David Arthur created KAFKA-15532:
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Summary: ZkWriteBehindLag should not be reported by inactive
controllers
Key: KAFKA-15532
URL: https://issues.apache.org/jira/browse/KAFKA-15532
Project: Kafka
Issue Type: Bug
Affects Versions: 3.6.0
Reporter: David Arthur
Since only the active controller is performing the dual-write to ZK during a
migration, it should be the only controller to report the ZkWriteBehindLag
metric.
Currently, if the controller fails over during a migration, the previous active
controller will incorrectly report its last value for ZkWriteBehindLag forever.
Instead, it should report zero.
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