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Kafka WriteShareGroupState Response Wire Format v0 — Binary Protocol Layout

What is WriteShareGroupState?

Durably persists delivery state updates after consumers acknowledge records. This write is on the critical path of ShareAcknowledge, so high latency here (slow disk on the coordinator broker) directly impacts acknowledgement throughput.

Related Errors

CLUSTER_AUTHORIZATION_FAILED · COORDINATOR_NOT_AVAILABLE

Wire Diagram

Response Header · flexible
message_size int32 · 4B
correlation_id int32 · 4B
tagged var
WriteShareGroupStateResponse v0
Results array
tagged var
TopicId uuid · 16B
Partitions array
tagged var
Partition int32 · 4B
ErrorCode int16 · 2B
ErrorMessage? string (compact)
tagged var

Schema & Example

Schema
{
  "Results": [{
      "TopicId": uuid,
      "Partitions": [{
          "Partition": int32,
          "ErrorCode": int16,
          "ErrorMessage": string?
      }]
  }]
}
Example
{
  "Results": [{
      "TopicId": "550e8400-e29b-41d4-a716-446655440000",
      "Partitions": [{
          "Partition": 0,
          "ErrorCode": 0,
          "ErrorMessage": "NETWORK_EXCEPTION"
      }]
  }]
}