ClientConnectorError: Cannot connect to host gateway [Temporary failure in name resolution]

[sea350]

I can't tell if this is a bug, a discord server error, a network error or something I'm doing wrong.
The bot seems to be working fine regardless but I'd rather not have this word vomit in my logs.
I recently updated a couple month old project to the latest version of discord.py and after some adapting to the new stuff I get the following crap in my logs:

Traceback (most recent call last):
File "/home/nevetsu/Documents/Project/main.py", line 1, in
import discord
ModuleNotFoundError: No module named 'discord'
[2022-12-05 11:48:22] [INFO ] discord.client: logging in using static token
[2022-12-05 11:48:23] [INFO ] discord.gateway: Shard ID None has connected to Gateway (Session ID: b4b24317d0d0bbc1d4ad5f347a2f276d).
[2022-12-05 12:33:58] [WARNING ] discord.gateway: Can't keep up, shard ID None websocket is 44.6s behind.
[2022-12-05 12:49:47] [INFO ] discord.gateway: Shard ID None has successfully RESUMED session b4b24317d0d0bbc1d4ad5f347a2f276d.
[2022-12-05 15:15:45] [INFO ] discord.gateway: Shard ID None has successfully RESUMED session b4b24317d0d0bbc1d4ad5f347a2f276d.
[2022-12-05 17:09:42] [INFO ] discord.gateway: Shard ID None has successfully RESUMED session b4b24317d0d0bbc1d4ad5f347a2f276d.

... this repeats several times ...

[2022-12-05 22:51:45] [INFO ] discord.gateway: Shard ID None has successfully RESUMED session b4b24317d0d0bbc1d4ad5f347a2f276d.`

This next bit also repeats several times

[2022-12-06 11:03:04] [ERROR ] discord.client: Attempting a reconnect in 0.62s
Traceback (most recent call last):
File "/home/nevetsu/.local/lib/python3.10/site-packages/aiohttp/connector.py", line 1152, in _create_direct_connection
hosts = await asyncio.shield(host_resolved)
File "/home/nevetsu/.local/lib/python3.10/site-packages/aiohttp/connector.py", line 874, in _resolve_host
addrs = await self._resolver.resolve(host, port, family=self._family)
File "/home/nevetsu/.local/lib/python3.10/site-packages/aiohttp/resolver.py", line 33, in resolve
infos = await self._loop.getaddrinfo(
File "/usr/lib/python3.10/asyncio/base_events.py", line 860, in getaddrinfo
return await self.run_in_executor(
File "/usr/lib/python3.10/concurrent/futures/thread.py", line 58, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/lib/python3.10/socket.py", line 955, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -3] Temporary failure in name resolution

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

Traceback (most recent call last):
File "/home/nevetsu/.local/lib/python3.10/site-packages/discord/client.py", line 624, in connect
self.ws = await asyncio.wait_for(coro, timeout=60.0)
File "/usr/lib/python3.10/asyncio/tasks.py", line 445, in wait_for
return fut.result()
File "/home/nevetsu/.local/lib/python3.10/site-packages/discord/gateway.py", line 372, in from_client
socket = await client.http.ws_connect(str(url))
File "/home/nevetsu/.local/lib/python3.10/site-packages/discord/http.py", line 536, in ws_connect
return await self.__session.ws_connect(url, **kwargs)
File "/home/nevetsu/.local/lib/python3.10/site-packages/aiohttp/client.py", line 779, in _ws_connect
resp = await self.request(
File "/home/nevetsu/.local/lib/python3.10/site-packages/aiohttp/client.py", line 536, in _request
conn = await self._connector.connect(
File "/home/nevetsu/.local/lib/python3.10/site-packages/aiohttp/connector.py", line 540, in connect
proto = await self._create_connection(req, traces, timeout)
File "/home/nevetsu/.local/lib/python3.10/site-packages/aiohttp/connector.py", line 901, in _create_connection
_, proto = await self._create_direct_connection(req, traces, timeout)
File "/home/nevetsu/.local/lib/python3.10/site-packages/aiohttp/connector.py", line 1166, in _create_direct_connection
raise ClientConnectorError(req.connection_key, exc) from exc
aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host gateway-us-east1-b.discord.gg:443 ssl:default [Temporary failure in name resolution]

and then it goes back to this

[2022-12-06 11:11:03] [INFO ] discord.gateway: Shard ID None session has been invalidated.
[2022-12-06 11:11:09] [INFO ] discord.gateway: Shard ID None has connected to Gateway (Session ID: 3979e7ef3d95837cf8a135a4ccb9dada).
[2022-12-06 11:11:11] [ERROR ] discord.client: Ignoring exception in on_ready
Traceback (most recent call last):
File "/home/nevetsu/.local/lib/python3.10/site-packages/discord/client.py", line 409, in _run_event
await coro(*args, **kwargs)
File "/home/nevetsu/Documents/Project/main.py", line 32, in on_ready
await setup()
File "/home/nevetsu/Documents/Project/main.py", line 27, in setup
await cogs[i].setup(client)
File "/home/nevetsu/Documents/Project/util.py", line 103, in setup
await client.add_cog(util(client))
File "/home/nevetsu/.local/lib/python3.10/site-packages/discord/ext/commands/bot.py", line 776, in add_cog
raise discord.ClientException(f'Cog named {cog_name!r} already loaded')
discord.errors.ClientException: Cog named 'util' already loaded
[2022-12-06 11:58:06] [INFO ] discord.gateway: Shard ID None has successfully RESUMED session 3979e7ef3d95837cf8a135a4ccb9dada.
[2022-12-06 12:08:13] [INFO ] discord.gateway: Shard ID None has successfully RESUMED session 3979e7ef3d95837cf8a135a4ccb9dada.

the RESUMED bit keeps repeating again

[LostLuma]

Hello, an application resuming repeatedly should generally be expected nowadays, as Discord asks every app connected to the gateway to do so every couple hours. If the logs annoy you you may want to set a different log level for the discord or discord.gateway logger:

logging.getLogger('discord.gateway').setLevel(logging.WARNING)

The name resolution error is however on your side, and you can try to remedy it by either changing your DNS servers, or adding additional ones in case your primary ones fail to return a result as they did in this case. How this is done varies by operating system, you can find instructions on popular DNS provider's websites such as Cloudflare's public DNS or Google's public DNS. For redundancy sake you may also specify multiple of these.

[modernNeo]

as Discord asks every app connected to the gateway to do so every couple hours.

I'm curious why that is? Is this discord doing [for lack of a better word] some sort of cache refreshing or something else?

[IAmTomahawkx]

Load balancing on their servers

[modernNeo]

can you be more specific how re-connecting to the gateway helps with load-balancing?

[Rinume-chan]

To shift some of the load to another server, they need to disconnect you from the current one and reconnect you on the new one.

[modernNeo]

oh. TIL thanks