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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.concurrent.{ExecutionContext, Future}
import org.apache.spark.{Logging, MapOutputTracker, SparkEnv}
import org.apache.spark.rpc.{RpcCallContext, RpcEnv, ThreadSafeRpcEndpoint}
import org.apache.spark.storage.BlockManagerMessages._
import org.apache.spark.util.{ThreadUtils, Utils}
/**
* An RpcEndpoint to take commands from the master to execute options. For example,
* this is used to remove blocks from the slave's BlockManager.
*/
private[storage]
class BlockManagerSlaveEndpoint(
override val rpcEnv: RpcEnv,
blockManager: BlockManager,
mapOutputTracker: MapOutputTracker)
extends ThreadSafeRpcEndpoint with Logging {
private val asyncThreadPool =
ThreadUtils.newDaemonCachedThreadPool("block-manager-slave-async-thread-pool")
private implicit val asyncExecutionContext = ExecutionContext.fromExecutorService(asyncThreadPool)
// Operations that involve removing blocks may be slow and should be done asynchronously
override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
case RemoveBlock(blockId) =>
doAsync[Boolean]("removing block " + blockId, context) {
blockManager.removeBlock(blockId)
true
}
case RemoveRdd(rddId) =>
doAsync[Int]("removing RDD " + rddId, context) {
blockManager.removeRdd(rddId)
}
case RemoveShuffle(shuffleId) =>
doAsync[Boolean]("removing shuffle " + shuffleId, context) {
if (mapOutputTracker != null) {
mapOutputTracker.unregisterShuffle(shuffleId)
}
SparkEnv.get.shuffleManager.unregisterShuffle(shuffleId)
}
case RemoveBroadcast(broadcastId, _) =>
doAsync[Int]("removing broadcast " + broadcastId, context) {
blockManager.removeBroadcast(broadcastId, tellMaster = true)
}
case GetBlockStatus(blockId, _) =>
context.reply(blockManager.getStatus(blockId))
case GetMatchingBlockIds(filter, _) =>
context.reply(blockManager.getMatchingBlockIds(filter))
case TriggerThreadDump =>
context.reply(Utils.getThreadDump())
}
private def doAsync[T](actionMessage: String, context: RpcCallContext)(body: => T) {
val future = Future {
logDebug(actionMessage)
body
}
future.onSuccess { case response =>
logDebug("Done " + actionMessage + ", response is " + response)
context.reply(response)
logDebug("Sent response: " + response + " to " + context.senderAddress)
}
future.onFailure { case t: Throwable =>
logError("Error in " + actionMessage, t)
context.sendFailure(t)
}
}
override def onStop(): Unit = {
asyncThreadPool.shutdownNow()
}
}
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