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{
  "apiKey": 57,
  "type": "request",
  "name": "BrokerRegistrationRequest",
  "validVersions": "0",
  "flexibleVersions": "0+",
  "fields": [
    { "name": "BrokerId", "type": "int32", "versions": "0+",
      "about": "The broker ID." },
	{ "name": "ClusterId", "type": "uuid", "versions": "0+",
	  "about": "The cluster id of the broker process." },
	{ "name": "IncarnationId", "type": "uuid", "versions": "0+",
	  "about": "The incarnation id of the broker process." },
    { "name": "CurrentMetadataOffset", "type": "int64", "versions": "0+",
      "about": "The highest metadata offset which the broker has reached." },
    { "name": "Listeners", "type": "[]Listener",
      "about": "The listeners of this broker", "versions": "0+", "fields": [
        { "name": "Name", "type": "string", "versions": "0+", "mapKey": true,
          "about": "The name of the endpoint." },
        { "name": "Host", "type": "string", "versions": "0+",
          "about": "The hostname." },
        { "name": "Port", "type": "int32uint16", "versions": "0+",
          "about": "The port." },
        { "name": "SecurityProtocol", "type": "int16", "versions": "0+",
          "about": "The security protocol." }
      ]
    { "name": "Features", "type": "[]Feature",
      "about": "The features on this broker", "versions": "0+", "fields": [
        { "name": "Name", "type": "string", "versions": "0+", "mapKey": true,
          "about": "The feature name." }
        { "name": "MinSupportedVersion", "type": "int16", "versions": "0+",
          "about": "The minimum supported feature level." },
        { "name": "MaxSupportedVersion", "type": "int16", "versions": "0+",
          "about": "The maximum supported feature level." }
      ]
    },
    { "name": "Rack", "type": "string", "versions": "0+", "nullableVersions": "0+",
      "about": "The rack which this broker is in." }
  ]
}

{
  "apiKey": 57,
  "type": "response",
  "name": "BrokerRegistrationResponse",
  "validVersions": "0",
  "flexibleVersions": "0+",
  "fields": [
    { "name": "ThrottleTimeMs", "type": "int32", "versions": "0+",
      "about": "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": "0+",
      "about": "The error code, or 0 if there was no error." },
    { "name": "BrokerEpoch", "type": "int64", "versions": "0+", "default": "-1",
      "about": "The broker's assigned epoch, or -1 if none was assigned." }
  ]
}

{
  "apiKey": 0,
  "type": "metadata",
  "name": "RegisterBrokerRecord"
,
  "validVersions": "0",
  "fields": [
	{ "name": "Id", "type": "int32", "versions": "0+",
	  "about": "The broker id." },
	{ "name": "IncarnationId", "type": "uuid", "versions": "0+",
	  "about": "The incarnation id of the broker process." },
	{ "name": "BrokerEpoch", "type": "int64", "versions": "0+",
	  "about": "The broker epoch assigned by the controller." },
	{ "name": "EndPoints", "type": "[]BrokerEndpoint", "versions": "0+", "nullableVersions": "0+",
	  "about": "The endpoints that can be used to communicate with this broker.", "fields": [
		{ "name": "Name", "type": "string", "versions": "0+", "mapKey": true,
		  "about": "The name of the endpoint." },
		{ "name": "Host", "type": "string", "versions": "0+",
		  "about": "The hostname." },
		{ "name": "Port", "type": "int32uint16", "versions": "0+",
		  "about": "The port." },
		{ "name": "SecurityProtocol", "type": "int16", "versions": "0+",
		  "about": "The security protocol." }
	]},
	{ "name": "Features", "type": "[]BrokerFeature", "versions": "0+", "nullableVersions": "0+",
	  "about": "The features that this broker supports.", "fields": [
		{ "name": "Name", "type": "string", "versions": "0+", "mapKey": true,
		  "about": "The name of the feature." },
		{ "name": "MinVersion", "type": "int16", "versions": "0+",
		  "about": "The minimum feature level that this broker supports." },
		{ "name": "MaxVersion", "type": "int16", "versions": "0+",
		  "about": "The maximum feature level that this broker supports." }
	]},
	{ "name": "Rack", "type": "string", "versions": "0+", "nullableVersions": "0+",
	  "about": "The broker rack." }
  ]
}