Redis ERR unknown command 'BZPOPMIN' - redis

Question

I installed Redis version 4.0.9 in a Ubuntu Linux Subsystem on Windows 10 by following these instructions (i.e. sudo apt-get install redis-server).
I am following this tutorial on Django channels, and I ran the following code:
>>> import channels.layers
>>> channel_layer = channels.layers.get_channel_layer()
>>> from asgiref.sync import async_to_sync
>>> async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'})
>>> async_to_sync(channel_layer.receive)('test_channel')
When the last line above is executed, I get this error:
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "C:\Users\xyz\Anaconda3\envs\django\lib\site-packages\asgiref\sync.py", line 120, in __call__
return call_result.result()
File "C:\Users\xyz\Anaconda3\envs\django\lib\concurrent\futures\_base.py", line 425, in result
return self.__get_result()
File "C:\Users\xyz\Anaconda3\envs\django\lib\concurrent\futures\_base.py", line 384, in __get_result
raise self._exception
File "C:\Users\xyz\Anaconda3\envs\django\lib\site-packages\asgiref\sync.py", line 180, in main_wrap
result = await self.awaitable(*args, **kwargs)
File "C:\Users\xyz\Anaconda3\envs\django\lib\site-packages\channels_redis\core.py", line 485, in receive
return (await self.receive_single(channel))[1]
File "C:\Users\xyz\Anaconda3\envs\django\lib\site-packages\channels_redis\core.py", line 508, in receive_single
index, channel_key, timeout=self.brpop_timeout
File "C:\Users\xyz\Anaconda3\envs\django\lib\site-packages\channels_redis\core.py", line 345, in _brpop_with_clean
result = await connection.bzpopmin(channel, timeout=timeout)
aioredis.errors.ReplyError: ERR unknown command 'BZPOPMIN'
On this page, someone suggested using Redis version 5. How do I install Redis version 5 on Windows 10? Any other ideas on how to solve this issue?

Answer 1

I think the problem is in the compatibility with version of the channels-redis package! I had already tested channels some time ago and it worked beautifully with channels-redis version 2.4.2, recently they are in version 3.0.1 and this version doesn't work properly yet I don't know why.
Try install the version 2.4.2 with pip:
pip install channels-redis==2.4.2

Answer 2

Use redis 5.0.9. It worked for for the same error.
Get it from github.com/tporadowski/redis/releases

Answer 3

There is no official support for Redis in Windows OS.
However, Microsoft develops and maintains microsoftarchive/redis. Also it is no longer supported (older versions are availble). I had long search on this about installing version 5 in windows 10. But no luck.
Better you can go for Memurai. Memurai is 100% compatible with the Redis protocol (also supported version 5 too). It is free for development and testing.
EDIT : From Itamar comment, u can also use this as alternative for Memurai

Answer 4

Just download the latest version of Redis for Windows https://github.com/tporadowski/redis/releases from here it will work.
you don't need to downgrade the version of your channels-redis etc. This problem with Redis not with any python packages at all.

Answer 5

You need to install the latest version(6+) of redis:
$ sudo add-apt-repository ppa:redislabs/redis
$ sudo apt-get update
$ sudo apt-get install redis
then restart the redis-server.

Answer 6

This is how i resolve this issue.
Ubuntu 18 installs redis 4 but ubuntu 20 installs redis 5. You can find your redis version by typing redis-cli -v. So i uninstall ubuntu 18 from my windows subsystem for linux (WSL) and reinstall ubuntu 20. It worked just fine.

Answer 7

Same problem on Ubuntu 16.04
Similarly, I was following the chat application tutorial on Django Channels website and had the same error:
aioredis.errors.ReplyError: ERR unknown command 'BZPOPMIN'
The problem occurred when I used these versions:
redis-server==3.0.6
channels==3.0.3
channels-redis==3.2.0
Thanks to #marvin-correia for his answer I figured out the problem's reason is the version of the channels-redis package! So as he suggested, I installed channel-redis version 2.4.2 and the error has gone.
pip install channels-redis==2.4.2
Also, I've to note that channels package downgraded to channels==2.4.0 automatically.

Answer 8

Problem is with the version.
Try older one
I found "2,3,4" any version with it stable and properly working.
https://github.com/tporadowski/redis/releases

Answer 9

To add to #Marvin answer, for me it was similar (some versioning problem probably), I reinstalled django_channels and django to the exact version as specified in the tutorial (3.0, 2.2) and it worked. Not sure what exactly worked but recommend checking it:)

Answer 10

I will also confirm Marvins answer. Hopefully this will help someone out but also leaving this here for notes.
Development:
(this setup works) considering data is sent to and form http://localhost:8000
Setup
Windows 10 Running WSL with Ubuntu 20.04
Python==3.10
Django==4.0
Redis==5.0.7
channels-redis==3.3.1
Production
setup
Python==3.8
Ubuntu==16.04
Redis-server==3.0.6
chanels-redis==2.4.2
channels==3.0.3
When I downgraded, channels-redis, it automcatically downgraded channels as well. Then you can force the upgrade to channels==3.0.3, but it will raise an incompatibility error. Also, if 2 files will most likely to be updated to run Django 4.0
1 being here
https://github.com/django/channels/issues/1609

Answer 11

I was getting this error on a Windows machine, I would suggest you to use Redis on a docker image instead of using Redis server on a windows machine.
One of the way to run a redis server via a docker image and map the port 6379 is to:
start docker desktop
In your terminal type the below command.
docker run -p 6379:6379 -d redis:5