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Kafka UpdateRaftVoter Response Wire Format v0 — Binary Protocol Layout

What is UpdateRaftVoter?

Updates a KRaft controller node's listener endpoints in the quorum configuration after it migrates to a new host. Without this, other voters keep trying to reach the old address, which can cause the quorum to lose majority if the unreachable node is a voter.

Related Errors

INVALID_VOTER_KEY · VOTER_NOT_FOUND

Wire Diagram

Response Header · flexible
message_size int32 · 4B
correlation_id int32 · 4B
tagged var
UpdateRaftVoterResponse v0
ThrottleTimeMs int32 · 4B
ErrorCode int16 · 2B
CurrentLeader struct
tagged var
LeaderId int32 · 4B
LeaderEpoch int32 · 4B
Host string (compact)
Port int32 · 4B
tagged var

Schema & Example

Schema
{
  "ThrottleTimeMs": int32,
  "ErrorCode": int16,
  "CurrentLeader": {
    "LeaderId": int32,
    "LeaderEpoch": int32,
    "Host": string,
    "Port": int32
  }
}
Example
{
  "ThrottleTimeMs": 0,
  "ErrorCode": 0,
  "CurrentLeader": {
    "LeaderId": 1,
    "LeaderEpoch": 17,
    "Host": "broker-1.kafka.local",
    "Port": 9092
  }
}