Zhongjing, can you show some server.log ? ie:broker 4 or the leader of topic "log_error".
发件人: 俞忠静 发送时间: 2015-03-02 18:37 收件人: users@kafka.apache.org 抄送: 吴红芳; 邵宏亮; 方超超 主题: Kafka broker failed to work when migrating the broker to another machine Hi, I set up a Kafka cluster with 5 brokers, with the broker ids 0, 1, 2, 3, 4. I stop the node whose broke id is 4, and deploy a new broker in a new machine with the broker id 4. But I find the new broker failed to work, it never appears in ISR. [zk: localhost:2181(CONNECTED) 3] ls /kafka/test2/brokers/ids [3, 2, 1, 0, 4] from zk, we can see the broker 4 has joined the cluster [hadoop@slave01 bin]$ ./kafka-topics.sh --zookeeper 192.168.135.102/kafka/test2 --topic log_error --describe Topic:log_error PartitionCount:1 ReplicationFactor:3 Configs: Topic: log_error Partition: 0 Leader: 0 Replicas: 1,4,0 Isr: 0,1 we can see 4 never appear in ISR below is the content in kafka log dir: [yuzhongjing@localhost kafka-logs]$ ll total 0 -rw-rw-r-- 1 yuzhongjing yuzhongjing 0 Mar 2 16:24 recovery-point-offset-checkpoint -rw-rw-r-- 1 yuzhongjing yuzhongjing 0 Mar 2 16:24 replication-offset-checkpoint [yuzhongjing@localhost kafka-logs]$ date Mon Mar 2 19:18:00 CST 2015