Solution to the "MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk" error.
This error occurs because by default, RDB Snapshots are enabled in Redis and the last disk write failed. Upon detecting this, Redis throws the following error to alert the user that the writes are not persisting to disk.
MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk
Overwriting the Configuration
To prevent Redis from stopping writes even if they don't persist to disk, simply change the following configuration in the Redis configuration file.
stop-writes-on-bgsave-error noYou can also do this using the Redis CLI.
config set stop-writes-on-bgsave-error noAfter doing this, you can continue using Redis normally. However, this solution is not the most recommended, as we are silencing Redis's disk write error without knowing exactly why it happens!
Redis Logs
The best way to solve the error is to determine why it occurs and provide an appropriate solution. First, you can start by taking a look at Redis logs with the following command.
tail -n 30 /var/log/redis/redis-server.logIf you are running Redis with Docker, you could view the logs of the container.
docker logs redis-container-nameThis will give you a clear picture of what's happening. In some cases, it may be a bad configuration, like the following error, which presents an error writing permissions.
Failed opening the temp RDB file temp-X.rdb (in server root dir /storage) for saving: Permission denied