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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": 18,
"type": "response",
"name": "ApiVersionsResponse",
// Version 1 adds throttle time to the response.
//
// Starting in version 2, on quota violation, brokers send out responses before throttling.
//
// Version 3 is the first flexible version. Tagged fields are only supported in the body but
// not in the header. The length of the header must not change in order to guarantee the
// backward compatibility.
//
// Starting from Apache Kafka 2.4 (KIP-511), ApiKeys field is populated with the supported
// versions of the ApiVersionsRequest when an UNSUPPORTED_VERSION error is returned.
"validVersions": "0-3",
"flexibleVersions": "3+",
"fields": [
{ "name": "ErrorCode", "type": "int16", "versions": "0+",
"about": "The top-level error code." },
{ "name": "ApiKeys", "type": "[]ApiVersion", "versions": "0+",
"about": "The APIs supported by the broker.", "fields": [
{ "name": "ApiKey", "type": "int16", "versions": "0+", "mapKey": true,
"about": "The API index." },
{ "name": "MinVersion", "type": "int16", "versions": "0+",
"about": "The minimum supported version, inclusive." },
{ "name": "MaxVersion", "type": "int16", "versions": "0+",
"about": "The maximum supported version, inclusive." }
]},
{ "name": "ThrottleTimeMs", "type": "int32", "versions": "1+", "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": "SupportedFeatures", "type": "[]SupportedFeatureKey", "ignorable": true,
"versions": "3+", "tag": 0, "taggedVersions": "3+",
"about": "Features supported by the broker.",
"fields": [
{ "name": "Name", "type": "string", "versions": "3+", "mapKey": true,
"about": "The name of the feature." },
{ "name": "MinVersion", "type": "int16", "versions": "3+",
"about": "The minimum supported version for the feature." },
{ "name": "MaxVersion", "type": "int16", "versions": "3+",
"about": "The maximum supported version for the feature." }
]
},
{ "name": "FinalizedFeaturesEpoch", "type": "int64", "versions": "3+",
"tag": 1, "taggedVersions": "3+", "default": "-1", "ignorable": true,
"about": "The monotonically increasing epoch for the finalized features information. Valid values are >= 0. A value of -1 is special and represents unknown epoch."},
{ "name": "FinalizedFeatures", "type": "[]FinalizedFeatureKey", "ignorable": true,
"versions": "3+", "tag": 2, "taggedVersions": "3+",
"about": "List of cluster-wide finalized features. The information is valid only if FinalizedFeaturesEpoch >= 0.",
"fields": [
{"name": "Name", "type": "string", "versions": "3+", "mapKey": true,
"about": "The name of the feature."},
{"name": "MaxVersionLevel", "type": "int16", "versions": "3+",
"about": "The cluster-wide finalized max version level for the feature."},
{"name": "MinVersionLevel", "type": "int16", "versions": "3+",
"about": "The cluster-wide finalized min version level for the feature."}
]
},
{ "name": "ZkMigrationReady", "type": "bool", "versions": "3+", "taggedVersions": "3+",
"tag": 3, "ignorable": true, "default": "false",
"about": "Set by a KRaft controller if the required configurations for ZK migration are present" }
]
}
