MAPREDUCE-4049. Experimental api to allow for alternate shuffle plugins. Contributed by Anver BenHanoch.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1418173 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Arun Murthy
parent
df2fb006b2
commit
b096f61fe2
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@ -11,6 +11,9 @@ Trunk (Unreleased)
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MAPREDUCE-2669. Add new examples for Mean, Median, and Standard Deviation.
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(Plamen Jeliazkov via shv)
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MAPREDUCE-4049. Experimental api to allow for alternate shuffle plugins.
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(Avner BenHanoch via acmurthy)
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IMPROVEMENTS
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MAPREDUCE-3787. [Gridmix] Optimize job monitoring and STRESS mode for
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@ -340,6 +340,7 @@ public class ReduceTask extends Task {
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// Initialize the codec
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codec = initCodec();
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RawKeyValueIterator rIter = null;
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ShuffleConsumerPlugin shuffleConsumerPlugin = null;
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boolean isLocal = false;
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// local if
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@ -358,8 +359,14 @@ public class ReduceTask extends Task {
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(null != combinerClass) ?
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new CombineOutputCollector(reduceCombineOutputCounter, reporter, conf) : null;
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Shuffle shuffle =
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new Shuffle(getTaskID(), job, FileSystem.getLocal(job), umbilical,
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Class<? extends ShuffleConsumerPlugin> clazz =
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job.getClass(MRConfig.SHUFFLE_CONSUMER_PLUGIN, Shuffle.class, ShuffleConsumerPlugin.class);
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shuffleConsumerPlugin = ReflectionUtils.newInstance(clazz, job);
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LOG.info("Using ShuffleConsumerPlugin: " + shuffleConsumerPlugin);
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ShuffleConsumerPlugin.Context shuffleContext =
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new ShuffleConsumerPlugin.Context(getTaskID(), job, FileSystem.getLocal(job), umbilical,
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super.lDirAlloc, reporter, codec,
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combinerClass, combineCollector,
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spilledRecordsCounter, reduceCombineInputCounter,
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@ -368,7 +375,8 @@ public class ReduceTask extends Task {
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mergedMapOutputsCounter,
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taskStatus, copyPhase, sortPhase, this,
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mapOutputFile);
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rIter = shuffle.run();
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shuffleConsumerPlugin.init(shuffleContext);
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rIter = shuffleConsumerPlugin.run();
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} else {
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// local job runner doesn't have a copy phase
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copyPhase.complete();
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@ -399,6 +407,10 @@ public class ReduceTask extends Task {
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runOldReducer(job, umbilical, reporter, rIter, comparator,
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keyClass, valueClass);
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}
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if (shuffleConsumerPlugin != null) {
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shuffleConsumerPlugin.close();
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}
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done(umbilical, reporter);
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}
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@ -0,0 +1,168 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.mapred;
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import java.io.IOException;
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import org.apache.hadoop.mapred.Task.CombineOutputCollector;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.LocalDirAllocator;
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import org.apache.hadoop.io.compress.CompressionCodec;
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import org.apache.hadoop.util.Progress;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.classification.InterfaceStability;
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/**
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* ShuffleConsumerPlugin for serving Reducers. It may shuffle MOF files from
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* either the built-in ShuffleHandler or from a 3rd party AuxiliaryService.
