NIKHIL created KAFKA-10106:
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Summary: measure and log time taken to handle LeaderAndIsr request
Key: KAFKA-10106
URL: https://issues.apache.org/jira/browse/KAFKA-10106
Project: Kafka
Issue Type: Improvement
Reporter: NIKHIL
ReplicaManager!becomeLeaderOrFollower handles the LeaderAndIsr request,
StateChangeLogger logs when this request is handled, however it can be useful
to log when this calls ends and record the time taken, can help operationally.
Proposal is to ReplicaManager!becomeLeaderOrFollower start measuring the time
before the `replicaStateChangeLock` is acquired and log before the response is
returned.
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