title: How to monitor replication progress for a Kafka topic
body: <p>I have a Kafka topic that somehow went from 3 ISRs to 1 ISR, in a kafka cluster with 3 brokers. I changed minimum ISR from 2 to 1 to allow it to function. Presumably the other brokers are trying to replicate the topic from the leader, how can I monitor their progress?</p>