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*
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*/
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@InterfaceAudience.LimitedPrivate("mapreduce")
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@InterfaceStability.Unstable
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public interface ShuffleConsumerPlugin<K, V> {
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public void init(Context<K, V> context);
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public RawKeyValueIterator run() throws IOException, InterruptedException;
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public void close();
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@InterfaceAudience.LimitedPrivate("mapreduce")
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@InterfaceStability.Unstable
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public static class Context<K,V> {
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private final org.apache.hadoop.mapreduce.TaskAttemptID reduceId;
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private final JobConf jobConf;
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private final FileSystem localFS;
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private final TaskUmbilicalProtocol umbilical;
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private final LocalDirAllocator localDirAllocator;
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private final Reporter reporter;
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private final CompressionCodec codec;
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private final Class<? extends Reducer> combinerClass;
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private final CombineOutputCollector<K, V> combineCollector;
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private final Counters.Counter spilledRecordsCounter;
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private final Counters.Counter reduceCombineInputCounter;
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private final Counters.Counter shuffledMapsCounter;
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private final Counters.Counter reduceShuffleBytes;
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private final Counters.Counter failedShuffleCounter;
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private final Counters.Counter mergedMapOutputsCounter;
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private final TaskStatus status;
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private final Progress copyPhase;
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private final Progress mergePhase;
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private final Task reduceTask;
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private final MapOutputFile mapOutputFile;
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public Context(org.apache.hadoop.mapreduce.TaskAttemptID reduceId,
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JobConf jobConf, FileSystem localFS,
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TaskUmbilicalProtocol umbilical,
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LocalDirAllocator localDirAllocator,
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Reporter reporter, CompressionCodec codec,
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Class<? extends Reducer> combinerClass,
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CombineOutputCollector<K,V> combineCollector,
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Counters.Counter spilledRecordsCounter,
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Counters.Counter reduceCombineInputCounter,
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Counters.Counter shuffledMapsCounter,
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Counters.Counter reduceShuffleBytes,
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Counters.Counter failedShuffleCounter,
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Counters.Counter mergedMapOutputsCounter,
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TaskStatus status, Progress copyPhase, Progress mergePhase,
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Task reduceTask, MapOutputFile mapOutputFile) {
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this.reduceId = reduceId;
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this.jobConf = jobConf;
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this.localFS = localFS;
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this. umbilical = umbilical;
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this.localDirAllocator = localDirAllocator;
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this.reporter = reporter;
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this.codec = codec;
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this.combinerClass = combinerClass;
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this.combineCollector = combineCollector;
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this.spilledRecordsCounter = spilledRecordsCounter;
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this.reduceCombineInputCounter = reduceCombineInputCounter;
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this.shuffledMapsCounter = shuffledMapsCounter;
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this.reduceShuffleBytes = reduceShuffleBytes;
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this.failedShuffleCounter = failedShuffleCounter;
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this.mergedMapOutputsCounter = mergedMapOutputsCounter;
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this.status = status;
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this.copyPhase = copyPhase;
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this.mergePhase = mergePhase;
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this.reduceTask = reduceTask;
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this.mapOutputFile = mapOutputFile;
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}
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public org.apache.hadoop.mapreduce.TaskAttemptID getReduceId() {
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return reduceId;
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}
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public JobConf getJobConf() {
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return jobConf;
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}
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public FileSystem getLocalFS() {
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return localFS;
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}
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public TaskUmbilicalProtocol getUmbilical() {
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return umbilical;
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}
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public LocalDirAllocator getLocalDirAllocator() {
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return localDirAllocator;
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}
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public Reporter getReporter() {
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return reporter;
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}
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public CompressionCodec getCodec() {
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return codec;
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}
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public Class<? extends Reducer> getCombinerClass() {
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return combinerClass;
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}
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public CombineOutputCollector<K, V> getCombineCollector() {
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return combineCollector;
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}
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public Counters.Counter getSpilledRecordsCounter() {
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return spilledRecordsCounter;
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}
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public Counters.Counter getReduceCombineInputCounter() {
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return reduceCombineInputCounter;
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}
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public Counters.Counter getShuffledMapsCounter() {
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return shuffledMapsCounter;
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}
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public Counters.Counter getReduceShuffleBytes() {
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return reduceShuffleBytes;
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}
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public Counters.Counter getFailedShuffleCounter() {
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return failedShuffleCounter;
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}
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public Counters.Counter getMergedMapOutputsCounter() {
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return mergedMapOutputsCounter;
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}
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public TaskStatus getStatus() {
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return status;
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}
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public Progress getCopyPhase() {
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return copyPhase;
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}
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public Progress getMergePhase() {
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return mergePhase;
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}
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public Task getReduceTask() {
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return reduceTask;
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}
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public MapOutputFile getMapOutputFile() {
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return mapOutputFile;
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}
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} // end of public static class Context<K,V>
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}
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@ -85,6 +85,9 @@ public interface MRConfig {
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public static final boolean SHUFFLE_SSL_ENABLED_DEFAULT = false;
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public static final String SHUFFLE_CONSUMER_PLUGIN =
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"mapreduce.job.reduce.shuffle.consumer.plugin.class";
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/**
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* Configuration key to enable/disable IFile readahead.
