Kafka UpdateFeatures Response Wire Format v2 — Binary Protocol Layout

What is UpdateFeatures?

Finalizes feature version flags during cluster upgrades via kafka-features.sh. After all brokers support a new feature version, an operator calls this to activate it. Some features (like the new consumer group protocol) are gated behind feature flags and require explicit activation.

Schema
{
  "ThrottleTimeMs": int32,
  "ErrorCode": int16,
  "ErrorMessage": string?
}

Example
{
  "ThrottleTimeMs": 0,
  "ErrorCode": 0,
  "ErrorMessage": "NETWORK_EXCEPTION"
}