I have 5 broker kafka cluster. Replication factor = 3, Number of partition = 12, Min Insync repica (ISR) = 3
First output is when all server are up and running. Second output is when I bring down server id = 4. Another server from ISR take server 4's place as leader of partition, so that's good. I was expecting another broker will join ISR in place for server 4. Why doesn't that happen? Since min ISR is 3, I cannot publish to certain partitions of the topic. When server 4 comes back up, it starts to work fine. ./bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic xxx Topic:xxx PartitionCount:12 ReplicationFactor:3 Configs: Topic: xxx Partition: 0 Leader: 5 Replicas: 5,2,3 Isr: 3,2,5 Topic: xxx Partition: 1 Leader: 1 Replicas: 1,3,4 Isr: 3,4,1 Topic: xxx Partition: 2 Leader: 2 Replicas: 2,4,5 Isr: 2,5,4 Topic: xxx Partition: 3 Leader: 3 Replicas: 3,5,1 Isr: 5,3,1 Topic: xxx Partition: 4 Leader: 4 Replicas: 4,1,2 Isr: 2,4,1 Topic: xxx Partition: 5 Leader: 5 Replicas: 5,3,4 Isr: 3,5,4 Topic: xxx Partition: 6 Leader: 1 Replicas: 1,4,5 Isr: 5,4,1 Topic: xxx Partition: 7 Leader: 2 Replicas: 2,5,1 Isr: 5,2,1 Topic: xxx Partition: 8 Leader: 3 Replicas: 3,1,2 Isr: 3,2,1 Topic: xxx Partition: 9 Leader: 4 Replicas: 4,2,3 Isr: 3,2,4 Topic: xxx Partition: 10 Leader: 5 Replicas: 5,4,1 Isr: 5,4,1 Topic: xxx Partition: 11 Leader: 1 Replicas: 1,5,2 Isr: 5,2,1 ./bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic xxx Topic:xxx PartitionCount:12 ReplicationFactor:3 Configs: Topic: xxx Partition: 0 Leader: 5 Replicas: 5,2,3 Isr: 3,2,5 Topic: xxx Partition: 1 Leader: 1 Replicas: 1,3,4 Isr: 3,1 Topic: xxx Partition: 2 Leader: 2 Replicas: 2,4,5 Isr: 2,5 Topic: xxx Partition: 3 Leader: 3 Replicas: 3,5,1 Isr: 5,3,1 Topic: xxx Partition: 4 Leader: 1 Replicas: 4,1,2 Isr: 2,1 Topic: xxx Partition: 5 Leader: 5 Replicas: 5,3,4 Isr: 3,5 Topic: xxx Partition: 6 Leader: 1 Replicas: 1,4,5 Isr: 5,1 Topic: xxx Partition: 7 Leader: 2 Replicas: 2,5,1 Isr: 5,2,1 Topic: xxx Partition: 8 Leader: 3 Replicas: 3,1,2 Isr: 3,2,1 Topic: xxx Partition: 9 Leader: 2 Replicas: 4,2,3 Isr: 2,3 Topic: xxx Partition: 10 Leader: 5 Replicas: 5,4,1 Isr: 5,1 Topic: xxx Partition: 11 Leader: 1 Replicas: 1,5,2 Isr: 5,2,1 ./bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic xxx Topic:xxx PartitionCount:12 ReplicationFactor:3 Configs: Topic: xxx Partition: 0 Leader: 5 Replicas: 5,2,3 Isr: 3,2,5 Topic: xxx Partition: 1 Leader: 1 Replicas: 1,3,4 Isr: 3,1,4 Topic: xxx Partition: 2 Leader: 2 Replicas: 2,4,5 Isr: 2,5,4 Topic: xxx Partition: 3 Leader: 3 Replicas: 3,5,1 Isr: 5,3,1 Topic: xxx Partition: 4 Leader: 4 Replicas: 4,1,2 Isr: 2,1,4 Topic: xxx Partition: 5 Leader: 5 Replicas: 5,3,4 Isr: 3,5,4 Topic: xxx Partition: 6 Leader: 1 Replicas: 1,4,5 Isr: 5,1,4 Topic: xxx Partition: 7 Leader: 2 Replicas: 2,5,1 Isr: 5,2,1 Topic: xxx Partition: 8 Leader: 3 Replicas: 3,1,2 Isr: 3,2,1 Topic: xxx Partition: 9 Leader: 4 Replicas: 4,2,3 Isr: 2,3,4 Topic: xxx Partition: 10 Leader: 5 Replicas: 5,4,1 Isr: 5,1,4 Topic: xxx Partition: 11 Leader: 1 Replicas: 1,5,2 Isr: 5,2,1 Thanks, Shri This e-mail and its contents (to include attachments) are the property of National Health Systems, Inc., its subsidiaries and affiliates, including but not limited to Rx.com Community Healthcare Network, Inc. and its subsidiaries, and may contain confidential and proprietary or privileged information. If you are not the intended recipient of this e-mail, you are hereby notified that any unauthorized disclosure, copying, or distribution of this e-mail or of its attachments, or the taking of any unauthorized action based on information contained herein is strictly prohibited. Unauthorized use of information contained herein may subject you to civil and criminal prosecution and penalties. If you are not the intended recipient, please immediately notify the sender by telephone at 800-433-5719 or return e-mail and permanently delete the original e-mail.