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*/
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@ -34,73 +34,63 @@ import org.apache.hadoop.mapred.Task;
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import org.apache.hadoop.mapred.Task.CombineOutputCollector;
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import org.apache.hadoop.mapred.TaskStatus;
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import org.apache.hadoop.mapred.TaskUmbilicalProtocol;
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import org.apache.hadoop.mapred.ShuffleConsumerPlugin;
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import org.apache.hadoop.mapreduce.MRJobConfig;
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import org.apache.hadoop.mapreduce.TaskAttemptID;
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import org.apache.hadoop.util.Progress;
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@InterfaceAudience.Private
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@InterfaceAudience.LimitedPrivate("mapreduce")
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@InterfaceStability.Unstable
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@SuppressWarnings({"unchecked", "rawtypes"})
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public class Shuffle<K, V> implements ExceptionReporter {
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public class Shuffle<K, V> implements ShuffleConsumerPlugin<K, V>, ExceptionReporter {
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private static final int PROGRESS_FREQUENCY = 2000;
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private static final int MAX_EVENTS_TO_FETCH = 10000;
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private static final int MIN_EVENTS_TO_FETCH = 100;
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private static final int MAX_RPC_OUTSTANDING_EVENTS = 3000000;
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private final TaskAttemptID reduceId;
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private final JobConf jobConf;
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private final Reporter reporter;
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private final ShuffleClientMetrics metrics;
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private final TaskUmbilicalProtocol umbilical;
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private ShuffleConsumerPlugin.Context context;
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private TaskAttemptID reduceId;
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private JobConf jobConf;
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private Reporter reporter;
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private ShuffleClientMetrics metrics;
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private TaskUmbilicalProtocol umbilical;
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private final ShuffleScheduler<K,V> scheduler;
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private final MergeManager<K, V> merger;
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private ShuffleScheduler<K,V> scheduler;
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private MergeManager<K, V> merger;
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private Throwable throwable = null;
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private String throwingThreadName = null;
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private final Progress copyPhase;
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private final TaskStatus taskStatus;
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private final Task reduceTask; //Used for status updates
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public Shuffle(TaskAttemptID reduceId, JobConf jobConf, FileSystem localFS,
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TaskUmbilicalProtocol umbilical,
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LocalDirAllocator localDirAllocator,
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Reporter reporter,
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CompressionCodec codec,
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Class<? extends Reducer> combinerClass,
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CombineOutputCollector<K,V> combineCollector,
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Counters.Counter spilledRecordsCounter,
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Counters.Counter reduceCombineInputCounter,
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Counters.Counter shuffledMapsCounter,
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Counters.Counter reduceShuffleBytes,
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Counters.Counter failedShuffleCounter,
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Counters.Counter mergedMapOutputsCounter,
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TaskStatus status,
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Progress copyPhase,
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Progress mergePhase,
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Task reduceTask,
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MapOutputFile mapOutputFile) {
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this.reduceId = reduceId;
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this.jobConf = jobConf;
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this.umbilical = umbilical;
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this.reporter = reporter;
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private Progress copyPhase;
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private TaskStatus taskStatus;
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private Task reduceTask; //Used for status updates
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@Override
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public void init(ShuffleConsumerPlugin.Context context) {
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this.context = context;
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this.reduceId = context.getReduceId();
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this.jobConf = context.getJobConf();
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this.umbilical = context.getUmbilical();
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this.reporter = context.getReporter();
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this.metrics = new ShuffleClientMetrics(reduceId, jobConf);
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this.copyPhase = copyPhase;
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this.taskStatus = status;
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this.reduceTask = reduceTask;
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this.copyPhase = context.getCopyPhase();
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this.taskStatus = context.getStatus();
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this.reduceTask = context.getReduceTask();
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scheduler =
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new ShuffleScheduler<K,V>(jobConf, status, this, copyPhase,
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shuffledMapsCounter,
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reduceShuffleBytes, failedShuffleCounter);
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merger = new MergeManager<K, V>(reduceId, jobConf, localFS,
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localDirAllocator, reporter, codec,
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combinerClass, combineCollector,
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spilledRecordsCounter,
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reduceCombineInputCounter,
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mergedMapOutputsCounter,
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this, mergePhase, mapOutputFile);
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new ShuffleScheduler<K,V>(jobConf, taskStatus, this, copyPhase,
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context.getShuffledMapsCounter(),
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context.getReduceShuffleBytes(), context.getFailedShuffleCounter());
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merger = new MergeManager<K, V>(reduceId, jobConf, context.getLocalFS(),
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context.getLocalDirAllocator(), reporter, context.getCodec(),
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context.getCombinerClass(), context.getCombineCollector(),
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context.getSpilledRecordsCounter(),
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context.getReduceCombineInputCounter(),
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context.getMergedMapOutputsCounter(),
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this, context.getMergePhase(), context.getMapOutputFile());
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}
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@Override
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public RawKeyValueIterator run() throws IOException, InterruptedException {
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// Scale the maximum events we fetch per RPC call to mitigate OOM issues
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// on the ApplicationMaster when a thundering herd of reducers fetch events
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@ -171,6 +161,10 @@ public class Shuffle<K, V> implements ExceptionReporter {
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return kvIter;
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}
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@Override
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public void close(){
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}
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public synchronized void reportException(Throwable t) {
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if (throwable == null) {
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throwable = t;
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@ -748,6 +748,16 @@
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</description>
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</property>
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<property>
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<name>mapreduce.job.reduce.shuffle.consumer.plugin.class</name>
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<value>org.apache.hadoop.mapreduce.task.reduce.Shuffle</value>
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<description>
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Name of the class whose instance will be used
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to send shuffle requests by reducetasks of this job.
