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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.
*/
package org.apache.spark.storage
import scala.collection.mutable
import org.apache.spark.SparkConf
import org.apache.spark.annotation.DeveloperApi
import org.apache.spark.scheduler._
/**
* :: DeveloperApi ::
* A SparkListener that maintains executor storage status.
*
* This class is thread-safe (unlike JobProgressListener)
*/
@DeveloperApi
class StorageStatusListener(conf: SparkConf) extends SparkListener {
// This maintains only blocks that are cached (i.e. storage level is not StorageLevel.NONE)
private[storage] val executorIdToStorageStatus = mutable.Map[String, StorageStatus]()
private[storage] val deadExecutorStorageStatus = new mutable.ListBuffer[StorageStatus]()
private[this] val retainedDeadExecutors = conf.getInt("spark.ui.retainedDeadExecutors", 100)
def storageStatusList: Seq[StorageStatus] = synchronized {
executorIdToStorageStatus.values.toSeq
}
def deadStorageStatusList: Seq[StorageStatus] = synchronized {
deadExecutorStorageStatus.toSeq
}
/** Update storage status list to reflect updated block statuses */
private def updateStorageStatus(execId: String, updatedBlocks: Seq[(BlockId, BlockStatus)]) {
executorIdToStorageStatus.get(execId).foreach { storageStatus =>
updatedBlocks.foreach { case (blockId, updatedStatus) =>
if (updatedStatus.storageLevel == StorageLevel.NONE) {
storageStatus.removeBlock(blockId)
} else {
storageStatus.updateBlock(blockId, updatedStatus)
}
}
}
}
/** Update storage status list to reflect the removal of an RDD from the cache */
private def updateStorageStatus(unpersistedRDDId: Int) {
storageStatusList.foreach { storageStatus =>
storageStatus.rddBlocksById(unpersistedRDDId).foreach { case (blockId, _) =>
storageStatus.removeBlock(blockId)
}
}
}
override def onTaskEnd(taskEnd: SparkListenerTaskEnd): Unit = synchronized {
val info = taskEnd.taskInfo
val metrics = taskEnd.taskMetrics
if (info != null && metrics != null) {
val updatedBlocks = metrics.updatedBlockStatuses
if (updatedBlocks.length > 0) {
updateStorageStatus(info.executorId, updatedBlocks)
}
}
}
override def onUnpersistRDD(unpersistRDD: SparkListenerUnpersistRDD): Unit = synchronized {
updateStorageStatus(unpersistRDD.rddId)
}
override def onBlockManagerAdded(blockManagerAdded: SparkListenerBlockManagerAdded) {
synchronized {
val blockManagerId = blockManagerAdded.blockManagerId
val executorId = blockManagerId.executorId
val maxMem = blockManagerAdded.maxMem
val storageStatus = new StorageStatus(blockManagerId, maxMem)
executorIdToStorageStatus(executorId) = storageStatus
}
}
override def onBlockManagerRemoved(blockManagerRemoved: SparkListenerBlockManagerRemoved) {
synchronized {
val executorId = blockManagerRemoved.blockManagerId.executorId
executorIdToStorageStatus.remove(executorId).foreach { status =>
deadExecutorStorageStatus += status
}
if (deadExecutorStorageStatus.size > retainedDeadExecutors) {
deadExecutorStorageStatus.trimStart(1)
}
}
}
}
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