Xuze Yang created KAFKA-17198:
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Summary: Partition imbalance after alter due to inconsistent order
of broker list
Key: KAFKA-17198
URL: https://issues.apache.org/jira/browse/KAFKA-17198
Project: Kafka
Issue Type: Bug
Components: core
Affects Versions: 2.7.2
Reporter: Xuze Yang
Three broker environments. Create a topic with 1 replica and 2 partition, and
then alter the topic to 3 partitions, which are not evenly distributed across 3
brokers.
command as belows：
#Create a topic with 1 replica and 2 partitions
kafka-topics.sh --create --bootstrap-server 192.168.181.204:9092
--replication-factor 1 --partitions 2 --topic test
#Expand to 3 partitions
kafka-topics.sh --bootstrap-server 192.168.181.204:9092 --alter --topic test
--partitions 3
#View the distribution of topic partitions
kafka-topics.sh --bootstrap-server 192.168.181.204:9092 --describe --topic test
Repeat the above command 5 times to obtain 5 topics: test1, test2, test3,
test4, and test5. The partition distribution of the 5 topics is shown below:
!复现问题-分区分布不均衡.png!
It can be seen that each topic's 3 partitions are only distributed on 2
brokers, instead of the expected 3 brokers.
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