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The class must be an instance of org.apache.hadoop.mapred.ShuffleConsumerPlugin.
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</description>
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</property>
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<!-- MR YARN Application properties -->
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<property>
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|
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@ -0,0 +1,197 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
|
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* or more contributor license agreements. See the NOTICE file
|
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* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
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* 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
|
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
|
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* Unless required by applicable law or agreed to in writing, software
|
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* 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.
|
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*/
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package org.apache.hadoop.mapreduce;
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import org.junit.Test;
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import static org.junit.Assert.*;
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import static org.mockito.Mockito.*;
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import org.apache.hadoop.yarn.api.records.ApplicationId;
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import org.apache.hadoop.fs.LocalDirAllocator;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.mapred.Task.CombineOutputCollector;
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import org.apache.hadoop.io.compress.CompressionCodec;
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import org.apache.hadoop.util.Progress;
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import org.apache.hadoop.mapred.Reporter;
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import org.apache.hadoop.util.ReflectionUtils;
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import org.apache.hadoop.mapreduce.task.reduce.Shuffle;
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import org.apache.hadoop.mapred.Counters;
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import org.apache.hadoop.mapred.Counters.Counter;
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import org.apache.hadoop.mapred.MapOutputFile;
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import org.apache.hadoop.mapred.JobConf;
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import org.apache.hadoop.mapred.Task;
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import org.apache.hadoop.mapred.ReduceTask;
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import org.apache.hadoop.mapred.TaskStatus;
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import org.apache.hadoop.mapred.TaskUmbilicalProtocol;
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import org.apache.hadoop.mapred.ShuffleConsumerPlugin;
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import org.apache.hadoop.mapred.RawKeyValueIterator;
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import org.apache.hadoop.mapred.Reducer;
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/**
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* A JUnit for testing availability and accessibility of shuffle related API.
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* It is needed for maintaining comptability with external sub-classes of
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* ShuffleConsumerPlugin and AuxiliaryService(s) like ShuffleHandler.
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*
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* The importance of this test is for preserving API with 3rd party plugins.
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*/
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public class TestShufflePlugin<K, V> {
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static class TestShuffleConsumerPlugin<K, V> implements ShuffleConsumerPlugin<K, V> {
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@Override
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public void init(ShuffleConsumerPlugin.Context<K, V> context) {
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// just verify that Context has kept its public interface
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context.getReduceId();
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context.getJobConf();
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context.getLocalFS();
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context.getUmbilical();
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context.getLocalDirAllocator();
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context.getReporter();
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context.getCodec();
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context.getCombinerClass();
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context.getCombineCollector();
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context.getSpilledRecordsCounter();
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context.getReduceCombineInputCounter();
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context.getShuffledMapsCounter();
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context.getReduceShuffleBytes();
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context.getFailedShuffleCounter();
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context.getMergedMapOutputsCounter();
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context.getStatus();
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context.getCopyPhase();
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context.getMergePhase();
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context.getReduceTask();
|
||||
context.getMapOutputFile();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void close(){
|
||||
}
|
||||
|
||||
@Override
|
||||
public RawKeyValueIterator run() throws java.io.IOException, java.lang.InterruptedException{
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
@Test
|
||||
/**
|
||||
* A testing method instructing core hadoop to load an external ShuffleConsumerPlugin
|
||||
* as if it came from a 3rd party.
