THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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FetchResponse already contains CurrentLeader introduced in KIP-595, which will be used to propagate LeaderId & LeaderEpoch. Additionally NodeEndpoints is introduced to propagate host, port & rack for the current-leaders enumerated across all PartitionDatas. NodeEndpoints is a tagged field, which is a minor optimisation of saving bytes on the network, as it won’t be set always. The version has been bumped to 16. Allthough note that CurrentLeader was introduced in version 12, it will be supported in Java client from 16. . Note that new leader information fields, CurrentLeader & NodeEndpoints are tagged as minor optimisation to save few bytes on the network. Since these fields are optional version 16 onwards. Broker would only set these fields in case of specific errors(NOT_LEADER_OR_FOLLOWER or FENCED_LEADER_EPOCH), and only if it has this information available.
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{
"apiKey": 1,
"type": "response",
"name": "FetchResponse",
"validVersions": "0-16",
"flexibleVersions": "12+",
"fields": [
{ "name": "ThrottleTimeMs", "type": "int32", "versions": "1+", "ignorable": true,
"about": "The duration in milliseconds for which the request was throttled due to a quota violation, or zero if the request did not violate any quota." },
{ "name": "ErrorCode", "type": "int16", "versions": "7+", "ignorable": true,
"about": "The top level response error code." },
{ "name": "SessionId", "type": "int32", "versions": "7+", "default": "0", "ignorable": false,
"about": "The fetch session ID, or 0 if this is not part of a fetch session." },
{ "name": "Responses", "type": "[]FetchableTopicResponse", "versions": "0+",
"about": "The response topics.", "fields": [
{ "name": "Topic", "type": "string", "versions": "0-12", "ignorable": true, "entityType": "topicName",
"about": "The topic name." },
{ "name": "TopicId", "type": "uuid", "versions": "13+", "ignorable": true, "about": "The unique topic ID"},
{ "name": "Partitions", "type": "[]PartitionData", "versions": "0+",
"about": "The topic partitions.", "fields": [
{ "name": "PartitionIndex", "type": "int32", "versions": "0+",
"about": "The partition index." },
{ "name": "ErrorCode", "type": "int16", "versions": "0+",
"about": "The error code, or 0 if there was no fetch error." },
{ "name": "HighWatermark", "type": "int64", "versions": "0+",
"about": "The current high water mark." },
{ "name": "LastStableOffset", "type": "int64", "versions": "4+", "default": "-1", "ignorable": true,
"about": "The last stable offset (or LSO) of the partition. This is the last offset such that the state of all transactional records prior to this offset have been decided (ABORTED or COMMITTED)" },
{ "name": "LogStartOffset", "type": "int64", "versions": "5+", "default": "-1", "ignorable": true,
"about": "The current log start offset." },
{ "name": "DivergingEpoch", "type": "EpochEndOffset", "versions": "12+", "taggedVersions": "12+", "tag": 0,
"about": "In case divergence is detected based on the `LastFetchedEpoch` and `FetchOffset` in the request, this field indicates the largest epoch and its end offset such that subsequent records are known to diverge",
"fields": [
{ "name": "Epoch", "type": "int32", "versions": "12+", "default": "-1" },
{ "name": "EndOffset", "type": "int64", "versions": "12+", "default": "-1" }
]},
{ "name": "CurrentLeader", "type": "LeaderIdAndEpoch",
"versions": "12+", "taggedVersions": "12+", "tag": 1, "fields": [
{ "name": "LeaderId", "type": "int32", "versions": "12+", "default": "-1", "entityType": "brokerId",
"about": "The ID of the current leader or -1 if the leader is unknown."},
{ "name": "LeaderEpoch", "type": "int32", "versions": "12+", "default": "-1",
"about": "The latest known leader epoch"}
]},
{ "name": "SnapshotId", "type": "SnapshotId",
"versions": "12+", "taggedVersions": "12+", "tag": 2,
"about": "In the case of fetching an offset less than the LogStartOffset, this is the end offset and epoch that should be used in the FetchSnapshot request.",
"fields": [
{ "name": "EndOffset", "type": "int64", "versions": "0+", "default": "-1" },
{ "name": "Epoch", "type": "int32", "versions": "0+", "default": "-1" }
]},
{ "name": "AbortedTransactions", "type": "[]AbortedTransaction", "versions": "4+", "nullableVersions": "4+", "ignorable": true,
"about": "The aborted transactions.", "fields": [
{ "name": "ProducerId", "type": "int64", "versions": "4+", "entityType": "producerId",
"about": "The producer id associated with the aborted transaction." },
{ "name": "FirstOffset", "type": "int64", "versions": "4+",
"about": "The first offset in the aborted transaction." }
]},
{ "name": "PreferredReadReplica", "type": "int32", "versions": "11+", "default": "-1", "ignorable": false, "entityType": "brokerId",
