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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": "request",
"listeners": ["zkBroker", "broker"],
"name": "JoinGroupRequest",
// Version 1 adds RebalanceTimeoutMs.
//
// Version 2 and 3 are the same as version 1.
//
// Starting from version 4, the client needs to issue a second request to join group
//
// Starting from version 5, we add a new field called groupInstanceId to indicate member identity across restarts.
// with assigned id.
//
// Version 6 is the first flexible version.
//
// Version 7 is the same as version 6.
//
// Version 8 adds the Reason field (KIP-800).
//
// Version 9 is the same as version 8.
"validVersions": "0-9",
"flexibleVersions": "6+",
"fields": [
{ "name": "GroupId", "type": "string", "versions": "0+", "entityType": "groupId",
"about": "The group identifier." },
{ "name": "SessionTimeoutMs", "type": "int32", "versions": "0+",
"about": "The coordinator considers the consumer dead if it receives no heartbeat after this timeout in milliseconds." },
// Note: if RebalanceTimeoutMs is not present, SessionTimeoutMs should be
// used instead. The default of -1 here is just intended as a placeholder.
{ "name": "RebalanceTimeoutMs", "type": "int32", "versions": "1+", "default": "-1", "ignorable": true,
"about": "The maximum time in milliseconds that the coordinator will wait for each member to rejoin when rebalancing the group." },
{ "name": "MemberId", "type": "string", "versions": "0+",
"about": "The member id assigned by the group coordinator." },
{ "name": "GroupInstanceId", "type": "string", "versions": "5+",
"nullableVersions": "5+", "default": "null",
"about": "The unique identifier of the consumer instance provided by end user." },
{ "name": "ProtocolType", "type": "string", "versions": "0+",
"about": "The unique name the for class of protocols implemented by the group we want to join." },
{ "name": "Protocols", "type": "[]JoinGroupRequestProtocol", "versions": "0+",
"about": "The list of protocols that the member supports.", "fields": [
{ "name": "Name", "type": "string", "versions": "0+", "mapKey": true,
"about": "The protocol name." },
{ "name": "Metadata", "type": "bytes", "versions": "0+",
"about": "The protocol metadata." }
]},
{ "name": "Reason", "type": "string", "versions": "8+", "nullableVersions": "8+", "default": "null", "ignorable": true,
"about": "The reason why the member (re-)joins the group." }
]
}