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Mickael Maison commented on KAFKA-16247: ---------------------------------------- I attached the full broker and controller logs at TRACE level: KAFKA-16247.zip In this case it was broker-2 that was not able to get back in-sync after restarting in KRaft mode. > replica keep out-of-sync after migrating broker to KRaft > -------------------------------------------------------- > > Key: KAFKA-16247 > URL: https://issues.apache.org/jira/browse/KAFKA-16247 > Project: Kafka > Issue Type: Bug > Affects Versions: 3.7.0 > Reporter: Luke Chen > Priority: Major > Attachments: KAFKA-16247.zip > > > We are deploying 3 controllers and 3 brokers, and following the steps in > [doc|https://kafka.apache.org/documentation/#kraft_zk_migration]. When we're > moving from "Enabling the migration on the brokers" state to "Migrating > brokers to KRaft" state, the first rolled broker becomes out-of-sync and > never become in-sync. > From the log, we can see some "reject alterPartition" errors, but it just > happen 2 times. Theoretically, the leader should add the follower into ISR > as long as the follower is fetching since we don't have client writing data. > But can't figure out why it didn't fetch. > Logs: https://gist.github.com/showuon/64c4dcecb238a317bdbdec8db17fd494 -- This message was sent by Atlassian Jira (v8.20.10#820010)