Fatal error handling updates (this is a bug in Telethon, please report it)

[simbadmorehod]

ERROR:telethon.client.updates:Fatal error handling updates (this is a bug in Telethon, please report it)
 Traceback (most recent call last):
   File "/home/donald/donald_project/donald/venv/lib/python3.8/site-packages/telethon/client/updates.py", line 282, in _update_loop
     diff = await self(get_diff)
   File "/home/donald/donald_project/donald/venv/lib/python3.8/site-packages/telethon/client/users.py", line 30, in __call__
     return await self._call(self._sender, request, ordered=ordered)
  File "/home/donald/donald_project/donald/venv/lib/python3.8/site-packages/telethon/client/users.py", line 84, in _call
     result = await future
telethon.errors.rpcerrorlist.DateEmptyError: Date empty (caused by GetDifferenceRequest)

[Lonami]

Please follow the issue template. It makes it easier for me to make sure everything is in order.

Please install master with:

pip3 install -U https://github.com/LonamiWebs/Telethon/archive/v1.zip

and configure logging with something like this:

import logging
logging.basicConfig(format='[%(levelname) 5s/%(asctime)s] %(name)s: %(message)s', level=logging.WARNING)
logging.getLogger('telethon.messagebox').setLevel(logging.NOTSET + 1)

(You can configure it to your liking, but the messagebox level must be as low as possible. If you have multiple TelegramClient, please set a different base_logger='name' for each in their constructor).

This will print all updates being processed along with the current state of the MessageBox (which deals with the updates).

This log will contain sensitive information, so only share it with people you trust (or redact it before sharing it). You can send it to me privately so that I and nobody else can analyze it (please link to this issue, so I know you're not spam).

With it I'll be able to reproduce the issue reliably locally, pinpoint the problem, and fix it.

[simbadmorehod]

The task will not be easy, but I will try to do everything you ask.

[simbadmorehod]

I can install in the main bot startup file:

import logging
logging.basicConfig(format='[%(levelname) 5s/%(asctime)s] %(name)s: %(message)s', level=logging.WARNING)
logging.getLogger('telethon.messagebox').setLevel(logging.NOTSET + 1)

Then I have a piece of code where I run several different clients TelegramClient apparently there I should set base_logger='name' argument when creating a client?

[Lonami]

Yes. If you use multiple TelegramClient instances, each one of them needs their own base_logger name. Otherwise, the logs will be interleaved and I won't be able to correctly reproduce the issue.

[simbadmorehod]

Okay, I will create a name as the id of the user that uses this client.

[Lonami]

Closing as a duplicate of #3974. Please continue discussion there if needed.

[omkarsing6458]

telethon.client.updates: Fatal error handling updates (this is a bug in Telethon v1.28.5, please report it)

Please help me 🙏