MISCONF Redis is configured to save RDB snapshots

When installing with brew the logfile is set to stdout. You need to edit /usr/local/etc/redis.conf and change logfile to something else. I set mine to:

logfile /var/log/redis-server.log

You'll also make sure the user that runs redis has write permissions to the logfile, or redis will simply fail to launch completely. Then just restart redis:

brew services restart redis

After restarting it'll take a while for the error to show up in the logs, because it happens after redis fails its timed flushes. You should be seeing something like:

[7051] 29 Dec 02:37:47.164 # Background saving error
[7051] 29 Dec 02:37:53.009 * 10 changes in 300 seconds. Saving...
[7051] 29 Dec 02:37:53.010 * Background saving started by pid 7274
[7274] 29 Dec 02:37:53.010 # Failed opening .rdb for saving: Permission denied

After a brew install it attempts to save to /usr/local/var/db/redis/ and since redis is probably running as your current user and not root, it can't write to it. Once redis has permission to write to the directory, your logfile will say:

[7051] 29 Dec 03:08:59.098 * 1 changes in 900 seconds. Saving...
[7051] 29 Dec 03:08:59.098 * Background saving started by pid 8833
[8833] 29 Dec 03:08:59.099 * DB saved on disk
[7051] 29 Dec 03:08:59.200 * Background saving terminated with success

and the stop-writes-on-bgsave-error error will no longer get raised.

I solved the problem by executing following commands:

$ redis-cli
> config set stop-writes-on-bgsave-error no