What is ReadShareGroupStateSummary?
Reads only the epoch and start offset without fetching full delivery state, for lightweight coordination checks. The coordinator uses this to quickly verify state consistency without the overhead of a full ReadShareGroupState, particularly during startup and failover.
Wire Diagram
Request Header · flexible
message_size
int32 · 4B
api_key
int16 · 2B
api_version
int16 · 2B
correlation_id
int32 · 4B
client_id
string (compact)
tagged
var
ReadShareGroupStateSummaryRequest v0
GroupId
string (compact)
tagged
var
TopicId
uuid · 16B
tagged
var
Partition
int32 · 4B
LeaderEpoch
int32 · 4B
tagged
var
Schema & Example
Schema { "GroupId": string, "Topics": [{ "TopicId": uuid, "Partitions": [{ "Partition": int32, "LeaderEpoch": int32 }] }] }
Example { "GroupId": "order-processors", "Topics": [{ "TopicId": "550e8400-e29b-41d4-a716-446655440000", "Partitions": [{ "Partition": 0, "LeaderEpoch": 17 }] }] }