took too long to shut down and was killed error

[belongwqz]

OS: windowns7
django:3.1.8
channels:2.4.0
daphne:2.5.0
asgiref:3.2.10
channels_redis:3.1.0

I flow the channels doc from https://channels.readthedocs.io/ to create a django project with channels.
The I run python manage.py runserver, and I visit http://localhost:8000 use chrome 90.
The console print some error like:
Application instance <Task pending name='Task-8' coro=<AsgiHandler.__call__() running at D:\Python38\lib\site-packages\channels\http.py:192> wait_for=<Future pending cb=[_chain_future.<locals>._call_check_cancel() at D:\Python38\lib\asyncio\futures.py:360, <TaskWakeupMethWrapper object at 0x000000002B20F100>()]>> for connection <WebRequest at 0x2b4b2700 method=GET uri=/ clientproto=HTTP/1.1> took too long to shut down and was killed.

And the chrome can not open the address http://localhost:8000, what I should do to find the hang reason?

[youssef-elmasry-lenme]

I've similar issue, did you get a solution for this ? @belongwqz

[belongwqz]

I've similar issue, did you get a solution for this ? @belongwqz

Not yet, I just rollback to the old version.

[carltongibson]

Duplicate of #1119

[destelio]

have you tried used the WebSocket reconnect library?

sources:
https://github.com/joewalnes/reconnecting-websocket
https://www.npmjs.com/package/reconnecting-websocket

you need to add this to your html:

<script src='https://cdnjs.cloudflare.com/ajax/libs/reconnecting-websocket/1.0.0/reconnecting-websocket.js'
></script>

and where you call WebSocket in JavaScript switch from WebSocket to ReconnectingWebSocket
var socket = new ReconnectingWebSocket(endpoint)

refresh your browsers where you monitor messages (and incognito)

and it should work, i faced a similar issue... and this solution works for me.

kudos to justin mitchel, @https://github.com/codingforentrepreneurs for figuring this solution out.

[carltongibson]

Hey @destelio — thanks for mentioning that library. It may well be a handy resource to point to...