{
 

{
  "apiKey": 28,
   "type": "request",
   "listeners": ["broker"],
   "name": "TxnOffsetCommitRequest",
   // Version 1 is the same as version 0...
  //
  // Version 26 adds the committed leader epoch.
  //
  // Version 3 adds the member.id, group.instance.id and generation.id.
  //
  // Version 4 adds support for new error code TRANSACTION_ABORTABLE (KIP-890).
  //
  // Version 5 is the same as version 4 (KIP-890). Note when TxnOffsetCommit
  // requests are used in transaction, if transaction V2 (KIP_890 part 2) is
  // enabled, the TxnOffsetCommit request will also include the function for a
  // AddOffsetsToTxn call. If V2 is disabled, the client can't use
  // TxnOffsetCommit request version higher than 4 within a transaction.
  //
  // Version 6 adds topic ID support (replacing topic names), and supports
  // GROUP_ID_NOT_FOUND and STALE_MEMBER_EPOCH error codes.
  "validVersions": "0-6",
  "flexibleVersions": "3+",
  "fields": [
    support for topic IDs and removes support for
  // topic names. It also returns GROUP_ID_NOT_FOUND when the group
  // does not exist and STALE_MEMBER_EPOCH when the member epoch is
  // stale under the new consumer group protocol (KIP-1319).
  "validVersions": "0-6",                                    // CHANGED
  "flexibleVersions": "3+",
  "fields": [
    { "name": "TransactionalId", "type": "string", "versions": "0+",
      "entityType": "transactionalId",
      "about": "The ID of the transaction." },
    { "name": "TransactionalIdGroupId", "type": "string", "versions": "0+",
         "entityType": "transactionalIdgroupId",
         "about": "The ID of the transactiongroup." },
      { "name": "GroupIdProducerId", "type": "stringint64", "versions": "0+",
         "entityType": "groupIdproducerId",
         "about": "The current producer ID in use ofby the transactional groupID." },
      { "name": "ProducerIdProducerEpoch", "type": "int64int16", "versions": "0+",
         "entityTypeabout": "producerId",
      "about": "The current producer ID in use by the transactionalThe current epoch associated with the producer ID." },
      { "name": "ProducerEpochGenerationIdOrMemberEpoch", "type": "int16int32",  // CHANGED
      "versions": "03+",
      ""default": "-1",
      "about": "The current generation of the group if using the classic group protocol or the member epoch associatedif withusing the producerconsumer IDprotocol." },
      { "name": "GenerationIdMemberId", "type": "int32string", "versions": "3+",
         "default": "-1",
         "about": "The generation ofmember ID assigned by the group consumercoordinator." },
      { "name": "MemberIdGroupInstanceId", "type": "string",
      "versions": "3+",
      "nullableVersions": "3+", "default": "null",
         "about": "The member ID assignedunique identifier of the consumer instance provided by theend group coordinatoruser." },
      { "name": "GroupInstanceIdTopics", "type": "string[]TxnOffsetCommitRequestTopic",
      "versions": "30+",
       "nullableVersions": "3+", "defaultabout": "null",
      "about": "The unique identifier of the consumer instance provided by end user." },
   Each topic that we want to commit offsets for.",
      "fields": [
        { "name": "TopicsName", "type" : "[]TxnOffsetCommitRequestTopicstring",
             "versions": "0+-5",
        "about": "Each topic that we want to commit offsets for.", "fields": [
      // Updated
      { "name": "Name", "type": "string", "versions": "0-5",             
        "ignorable": true,        // CHANGED
          "entityType": "topicName",                    
        "ignorable": true,
          "about": "The topic name." },
      // New
      { "name": "TopicId", "type": "uuid", "versions": "6+",            
        "ignorable": true,        //  NEW
                                    
       "versions": "6+", "ignorable": true,
          "about": "The unique topic ID." },
                              
