[KAFKA-17457] Raise minimum MetadataVersion for ZK migration to 3.6 - ASF JIRA

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Details

Type: Task
Status: Resolved
Priority: Blocker
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 3.9.0, 3.7.2, 3.8.1
Component/s: controller, migration
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None

Description

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.