Serverless AWS Redis results in `redis.exceptions.ResponseError: Lua scripts without any input keys are not supported.` about channels_redis

[carltongibson]

Grrr. There's not going to be anything we can do about this.

The PubSub channel layer doesn't use Lua so you could try that.

[root4417]

I'm using the ServerLess Redis Cache from ElastiCache AWS and getting the error.

Exception inside application: Lua scripts without any input keys are not supported.
Traceback (most recent call last):
File "/usr/local/lib/python3.10/site-packages/channels/routing.py", line 62, in call
return await application(scope, receive, send)
File "/usr/local/lib/python3.10/site-packages/channels/routing.py", line 62, in call
return await application(scope, receive, send)
File "/usr/local/lib/python3.10/site-packages/channels/sessions.py", line 47, in call
return await self.inner(dict(scope, cookies=cookies), receive, send)
File "/usr/local/lib/python3.10/site-packages/channels/sessions.py", line 263, in call
return await self.inner(wrapper.scope, receive, wrapper.send)
File "/usr/local/lib/python3.10/site-packages/channels/auth.py", line 185, in call
return await super().call(scope, receive, send)
File "/usr/local/lib/python3.10/site-packages/channels/middleware.py", line 24, in call
return await self.inner(scope, receive, send)
File "/usr/local/lib/python3.10/site-packages/channels/routing.py", line 116, in call
return await application(
File "/usr/local/lib/python3.10/site-packages/channels/consumer.py", line 94, in app
return await consumer(scope, receive, send)
File "/usr/local/lib/python3.10/site-packages/channels/consumer.py", line 58, in call
await await_many_dispatch(
File "/usr/local/lib/python3.10/site-packages/channels/utils.py", line 57, in await_many_dispatch
await task
redis.exceptions.ResponseError: Lua scripts without any input keys are not supported.

Here is the config:

CHANNEL_LAYERS = {
    'default': {
        'BACKEND': 'channels_redis.core.RedisChannelLayer',
        'CONFIG': {
            'hosts': [{
                "address": REDIS_HOST,  # "REDIS_TLS_URL"
                "ssl_cert_reqs": None,
            }],
            'expiry': 360,

        },
    },
}

.env redis host:

REDIS_HOST=rediss://<>.serverless.euw2.cache.amazonaws.com:6379