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Kafka UpdateFeatures Response Wire Format v1 — 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.

Related Errors

FEATURE_UPDATE_FAILED · INVALID_UPDATE_VERSION · NOT_CONTROLLER

Wire Diagram

Response Header · flexible
message_size int32 · 4B
correlation_id int32 · 4B
tagged var
UpdateFeaturesResponse v1
ThrottleTimeMs int32 · 4B
ErrorCode int16 · 2B
ErrorMessage? string (compact)
Results array
tagged var
Feature string (compact)
ErrorCode int16 · 2B
ErrorMessage? string (compact)
tagged var

Schema & Example

Schema
{
  "ThrottleTimeMs": int32,
  "ErrorCode": int16,
  "ErrorMessage": string?,
  "Results": [{
      "Feature": string,
      "ErrorCode": int16,
      "ErrorMessage": string?
  }]
}
Example
{
  "ThrottleTimeMs": 0,
  "ErrorCode": 0,
  "ErrorMessage": "NETWORK_EXCEPTION",
  "Results": [{
      "Feature": "kraft.version",
      "ErrorCode": 0,
      "ErrorMessage": null
  }]
}