(error) MISCONF Redis is configured to save RDB snapshots

使用redis进行set值时出现如下问题：

127.0.0.1:6379> set a 1
(error) MISCONF Redis is configured to save RDB snapshots, 
but it is currently not able to persist on disk. Commands that may 
modify the data set are disabled, because this instance is configured 
to report errors during writes if RDB snapshotting fails (stop-writes-
on-bgsave-error option). Please check the Redis logs for details about
 the RDB error.

redis快照被强制关闭了导致不能持久化的问题，可通过修改stop-writes-on-bgsave-error的值来解决此问题。

127.0.0.1:6379> config set stop-writes-on-bgsave-error no
OK
127.0.0.1:6379> set a 1
OK