Github user henryr commented on a diff in the pull request: https://github.com/apache/spark/pull/21068#discussion_r181907395 --- Diff: resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocatorBlacklistTracker.scala --- @@ -0,0 +1,155 @@ +/* + * 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.yarn + +import scala.collection.JavaConverters._ +import scala.collection.mutable.HashMap + +import org.apache.hadoop.yarn.client.api.AMRMClient +import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest + +import org.apache.spark.SparkConf +import org.apache.spark.deploy.yarn.config._ +import org.apache.spark.internal.Logging +import org.apache.spark.internal.config._ +import org.apache.spark.util.{Clock, SystemClock, Utils} + +private[spark] class YarnAllocatorBlacklistTracker( + sparkConf: SparkConf, + amClient: AMRMClient[ContainerRequest], + failureWithinTimeIntervalTracker: FailureWithinTimeIntervalTracker) + extends Logging { + + private val DEFAULT_TIMEOUT = "1h" + + private val BLACKLIST_TIMEOUT_MILLIS = + sparkConf.get(BLACKLIST_TIMEOUT_CONF).getOrElse(Utils.timeStringAsMs(DEFAULT_TIMEOUT)) + + private val IS_YARN_ALLOCATION_BLACKLIST_ENABLED = + sparkConf.get(YARN_ALLOCATION_BLACKLIST_ENABLED).getOrElse(false) + + private val BLACKLIST_MAX_FAILED_EXEC_PER_NODE = sparkConf.get(MAX_FAILED_EXEC_PER_NODE) + + private val BLACKLIST_SIZE_LIMIT = sparkConf.get(YARN_BLACKLIST_SIZE_LIMIT) + + private val BLACKLIST_SIZE_DEFAULT_WEIGHT = sparkConf.get(YARN_BLACKLIST_SIZE_DEFAULT_WEIGHT) + + private var clock: Clock = new SystemClock + + private val allocationBlacklistedNodesWithExpiry = new HashMap[String, Long]() + + private var currentBlacklistedYarnNodes = Set.empty[String] + + private var schedulerBlacklistedNodesWithExpiry = Map.empty[String, Long] + + private var numClusterNodes = (Int.MaxValue / BLACKLIST_SIZE_DEFAULT_WEIGHT).toInt + + def setNumClusterNodes(numClusterNodes: Int): Unit = { + this.numClusterNodes = numClusterNodes + } + + /** + * Use a different clock. This is mainly used for testing. + */ + def setClock(newClock: Clock): Unit = { + clock = newClock + } + + def handleResourceAllocationFailure(hostOpt: Option[String]): Unit = { + hostOpt match { + case Some(hostname) => + // failures on a already blacklisted nodes are not even tracked + // otherwise such failures could shutdown the application + // as resource requests are asynchronous + // and a late failure response could exceed MAX_EXECUTOR_FAILURES + if (!schedulerBlacklistedNodesWithExpiry.contains(hostname) && + !allocationBlacklistedNodesWithExpiry.contains(hostname)) { + failureWithinTimeIntervalTracker.registerFailureOnHost(hostname) + updateAllocationBlacklistedNodes(hostname) + } + case None => + failureWithinTimeIntervalTracker.registerExecutorFailure() + } + } + + private def updateAllocationBlacklistedNodes(hostname: String): Unit = { + if (IS_YARN_ALLOCATION_BLACKLIST_ENABLED) { + val failuresOnHost = failureWithinTimeIntervalTracker.getNumExecutorFailuresOnHost(hostname) + if (failuresOnHost > BLACKLIST_MAX_FAILED_EXEC_PER_NODE) { + logInfo("blacklisting host as YARN allocation failed: %s".format(hostname)) --- End diff -- log msg could include the number of failures
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