Error establishing a Redis connection

I usually got this error:

# Error establishing a Redis connection

`read error on connection to 127.0.0.1:6379`

WordPress is unable to establish a connection to Redis. This means that the connection information in your `wp-config.php` file are incorrect, or that the Redis server is not reachable.

* Is the correct Redis host and port set?
* Is the Redis server running?

If you need help, please read the [installation instructions](https://github.com/rhubarbgroup/redis-cache/blob/develop/INSTALL.md).

To disable Redis, delete the `object-cache.php` file in the `/wp-content/` directory.

And when I refresh the browser, it back to normal. Seems, Redis unable to hand much requests and traffic

Please advice.

Thanks

hi did you tried any other plugin like this Redis Object Cache – WordPress plugin | WordPress.org ?

Yes, I am using that plugin and it’s display the above error message

Is it running?
systemctl status redis
How did you install it?

i’ve tested it and it works fine for me.