kafka修改分区数

查看现在副本分配情况

../bin/kafka-topics.sh --zookeeper 127.0.0.1:2181 --describe  --topic test1
Topic:test1       PartitionCount:3        ReplicationFactor:2     Configs:
        Topic: test1      Partition: 0    Leader: 2       Replicas: 2,4   Isr: 2,4
        Topic: test1      Partition: 1    Leader: 3       Replicas: 3,5   Isr: 3,5
        Topic: test1      Partition: 2    Leader: 4       Replicas: 4,1   Isr: 4,1

topic 分区扩容

./kafka-topics.sh --zookeeper 127.0.0.1:2181 -alter --partitions 4 --topic test1

参考：https://www.jianshu.com/p/64b32a2fd998