MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redis logs for details about the error.
解决方案:
Just too brief about answer. open terminal and type following commands
redis-cli
and now type
config set stop-writes-on-bgsave-error no
http://stackoverflow.com/questions/19581059/misconf-redis-is-configured-to-save-rdb-snapshots