Github user jiangxb1987 commented on a diff in the pull request: https://github.com/apache/spark/pull/19717#discussion_r153216292 --- Diff: resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/ConfigurationUtils.scala --- @@ -0,0 +1,50 @@ +/* + * 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.k8s + +import org.apache.spark.SparkConf + +private[spark] object ConfigurationUtils { + + /** + * Extract and parse Spark configuration properties with a given name prefix and + * return the result as a Map. Keys must not have more than one value. + * + * @param sparkConf Spark configuration + * @param prefix the given property name prefix + * @return a Map storing the configuration property keys and values + */ + def parsePrefixedKeyValuePairs( + sparkConf: SparkConf, + prefix: String): Map[String, String] = { + sparkConf.getAllWithPrefix(prefix).toMap + } + + def requireSecondIfFirstIsDefined( --- End diff -- This function is never used.
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