Redis ERR unknown command 'BZPOPMIN'

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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?

django-channels redis
11 Answers

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
user_115749920
user_134768020

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

user_109428880

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.

user_132204250

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.

user_23516960

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.

user_65773820

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.

user_85853500
user_124242080

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:)

user_104671530

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

user_123760070

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:

  1. start docker desktop

  2. In your terminal type the below command.

    docker run -p 6379:6379 -d redis:5

user_116526610
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