Module group_version 

KIP-848 group.version feature-level constants.

It is a plain integer feature with no X.Y-IVn string table: level 0 means classic consumer groups only, and level 1 means next-gen (KIP-848) protocol GA. The range and the metadata.version bootstrap-default threshold are pinned against the cp-kafka 4.0 GroupVersion enum, verified empirically 2026-05-30.

Constants

GROUP_VERSION_FEATURE

KIP-848 feature name.

GROUP_VERSION_GA_METADATA_LEVEL

group.version=1 is the bootstrap default once the formatted metadata.version is at least this level (4.0-IV0 = 22).

GROUP_VERSION_MAX

Maximum supported level: next-gen (KIP-848) GA.

GROUP_VERSION_MIN

Minimum supported level: classic-only.