直接停掉192.168.233.133:9092 (broker.id = 5)

查看topic 分区

$ /data/kafka_2.13-3.0.0/bin/kafka-topics.sh --bootstrap-server 192.168.233.132:9092 --topic quickstart77-events --describe
Topic: quickstart77-events	TopicId: A7bNWYseSNqlGfs1XPhN9g	PartitionCount: 6	ReplicationFactor: 2	Configs: segment.bytes=1073741824Topic: quickstart77-events	Partition: 0	Leader: 4	Replicas: 5,4	Isr: 4Topic: quickstart77-events	Partition: 1	Leader: 1	Replicas: 1,2	Isr: 1,2Topic: quickstart77-events	Partition: 2	Leader: 4	Replicas: 4,3	Isr: 4,3Topic: quickstart77-events	Partition: 3	Leader: 2	Replicas: 2,0	Isr: 2,0Topic: quickstart77-events	Partition: 4	Leader: 3	Replicas: 3,5	Isr: 3Topic: quickstart77-events	Partition: 5	Leader: 0	Replicas: 0,1	Isr: 0,1

宕掉的broker已经不在leader和Isr中，Replicas依然还在

恢复192.168.233.133:9092 (broker.id = 5)

$ /data/kafka_2.13-3.0.0/bin/kafka-topics.sh --bootstrap-server 192.168.233.132:9092 --topic quickstart77-events --describe
Topic: quickstart77-events	TopicId: A7bNWYseSNqlGfs1XPhN9g	PartitionCount: 6	ReplicationFactor: 2	Configs: segment.bytes=1073741824Topic: quickstart77-events	Partition: 0	Leader: 4	Replicas: 5,4	Isr: 4,5Topic: quickstart77-events	Partition: 1	Leader: 1	Replicas: 1,2	Isr: 1,2Topic: quickstart77-events	Partition: 2	Leader: 4	Replicas: 4,3	Isr: 4,3Topic: quickstart77-events	Partition: 3	Leader: 2	Replicas: 2,0	Isr: 2,0Topic: quickstart77-events	Partition: 4	Leader: 3	Replicas: 3,5	Isr: 3,5Topic: quickstart77-events	Partition: 5	Leader: 0	Replicas: 0,1	Isr: 0,1

Isr中已经恢复看到了，但是leader中还是没有

再过一段时间再观察

$ /data/kafka_2.13-3.0.0/bin/kafka-topics.sh --bootstrap-server 192.168.233.132:9092 --topic quickstart77-events --describe
Topic: quickstart77-events	TopicId: A7bNWYseSNqlGfs1XPhN9g	PartitionCount: 6	ReplicationFactor: 2	Configs: segment.bytes=1073741824Topic: quickstart77-events	Partition: 0	Leader: 5	Replicas: 5,4	Isr: 4,5Topic: quickstart77-events	Partition: 1	Leader: 1	Replicas: 1,2	Isr: 1,2Topic: quickstart77-events	Partition: 2	Leader: 4	Replicas: 4,3	Isr: 4,3Topic: quickstart77-events	Partition: 3	Leader: 2	Replicas: 2,0	Isr: 2,0Topic: quickstart77-events	Partition: 4	Leader: 3	Replicas: 3,5	Isr: 3,5Topic: quickstart77-events	Partition: 5	Leader: 0	Replicas: 0,1	Isr: 0,1

leader也能自动恢复了