"about": "The preferred read replica for the consumer to use on its next fetch request"},
{ "name": "Records", "type": "records", "versions": "0+", "nullableVersions": "0+", "about": "The record data."}
]}
]},
// ---------- Start new field ----------
{ "name": "NodeEndpoints", "type": "[]NodeEndpoint", "versions": "16+", "taggedVersions": "16+", "tag": 0,
"about": "Endpoints for all current-leaders enumerated in PartitionData, with errors NOT_LEADER_OR_FOLLOWER & FENCED_LEADER_EPOCH.", "fields": [
{ "name": "NodeId", "type": "int32", "versions": "16+",
"mapKey": true, "entityType": "brokerId", "about": "The ID of the associated node."},
{ "name": "Host", "type": "string", "versions": "16+",
"about": "The node's hostname." },
{ "name": "Port", "type": "int32", "versions": "16+",
"about": "The node's port." },
{ "name": "Rack", "type": "string", "versions": "16+", "nullableVersions": "16+", "default": "null",
"about": "The rack of the node, or null if it has not been assigned to a rack." }
]}
// ---------- End new field ----------
]
} |
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{
"apiKey": 0,
"type": "response",
"name": "ProduceResponse",
"validVersions": "0-10",
"flexibleVersions": "9+",
"fields": [
{ "name": "Responses", "type": "[]TopicProduceResponse", "versions": "0+",
"about": "Each produce response", "fields": [
{ "name": "Name", "type": "string", "versions": "0+", "entityType": "topicName", "mapKey": true,
"about": "The topic name" },
{ "name": "PartitionResponses", "type": "[]PartitionProduceResponse", "versions": "0+",
"about": "Each partition that we produced to within the topic.", "fields": [
{ "name": "Index", "type": "int32", "versions": "0+",
"about": "The partition index." },
{ "name": "ErrorCode", "type": "int16", "versions": "0+",
"about": "The error code, or 0 if there was no error." },
{ "name": "BaseOffset", "type": "int64", "versions": "0+",
"about": "The base offset." },
{ "name": "LogAppendTimeMs", "type": "int64", "versions": "2+", "default": "-1", "ignorable": true,
"about": "The timestamp returned by broker after appending the messages. If CreateTime is used for the topic, the timestamp will be -1. If LogAppendTime is used for the topic, the timestamp will be the broker local time when the messages are appended." },
{ "name": "LogStartOffset", "type": "int64", "versions": "5+", "default": "-1", "ignorable": true,
"about": "The log start offset." },
{ "name": "RecordErrors", "type": "[]BatchIndexAndErrorMessage", "versions": "8+", "ignorable": true,
"about": "The batch indices of records that caused the batch to be dropped", "fields": [
{ "name": "BatchIndex", "type": "int32", "versions": "8+",
"about": "The batch index of the record that cause the batch to be dropped" },
{ "name": "BatchIndexErrorMessage", "type": "string", "default": "null", "versions": "8+", "nullableVersions": "8+",
"about": "The error message of the record that caused the batch to be dropped"}
]},
{ "name": "ErrorMessage", "type": "string", "default": "null", "versions": "8+", "nullableVersions": "8+", "ignorable": true,
"about": "The global error message summarizing the common root cause of the records that caused the batch to be dropped"},
// ---------- Start new field ----------
{ "name": "CurrentLeader", "type": "LeaderIdAndEpoch",
"versions": "10+", "taggedVersions": "10+", "tag": 0, "fields": [
{ "name": "LeaderId", "type": "int32", "versions": "10+", "default": "-1", "entityType": "brokerId",
"about": "The ID of the current leader or -1 if the leader is unknown."},
{ "name": "LeaderEpoch", "type": "int32", "versions": "10+", "default": "-1",
"about": "The latest known leader epoch"}
]}
// ---------- End new field ----------
]}
]},
{ "name": "ThrottleTimeMs", "type": "int32", "versions": "1+", "ignorable": true, "default": "0",
"about": "The duration in milliseconds for which the request was throttled due to a quota violation, or zero if the request did not violate any quota." },
// ---------- Start new field ----------
{ "name": "NodeEndpoints", "type": "[]NodeEndpoint", "versions": "10+", "taggedVersions": "10+", "tag": 0,
"about": "Endpoints for all current-leaders enumerated in PartitionProduceResponses, with errors NOT_LEADER_OR_FOLLOWER & FENCED_LEADER_EPOCH.", "fields": [
{ "name": "NodeId", "type": "int32", "versions": "10+",
"mapKey": true, "entityType": "brokerId", "about": "The ID of the associated node."},
{ "name": "Host", "type": "string", "versions": "10+",
"about": "The node's hostname." },
{ "name": "Port", "type": "int32", "versions": "10+",
"about": "The node's port." },
{ "name": "Rack", "type": "string", "versions": "10+", "nullableVersions": "10+", "default": "null",
"about": "The rack of the node, or null if it has not been assigned to a rack." }
// ---------- End new field ----------
]}
]
} |
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