问题
I come across this phrase from https://niqdev.github.io/devops/kafka/ and https://livebook.manning.com/book/kafka-streams-in-action/chapter-2/109 (Kafka Streams in Action )
The controller broker is responsible for setting up leader/follower relationships for all partitions of a topic. If a Kafka node dies or is unresponsive (to ZooKeeper heartbeats), all of its assigned partitions (both leader and follower) are reassigned by the controller broker.
I think it is not correct assignment of follower partitions to other brokers - as the partitions wont heal themselves unless the broker comes back . I know it ONLY happens for leader replica where if the broker that has leader replica gone down, one of the broker that contains follower will become leader. But, I dont think "reassigment" of followers will happen automatically unless reassignment is initiated manually. Please add your inputs
回答1:
The terminology might be a little off indeed but still applies. Followers are not necessarily assigned to other brokers but they need to change the endpoint to where they are going to send fetch requests. The follower's job is to stay in-sync with the leader, and if the leader has been assigned to a new broker because the old one failed then the followers need to send their fetch requests to the new elected broker. I think that is what reassignment means in the context that you shared.
来源：https://stackoverflow.com/questions/63012732/kafka-controller-broker