{
  "apiKey": 1 1,
  "type":  "request",
  "listeners": ["zkBroker",  "broker",  "controller"],
  "name":  "FetchRequest",
  "validVersions":  "0-1315",
  "flexibleVersions":  "12+",
  "fields": [
    {  "name":  "ClusterId",  "type":  "string",  "versions":  "12+",  "nullableVersions":  "12+",  "default":  "null",
      "taggedVersions":  "12+",  "tag": 0 0,  "ignorable": true true,
      "about":  "The clusterId if known. This is used to validate metadata fetches prior to broker registration." },
    { "name": "ReplicaId",  },

// Deprecate this field. It is now in the ReplicaState. Also change the default value to -1.
	{ "name": "ReplicaId", "type":  "int32",  "versions":  "0+-14",  "entityTypedefault":  "brokerId-1",
      	  "aboutentityType": "The "brokerId", "about": "The broker ID of the follower, of -1 if this request is from a consumer."  },  
// Update ends

// New Field begin
        	{  "name":  "BrokerEpochReplicaState",  "type":  "int64ReplicaState",  "versionstaggedVersions": "1415+",  "ignorabletag": true 1,
           "aboutfields": "The epoch of this follower." },
// New Field End
    { "name": "MaxWaitMs", "type": "int32", "versions": "0+",
      "about": "The maximum time in milliseconds to wait for the response." },
    { "name": "MinBytes", "type": "int32", "versions": "0+",
      "about": "The minimum bytes to accumulate in the response." },
    { "name": "MaxBytes", "type": "int32", "versions": "3+", "default": "0x7fffffff", "ignorable": true [
	{ "name": "ReplicaId", "type": "int32", "versions": "15+", "default": "-1", "entityType": "brokerId",
	  "about": "The replica ID of the follower, of -1 if this request is from a consumer." },
	{ "name": "ReplicaEpoch", "type": "int64", "versions": "15+", "default": "-1",
	  "about": "The epoch of this follower." }
	]},
// New Field End

    { "name": "MaxWaitMs", "type": "int32", "versions": "0+",
      "about":  "The maximum time bytesin milliseconds to fetch.  See KIP-74 wait for cases where this limit may not be honored." the response." },
    {  "name":  "IsolationLevelMinBytes",  "type":  "int8int32",  "versions":  "4+", "default": "0", "ignorable": true,0+",
      "about":  "ThisThe settingminimum controlsbytes the to accumulate in the response." },
    { "name": "MaxBytes", "type": "int32", "versions": "3+", "default": "0x7fffffff", "ignorable": true,
      "about": "The maximum bytes to fetch.  See KIP-74 for cases where this limit may not be honored." },
    { "name": "IsolationLevel", "type": "int8", "versions": "4+", "default": "0", "ignorable": true,
      "about": "This setting controls the visibility of transactional records. Using READ_UNCOMMITTED (isolation_level = 0) makes all records visible. With READ_COMMITTED (isolation_level = 1), non-transactional and COMMITTED transactional records are visible. To be more concrete, READ_COMMITTED returns all data from offsets smaller than the current LSO (last stable offset), and enables the inclusion of the list of aborted transactions in the result, which allows consumers to discard ABORTED transactional records"  },
    {  "name":  "SessionId",  "type":  "int32",  "versions":  "7+",  "default":  "0",  "ignorable": true true,
      "about":  "The fetch session ID."  },
    {  "name":  "SessionEpoch",  "type":  "int32",  "versions":  "7+",  "default":  "-1",  "ignorable": true true,
      "about":  "The fetch session epoch, which is used for ordering requests in a session."  },
    {  "name":  "Topics",  "type":  "[]FetchTopic",  "versions":  "0+",
      "about":  "The topics to fetch.",  "fields": [
      {  "name":  "Topic",  "type":  "string",  "versions":  "0-12",  "entityType":  "topicName",  "ignorable":  "true",
        "about":  "The name of the topic to fetch."  },
      {  "name":  "TopicId",  "type":  "uuid",  "versions":  "13+",  "ignorable": true true,  "about":  "The unique topic ID"},
      {  "name":  "Partitions",  "type":  "[]FetchPartition",  "versions":  "0+",
        "about":  "The partitions to fetch.",  "fields": [
        {  "name":  "Partition",  "type":  "int32",  "versions":  "0+",
          "about":  "The partition index."  },
        {  "name":  "CurrentLeaderEpoch",  "type":  "int32",  "versions":  "9+",  "default":  "-1",  "ignorable": true true,
          "about":  "The current leader epoch of the partition."  },
        {  "name":  "FetchOffset",  "type":  "int64",  "versions":  "0+",
          "about":  "The message offset."  },
        {  "name":  "LastFetchedEpoch",  "type":  "int32",  "versions":  "12+",  "default":  "-1",  "ignorable": false false,
          "about":  "The epoch of the last fetched record or -1 if there is none"},
        {  "name":  "LogStartOffset",  "type":  "int64",  "versions":  "5+",  "default":  "-1",  "ignorable": true true,
          "about":  "The earliest available offset of the follower replica.  The field is only used when the request is sent by the follower."},
        {  "name":  "PartitionMaxBytes",  "type":  "int32",  "versions":  "0+",
          "about":  "The maximum bytes to fetch from this partition.  See KIP-74 for cases where this limit may not be honored."  }
      ]}
    ]},
    {  "name":  "ForgottenTopicsData",  "type":  "[]ForgottenTopic",  "versions":  "7+",  "ignorable": false false,
      "about":  "In an incremental fetch request, the partitions to remove.",  "fields": [
      {  "name":  "Topic",  "type":  "string",  "versions":  "7-12",  "entityType":  "topicName",  "ignorable": true true,
        "about":  "The topic name."  },
      {  "name":  "TopicId",  "type":  "uuid",  "versions":  "13+",  "ignorable": true true,  "about":  "The unique topic ID"},
      {  "name":  "Partitions",  "type":  "[]int32",  "versions":  "7+",
        "about":  "The partitions indexes to forget."  }
    ]},
    {  "name":  "RackId",  "type":  "string",  "versions":  "11+",  "default":  "",  "ignorable": true true,
      "about":  "Rack ID of the consumer making this request"}
  ]
} of the consumer making this request"}
  ]
}