What will happen if the broker is restarted?

You have a Kafka cluster and all the topics have a replication factor of 3. One intern at your company stopped a broker, and accidentally deleted all the data of that broker on the disk .

What will happen if the broker is restarted?
A . The broker will start, and other topics will also be deleted as the broker data on the disk got deleted
B . The broker will start, and won’t be online until all the data it needs to have is replicated from other leaders
C . The broker will crash
D . The broker will start, and won’t have any data. If the broker comes leader, we have a data loss

Answer: B

Explanation:

Kafka replication mechanism makes it resilient to the scenarios where the broker lose data on disk, but can recover from replicating from other brokers. This makes Kafka amazing!