Telethon: telethon.network.connection.connection: The server closed the connection

[iranpak]

Hi.
Sometimes when i connect to telegram, immediately it gets the below log:
telethon.network.connection.connection: The server closed the connection
and disconnects from telegram. it happens much and not just a few times. after that async.io runs into exception until i restart the service. below is the full log:

[ INFO/2020-01-03 06:34:34,840] telethon.network.mtprotosender: Connecting to 149.154.167.91:443/TcpFull...
[ INFO/2020-01-03 06:34:34,846] telethon.network.mtprotosender: Connection to 149.154.167.91:443/TcpFull complete!
[ INFO/2020-01-03 06:34:34,860] telethon.network.connection.connection: The server closed the connection
[ERROR/2020-01-03 06:34:34,868] asyncio: Exception in callback Task._wakeup(<Task finishe...> result=None>)
handle: <Handle Task._wakeup(<Task finishe...> result=None>)>
Traceback (most recent call last):File "/usr/lib/python3.5/asyncio/events.py", line 125, in _run
 self._callback(*self._args)
File "/usr/lib/python3.5/asyncio/tasks.py", line 307, in _wakeup
self._step()
File "/usr/lib/python3.5/asyncio/tasks.py", line 265, in _step
 if self._fut_waiter.cancel():
File "/usr/lib/python3.5/asyncio/tasks.py", line 214, in cancel
 if self._fut_waiter.cancel():
.
.
.
File "/usr/lib/python3.5/asyncio/tasks.py", line 214, in cancel
 if self._fut_waiter.cancel():
File "/usr/lib/python3.5/asyncio/tasks.py", line 211, in cancel
 if self.done():
File "/usr/lib/python3.5/asyncio/futures.py", line 256, in done
 return self._state != _PENDING
 RecursionError: maximum recursion depth exceeded in comparison

so what should i do to reconnect again while this happen or exit from the service to restart it automaticly?

[Lonami]

You should upgrade your Python installation, since Python 3.5 has this kind of issue.

[HoshiYamazaki]

You should upgrade your Python installation, since Python 3.5 has this kind of issue.

Just curious, what version of python you recommend? I have the similar issue with telethon 1.13 + python3.6, bot disconnect/crashes itself after some time and I need to force restart my bot.

[Lonami]

Any version above 3.5 is fine. Network errors are unavoidable and the library may fail to autoreconnect which is expected. This particular error is a Python 3.5 specific issue. If you believe you see a bug on newer versions, open a new issue.