e90e091b_Apache_Kafka__Description
[Property] offsets.topic.replication.factor [Default] 3 [Description] 
The replication factor for the offset commit topic. A higher setting (e.g., three or four) is recommended in order to ensure higher availability. If the offsets topic is created when fewer brokers than the replication factor then the offsets topic will be created with fewer replicas.
Apache Kafka
Description