• Status
• Motivation
• Proposed Change
• New and Changed Public Interfaces
• Migration Plan and Compatibility
• Rejected Alternatives

Status

Current state: Under Discussion

Discussion thread: https://lists.apache.org/thread/01bs42crlkn5jr1r846vflp293zv2t86

JIRA: KAFKA-1974920018

Motivation

The `kafka-feature.sh` command-line tool currently has two issues that impact usability and consistency:

...

A new boolean flag, `--unstable-feature-versions`, will be added to the `version-mapping` subcommand in both `kafka-feature.sh` and `kafka-storage.sh`. When this flag is present, the tool will call `MetadataVersion.fromVersionString()` with the unstableFeatureVersionsEnabled flag set to true, allowing users to see feature mappings for development and testing versions. By default (without the flag), only production/stable metadata versions will be included.

Excluding unstable feature versions is the behavior before KAFKA-19544, so this is not a breaking change and can be introduced in 4.x.

New and Changed Public Interfaces

...