167.220', 443)]

[losimen]

The problem is that time on your host machine is different from world time. I have noticed that Google Cloud compute engine doesn’t have any time synchronization services. That explains why the bot works well for two days, and then he starts catching tracebacks.

[alexvas96]

Yes, it’s ok now. After that time this problem didn’t happen.