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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.network.netty
import java.nio.ByteBuffer
import java.util.{HashMap => JHashMap, Map => JMap}
import scala.collection.JavaConverters._
import scala.concurrent.{Future, Promise}
import scala.reflect.ClassTag
import com.codahale.metrics.{Metric, MetricSet}
import org.apache.spark.{SecurityManager, SparkConf}
import org.apache.spark.internal.config
import org.apache.spark.network._
import org.apache.spark.network.buffer.{ManagedBuffer, NioManagedBuffer}
import org.apache.spark.network.client.{RpcResponseCallback, TransportClientBootstrap, TransportClientFactory}
import org.apache.spark.network.crypto.{AuthClientBootstrap, AuthServerBootstrap}
import org.apache.spark.network.server._
import org.apache.spark.network.shuffle.{BlockFetchingListener, DownloadFileManager, OneForOneBlockFetcher, RetryingBlockFetcher}
import org.apache.spark.network.shuffle.protocol.{UploadBlock, UploadBlockStream}
import org.apache.spark.network.util.JavaUtils
import org.apache.spark.serializer.JavaSerializer
import org.apache.spark.storage.{BlockId, StorageLevel}
import org.apache.spark.util.Utils
/**
* A BlockTransferService that uses Netty to fetch a set of blocks at time.
*/
private[spark] class NettyBlockTransferService(
conf: SparkConf,
securityManager: SecurityManager,
bindAddress: String,
override val hostName: String,
_port: Int,
numCores: Int)
extends BlockTransferService {
// TODO: Don't use Java serialization, use a more cross-version compatible serialization format.
private val serializer = new JavaSerializer(conf)
private val authEnabled = securityManager.isAuthenticationEnabled()
private val transportConf = SparkTransportConf.fromSparkConf(conf, "shuffle", numCores)
private[this] var transportContext: TransportContext = _
private[this] var server: TransportServer = _
private[this] var clientFactory: TransportClientFactory = _
private[this] var appId: String = _
override def init(blockDataManager: BlockDataManager): Unit = {
val rpcHandler = new NettyBlockRpcServer(conf.getAppId, serializer, blockDataManager)
var serverBootstrap: Option[TransportServerBootstrap] = None
var clientBootstrap: Option[TransportClientBootstrap] = None
if (authEnabled) {
serverBootstrap = Some(new AuthServerBootstrap(transportConf, securityManager))
clientBootstrap = Some(new AuthClientBootstrap(transportConf, conf.getAppId, securityManager))
}
transportContext = new TransportContext(transportConf, rpcHandler)
clientFactory = transportContext.createClientFactory(clientBootstrap.toSeq.asJava)
server = createServer(serverBootstrap.toList)
appId = conf.getAppId
logInfo(s"Server created on ${hostName}:${server.getPort}")
}
/** Creates and binds the TransportServer, possibly trying multiple ports. */
private def createServer(bootstraps: List[TransportServerBootstrap]): TransportServer = {
def startService(port: Int): (TransportServer, Int) = {
val server = transportContext.createServer(bindAddress, port, bootstraps.asJava)
(server, server.getPort)
}
Utils.startServiceOnPort(_port, startService, conf, getClass.getName)._1
}
override def shuffleMetrics(): MetricSet = {
require(server != null && clientFactory != null, "NettyBlockTransferServer is not initialized")
new MetricSet {
val allMetrics = new JHashMap[String, Metric]()
override def getMetrics: JMap[String, Metric] = {
allMetrics.putAll(clientFactory.getAllMetrics.getMetrics)
allMetrics.putAll(server.getAllMetrics.getMetrics)
allMetrics
}
}
}
override def fetchBlocks(
host: String,
port: Int,
execId: String,
blockIds: Array[String],
listener: BlockFetchingListener,
tempFileManager: DownloadFileManager): Unit = {
logTrace(s"Fetch blocks from $host:$port (executor id $execId)")
try {
val blockFetchStarter = new RetryingBlockFetcher.BlockFetchStarter {
override def createAndStart(blockIds: Array[String], listener: BlockFetchingListener) {
val client = clientFactory.createClient(host, port)
new OneForOneBlockFetcher(client, appId, execId, blockIds, listener,
transportConf, tempFileManager).start()
}
}
val maxRetries = transportConf.maxIORetries()
if (maxRetries > 0) {
// Note this Fetcher will correctly handle maxRetries == 0; we avoid it just in case there's
// a bug in this code. We should remove the if statement once we're sure of the stability.
new RetryingBlockFetcher(transportConf, blockFetchStarter, blockIds, listener).start()
} else {
blockFetchStarter.createAndStart(blockIds, listener)
}
} catch {
case e: Exception =>
logError("Exception while beginning fetchBlocks", e)
blockIds.foreach(listener.onBlockFetchFailure(_, e))
}
}
override def port: Int = server.getPort
override def uploadBlock(
hostname: String,
port: Int,
execId: String,
blockId: BlockId,
blockData: ManagedBuffer,
level: StorageLevel,
classTag: ClassTag[_]): Future[Unit] = {
val result = Promise[Unit]()
val client = clientFactory.createClient(hostname, port)
// StorageLevel and ClassTag are serialized as bytes using our JavaSerializer.
// Everything else is encoded using our binary protocol.
val metadata = JavaUtils.bufferToArray(serializer.newInstance().serialize((level, classTag)))
val asStream = blockData.size() > conf.get(config.MAX_REMOTE_BLOCK_SIZE_FETCH_TO_MEM)
val callback = new RpcResponseCallback {
override def onSuccess(response: ByteBuffer): Unit = {
logTrace(s"Successfully uploaded block $blockId${if (asStream) " as stream" else ""}")
result.success((): Unit)
}
override def onFailure(e: Throwable): Unit = {
logError(s"Error while uploading $blockId${if (asStream) " as stream" else ""}", e)
result.failure(e)
}
}
if (asStream) {
val streamHeader = new UploadBlockStream(blockId.name, metadata).toByteBuffer
client.uploadStream(new NioManagedBuffer(streamHeader), blockData, callback)
} else {
// Convert or copy nio buffer into array in order to serialize it.
val array = JavaUtils.bufferToArray(blockData.nioByteBuffer())
client.sendRpc(new UploadBlock(appId, execId, blockId.name, metadata, array).toByteBuffer,
callback)
}
result.future
}
override def close(): Unit = {
if (server != null) {
server.close()
}
if (clientFactory != null) {
clientFactory.close()
}
}
}