ZhangShuai created KAFKA-7468:
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Summary: KafkaController no need to startup the inner
kafkaScheducer when auto.leader.rebalance.enable is false
Key: KAFKA-7468
URL: https://issues.apache.org/jira/browse/KAFKA-7468
Project: Kafka
Issue Type: Improvement
Components: controller
Affects Versions: 2.0.0
Reporter: ZhangShuai
KafkaController has its inner member KafkaScheduler instance to schedule auto
leader rebalance tasks. But when the auto rebalance config set false, no need
to startup the kafkaScheduler, because that created a non-used
ScheduledThreadPoolExecutor with one thread.
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