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Posted to dev@kafka.apache.org by "Gaurav Narula (Jira)" <ji...@apache.org> on 2025/10/09 10:18:00 UTC

[jira] [Created] (KAFKA-19776) Incorrect leaderId and leaderEpoch logged in Partition#makeFollower

Gaurav Narula created KAFKA-19776:
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             Summary: Incorrect leaderId and leaderEpoch logged in Partition#makeFollower
                 Key: KAFKA-19776
                 URL: https://issues.apache.org/jira/browse/KAFKA-19776
             Project: Kafka
          Issue Type: Bug
            Reporter: Gaurav Narula
            Assignee: Gaurav Narula


[Partition::makeFollower|https://github.com/apache/kafka/blob/be3e40c45ac9a70833ce0d5735ad141a5bd24627/core/src/main/scala/kafka/cluster/Partition.scala#L877] logs the existing leader-id and existing leader epoch if the partition registration has a leader epoch > the existing leader epoch.

There's a bug in the logging as we update the existing leaderId and leaderEpoch with the latest values from partition registration prior to logging them, thereby never logging the existing values.





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