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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
{
"apiKey": 3,
"type": "response",
"name": "MetadataResponse",
// Version 1 adds fields for the rack of each broker, the controller id, and
// whether or not the topic is internal.
//
// Version 2 adds the cluster ID field.
//
// Version 3 adds the throttle time.
//
// Version 4 is the same as version 3.
//
// Version 5 adds a per-partition offline_replicas field. This field specifies
// the list of replicas that are offline.
//
// Starting in version 6, on quota violation, brokers send out responses before throttling.
//
// Version 7 adds the leader epoch to the partition metadata.
//
// Starting in version 8, brokers can send authorized operations for topic and cluster.
//
// Version 9 is the first flexible version.
//
// Version 10 adds topicId.
//
// Version 11 deprecates ClusterAuthorizedOperations. This is now exposed
// by the DescribeCluster API (KIP-700).
// Version 12 supports topicId.
"validVersions": "0-12",
"flexibleVersions": "9+",
"fields": [
{ "name": "ThrottleTimeMs", "type": "int32", "versions": "3+", "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": "Brokers", "type": "[]MetadataResponseBroker", "versions": "0+",
"about": "Each broker in the response.", "fields": [
{ "name": "NodeId", "type": "int32", "versions": "0+", "mapKey": true, "entityType": "brokerId",
"about": "The broker ID." },
{ "name": "Host", "type": "string", "versions": "0+",
"about": "The broker hostname." },
{ "name": "Port", "type": "int32", "versions": "0+",
"about": "The broker port." },
{ "name": "Rack", "type": "string", "versions": "1+", "nullableVersions": "1+", "ignorable": true, "default": "null",
"about": "The rack of the broker, or null if it has not been assigned to a rack." }
]},
{ "name": "ClusterId", "type": "string", "nullableVersions": "2+", "versions": "2+", "ignorable": true, "default": "null",
"about": "The cluster ID that responding broker belongs to." },
{ "name": "ControllerId", "type": "int32", "versions": "1+", "default": "-1", "ignorable": true, "entityType": "brokerId",
"about": "The ID of the controller broker." },
{ "name": "Topics", "type": "[]MetadataResponseTopic", "versions": "0+",
"about": "Each topic in the response.", "fields": [
{ "name": "ErrorCode", "type": "int16", "versions": "0+",
"about": "The topic error, or 0 if there was no error." },
{ "name": "Name", "type": "string", "versions": "0+", "mapKey": true, "entityType": "topicName", "nullableVersions": "12+",
"about": "The topic name." },
{ "name": "TopicId", "type": "uuid", "versions": "10+", "ignorable": true, "about": "The topic id." },
{ "name": "IsInternal", "type": "bool", "versions": "1+", "default": "false", "ignorable": true,
"about": "True if the topic is internal." },
{ "name": "Partitions", "type": "[]MetadataResponsePartition", "versions": "0+",
"about": "Each partition in the topic.", "fields": [
{ "name": "ErrorCode", "type": "int16", "versions": "0+",
"about": "The partition error, or 0 if there was no error." },
{ "name": "PartitionIndex", "type": "int32", "versions": "0+",
"about": "The partition index." },
{ "name": "LeaderId", "type": "int32", "versions": "0+", "entityType": "brokerId",
"about": "The ID of the leader broker." },
{ "name": "LeaderEpoch", "type": "int32", "versions": "7+", "default": "-1", "ignorable": true,
"about": "The leader epoch of this partition." },
{ "name": "ReplicaNodes", "type": "[]int32", "versions": "0+", "entityType": "brokerId",
"about": "The set of all nodes that host this partition." },
{ "name": "IsrNodes", "type": "[]int32", "versions": "0+", "entityType": "brokerId",
"about": "The set of nodes that are in sync with the leader for this partition." },
{ "name": "OfflineReplicas", "type": "[]int32", "versions": "5+", "ignorable": true, "entityType": "brokerId",
"about": "The set of offline replicas of this partition." }
]},
{ "name": "TopicAuthorizedOperations", "type": "int32", "versions": "8+", "default": "-2147483648",
"about": "32-bit bitfield to represent authorized operations for this topic." }
]},
{ "name": "ClusterAuthorizedOperations", "type": "int32", "versions": "8-10", "default": "-2147483648",
"about": "32-bit bitfield to represent authorized operations for this cluster." }
]
}
