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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": 11,
  "type": "response",
  "name": "JoinGroupResponse",
  // Version 1 is the same as version 0.
  //
  // Version 2 adds throttle time.
  //
  // Starting in version 3, on quota violation, brokers send out responses before throttling.
  //
  // Starting in version 4, the client needs to issue a second request to join group
  // with assigned id.
  //
  // Version 5 is bumped to apply group.instance.id to identify member across restarts.
  //
  // Version 6 is the first flexible version.
  //
  // Starting from version 7, the broker sends back the Protocol Type to the client (KIP-559).
  //
  // Version 8 is the same as version 7.
  //
  // Version 9 adds the SkipAssignment field.
  "validVersions": "0-9",
  "flexibleVersions": "6+",
  "fields": [
    { "name": "ThrottleTimeMs", "type": "int32", "versions": "2+", "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": "0+",
      "about": "The error code, or 0 if there was no error." },
    { "name": "GenerationId", "type": "int32", "versions": "0+", "default": "-1",
      "about": "The generation ID of the group." },
    { "name": "ProtocolType", "type": "string", "versions": "7+",
      "nullableVersions": "7+", "default": "null", "ignorable": true,
      "about": "The group protocol name." },
    { "name": "ProtocolName", "type": "string", "versions": "0+", "nullableVersions": "7+",
      "about": "The group protocol selected by the coordinator." },
    { "name": "Leader", "type": "string", "versions": "0+",
      "about": "The leader of the group." },
    { "name": "SkipAssignment", "type": "bool", "versions": "9+", "default": "false",
      "about": "True if the leader must skip running the assignment." },
    { "name": "MemberId", "type": "string", "versions": "0+",
      "about": "The member ID assigned by the group coordinator." },
    { "name": "Members", "type": "[]JoinGroupResponseMember", "versions": "0+", "fields": [
      { "name": "MemberId", "type": "string", "versions": "0+",
        "about": "The group member ID." },
      { "name": "GroupInstanceId", "type": "string", "versions": "5+", "ignorable": true,
        "nullableVersions": "5+", "default": "null",
        "about": "The unique identifier of the consumer instance provided by end user." },
      { "name": "Metadata", "type": "bytes", "versions": "0+",
        "about": "The group member metadata." }
    ]}
  ]
}