David Arthur created KAFKA-17457:
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Summary: Raise minimum MetadataVersion for ZK migration to 3.6
Key: KAFKA-17457
URL: https://issues.apache.org/jira/browse/KAFKA-17457
Project: Kafka
Issue Type: Task
Components: controller, migration
Reporter: David Arthur
Fix For: 3.6.3, 3.7.2, 3.8.0
In the 3.6.0 release notes, we announced that ZK migrations were production
ready.
> The 3.6.0 release marked the first production ready release for the migration
> of Kafka clusters from a ZooKeeper metadata system to a KRaft metadata
> system. Users wanting to perform this migration are advised to first upgrade
> to 3.6.2 or 3.7.1 to receive important bug fixes.
Part of the reasoning behind this announcement was that the migration was
feature complete at this point (migration transactions and migration of
delegation tokens were included in 3.6).
If users are on a software version of 3.6 or higher, we should not let them
perform the migration at an older MetadataVersion. Otherwise, the migration
will be done without the use of metadata transactions, which is not safe.
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