      { "name{ "name": "Partitions",
          "type": "Partitions[]TxnOffsetCommitRequestPartition",
            "type": "[]TxnOffsetCommitRequestPartition", "versions": "0+",
                 "about": "The partitions inside the topic that we want to commit offsets for.",
                 "fields": [
         { "name": "      { "name": "PartitionIndex", "type": "int32", "versions": "0+" },
          "about": "The index of the partition within the topic." },
        { "name": "CommittedOffset", "type": "int64", "versions": "0+" },
            "about": "The message offset to be committed." },
        { "name": "CommittedLeaderEpoch", "type": "int32",
              "versions": "2+",
          "default": "-1", "ignorable": true },
           "about": "The leader epoch of the last consumed record." },
        { "name": "CommittedMetadata", "type": "string",
              "versions": "0+",
          "nullableVersions": "0+", }
              "about": "Any associated metadata the client wants to keep." }
      ]}
    ]}
  ]
        }
      ]
    }
  ]
}

{
  "apiKey": 28,
  "type": "response",
  "name": "TxnOffsetCommitResponse",
  // ...
  // Version 6 adds support for topic IDs and removes support for
  // topic names. It can also return GROUP_ID_NOT_FOUND and
  // STALE_MEMBER_EPOCH (KIP-1319).
  "validVersions": "0-6",                                    // CHANGED
  "flexibleVersions": "3+",
  // Supported errors:
  // ...
  // -

{
  "apiKey": 28,
  "type": "response",
  "name": "TxnOffsetCommitResponse",
  // Starting in version 1, on quota violation, brokers send out responses
  // before throttling.
  //
  // Version 2 is the same as version 1.
  //
  // Version 3 adds illegal generation, fenced instance id, and unknown
  // member id errors.
  //
  // Version 4 adds support for new error code TRANSACTION_ABORTABLE
  // (KIP-890).
  //
  // Version 5 is the same with version 3 (KIP-890).
  //
  // Version 6 adds topic ID support (replacing topic names), and supports
  // GROUP_ID_NOT_FOUND, STALE_MEMBER_EPOCH, and UNKNOWN_TOPIC_ID error
  // codes.
  "validVersions": "0-6",
  "flexibleVersions": "3+",
  "fields": [
    { "name": "ThrottleTimeMs", "type": "int32", "versions": "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." },
    { "name": "Topics", "type": "[]TxnOffsetCommitResponseTopic",
      "versions": "0+",
      "about": "The responses for each topic.", "fields": [
 (version 6+)                       // NEW
  // - STALE_MEMBER_EPOCH (version 6+)                       // NEW
  // - UNKNOWN_TOPIC_ID (version 6+)                         // UpdatedNEW
  "fields": [
      { "name": "NameThrottleTimeMs", "type": "stringint32", "versions": "0-5+" },
          
        "ignorable": true, "entityType{ "name": "Topics",
      "type": "[]TxnOffsetCommitResponseTopic", "versions": "topicName0+",
               
        "about": "The topic name." },
  "about": "The responses for each topic.", "fields": [
    // New
      { "name": "TopicIdName", "type": "uuidstring",
          "versions": "6+0-5",        
        "ignorable": true,                                          
     //   "about": "The unique topic ID." },                          
      { "name": "Partitions",
        "type": "[]TxnOffsetCommitResponsePartition", "versions": "0+",
        "about": "The responses for each partition in the topic.",
        "fields": [
        { "name": "PartitionIndex", "type": "int32", "versions": "0+",
         CHANGED
          "entityType": "topicName", "ignorable": true,
          "about": "The topic name." },
        { "name": "TopicId", "type": "uuid",                  // NEW
          "versions": "6+", "ignorable": true,
          "about": "The partitiontopic indexID." },
            { "name": "ErrorCodePartitions",
          "type": "int16[]TxnOffsetCommitResponsePartition",
          "versions": "0+",
          "about": "The error code, or 0 if there was no error." }
      ]}
    ]}
  ]
} "fields": [
            { "name": "PartitionIndex", "type": "int32", "versions": "0+" },
            { "name": "ErrorCode", "type": "int16", "versions": "0+" }
          ]
        }
      ]
    }
  ]
}