Kafka UnregisterController Response Wire Format v0 — Binary Protocol Layout

What is UnregisterController?

Removes a controller from a KRaft cluster's registered controller set, taking a single controller ID. The active controller writes an UnregisterControllerRecord so the node drops out of the metadata image; this backs kafka-cluster unregister-controller and kafka-metadata-quorum remove-controller --unregister, and needs metadata version 4.4-IV2. Added on trunk after 4.3 — no released broker accepts it.

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

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