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https://issues.apache.org/jira/browse/KAFKA-16247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luke Chen updated KAFKA-16247:
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Summary: replica keep out-of-sync after migrating broker to KRaft (was: 1
replica keep out-of-sync after migrating broker to KRaft)
> 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
> Reporter: Luke Chen
> Priority: Major
>
> 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
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