Github user gaborgsomogyi commented on a diff in the pull request: https://github.com/apache/spark/pull/22598#discussion_r231126695 --- Diff: core/src/main/scala/org/apache/spark/deploy/security/KafkaDelegationTokenProvider.scala --- @@ -0,0 +1,65 @@ +/* + * 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. + */ + +package org.apache.spark.deploy.security + +import scala.reflect.runtime.universe +import scala.util.control.NonFatal + +import org.apache.hadoop.conf.Configuration +import org.apache.hadoop.security.Credentials +import org.apache.hadoop.security.token.{Token, TokenIdentifier} + +import org.apache.spark.SparkConf +import org.apache.spark.internal.Logging +import org.apache.spark.internal.config.{KAFKA_BOOTSTRAP_SERVERS, KAFKA_SECURITY_PROTOCOL} +import org.apache.spark.util.Utils + +private[security] class KafkaDelegationTokenProvider --- End diff -- That will make `KafkaDelegationTokenProvider` more clean but has a couple of drawbacks: * Just move the reflection into `HadoopDelegationTokenManager` * Has to be copied when delegation token will be introduced in DStreams
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