Hi, What is the value of acks set for kafka internal topic __consumer_offsets? I know the default replication factor for __consumer_offsets is 3, and we are using version 0.9.01, and set min.sync.replicas = 2 in our server.properties. We noticed some partitions of __consumer_offsets has ISR with 1, some with 2 or 3.
Thanks, Fang
