failed to refresh slots cache redis - CLUSTER INFO | Docs online slot 888

Redis Cluster was released on April 1st, 2015. Since then Redis Cluster is the preferred way to get automatic sharding and high availability.

This output will send events to a Redis queue using RPUSH. The RPUSH command is supported in Redis v0.0.7+. Using PUBLISH to a channel requires at least v1.3.8+.

Redis is an open-source in-memory datastore used as a database or cache. It has some built-in features and tools that make this an interesting product.