spark YarnClusterSchedulerBackend 源码
spark YarnClusterSchedulerBackend 代码
文件路径：/resource-managers/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClusterSchedulerBackend.scala
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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
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* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.spark.scheduler.cluster
import org.apache.spark.SparkContext
import org.apache.spark.deploy.yarn.ApplicationMaster
import org.apache.spark.scheduler.TaskSchedulerImpl
import org.apache.spark.util.YarnContainerInfoHelper
private[spark] class YarnClusterSchedulerBackend(
scheduler: TaskSchedulerImpl,
sc: SparkContext)
extends YarnSchedulerBackend(scheduler, sc) {
override def start(): Unit = {
val attemptId = ApplicationMaster.getAttemptId
bindToYarn(attemptId.getApplicationId(), Some(attemptId))
super.start()
totalExpectedExecutors = SchedulerBackendUtils.getInitialTargetExecutorNumber(sc.conf)
startBindings()
}
override def getDriverLogUrls: Option[Map[String, String]] = {
YarnContainerInfoHelper.getLogUrls(sc.hadoopConfiguration, container = None)
}
override def getDriverAttributes: Option[Map[String, String]] = {
YarnContainerInfoHelper.getAttributes(sc.hadoopConfiguration, container = None)
}
}
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