Troubleshooting Redis's inability to write after saving a snapshot

The following error message appears when you use the command line tool to connect and then execute "set test 0":

Misconf Redis is configured to save the RDB snapshots, but was currently not able to persist on disk. Commands that may modify the data set is disabled. Please check your Redis logs for details about the error.

This should be caused by a previous forced stop of Redis snapshots, which is confirmed by viewing the Redis snapshot status:

Redis 127.0.0.1:6379> Info
...
Rdb_last_bgsave_status:err ...

Resolve the issue by closing the configuration item Stop-writes-on-bgsave-error.

Redis 127.0.0.1:6379> Config set Stop-writes-on-bgsave-error no