Redis v3.0.501 (Windows)
My log contains the following errors, repeated on every period:
2016-08-01T14:56:42-04:00 ERR Key does not exist in in data: gcc_version 2016-08-01T14:56:42-04:00 ERR Key does not exist in in data: config_file
These correspond to expected Redis INFO properties, but those particular properties do not exist in my (Windows) version of Redis. Metricbeat ends up sending this to its output:
"config_file": "", "gcc_version": "",
I might suggest dropping the Redis module's "Key does not exist" log message to a WARN or INFO.