|
||||
*/
|
||||
public void testPluginAbility() {
|
||||
|
||||
try{
|
||||
// create JobConf with mapreduce.job.shuffle.consumer.plugin=TestShuffleConsumerPlugin
|
||||
JobConf jobConf = new JobConf();
|
||||
jobConf.setClass(MRConfig.SHUFFLE_CONSUMER_PLUGIN,
|
||||
TestShufflePlugin.TestShuffleConsumerPlugin.class,
|
||||
ShuffleConsumerPlugin.class);
|
||||
|
||||
ShuffleConsumerPlugin shuffleConsumerPlugin = null;
|
||||
Class<? extends ShuffleConsumerPlugin> clazz =
|
||||
jobConf.getClass(MRConfig.SHUFFLE_CONSUMER_PLUGIN, Shuffle.class, ShuffleConsumerPlugin.class);
|
||||
assertNotNull("Unable to get " + MRConfig.SHUFFLE_CONSUMER_PLUGIN, clazz);
|
||||
|
||||
// load 3rd party plugin through core's factory method
|
||||
shuffleConsumerPlugin = ReflectionUtils.newInstance(clazz, jobConf);
|
||||
assertNotNull("Unable to load " + MRConfig.SHUFFLE_CONSUMER_PLUGIN, shuffleConsumerPlugin);
|
||||
}
|
||||
catch (Exception e) {
|
||||
assertTrue("Threw exception:" + e, false);
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
/**
|
||||
* A testing method verifying availability and accessibility of API that is needed
|
||||
* for sub-classes of ShuffleConsumerPlugin
|
||||
*/
|
||||
public void testConsumerApi() {
|
||||
|
||||
JobConf jobConf = new JobConf();
|
||||
ShuffleConsumerPlugin<K, V> shuffleConsumerPlugin = new TestShuffleConsumerPlugin<K, V>();
|
||||
|
||||
//mock creation
|
||||
ReduceTask mockReduceTask = mock(ReduceTask.class);
|
||||
TaskUmbilicalProtocol mockUmbilical = mock(TaskUmbilicalProtocol.class);
|
||||
Reporter mockReporter = mock(Reporter.class);
|
||||
FileSystem mockFileSystem = mock(FileSystem.class);
|
||||
Class<? extends org.apache.hadoop.mapred.Reducer> combinerClass = jobConf.getCombinerClass();
|
||||
@SuppressWarnings("unchecked") // needed for mock with generic
|
||||
CombineOutputCollector<K, V> mockCombineOutputCollector =
|
||||
(CombineOutputCollector<K, V>) mock(CombineOutputCollector.class);
|
||||
org.apache.hadoop.mapreduce.TaskAttemptID mockTaskAttemptID =
|
||||
mock(org.apache.hadoop.mapreduce.TaskAttemptID.class);
|
||||
LocalDirAllocator mockLocalDirAllocator = mock(LocalDirAllocator.class);
|
||||
CompressionCodec mockCompressionCodec = mock(CompressionCodec.class);
|
||||
Counter mockCounter = mock(Counter.class);
|
||||
TaskStatus mockTaskStatus = mock(TaskStatus.class);
|
||||
Progress mockProgress = mock(Progress.class);
|
||||
MapOutputFile mockMapOutputFile = mock(MapOutputFile.class);
|
||||
Task mockTask = mock(Task.class);
|
||||
|
||||
try {
|
||||
String [] dirs = jobConf.getLocalDirs();
|
||||
// verify that these APIs are available through super class handler
|
||||
ShuffleConsumerPlugin.Context<K, V> context =
|
||||
new ShuffleConsumerPlugin.Context<K, V>(mockTaskAttemptID, jobConf, mockFileSystem,
|
||||
mockUmbilical, mockLocalDirAllocator,
|
||||
mockReporter, mockCompressionCodec,
|
||||
combinerClass, mockCombineOutputCollector,
|
||||
mockCounter, mockCounter, mockCounter,
|
||||
mockCounter, mockCounter, mockCounter,
|
||||
mockTaskStatus, mockProgress, mockProgress,
|
||||
mockTask, mockMapOutputFile);
|
||||
shuffleConsumerPlugin.init(context);
|
||||
shuffleConsumerPlugin.run();
|
||||
shuffleConsumerPlugin.close();
|
||||
}
|
||||
catch (Exception e) {
|
||||
assertTrue("Threw exception:" + e, false);
|
||||
}
|
||||
|
||||
// verify that these APIs are available for 3rd party plugins
|
||||
mockReduceTask.getTaskID();
|
||||
mockReduceTask.getJobID();
|
||||
mockReduceTask.getNumMaps();
|
||||
mockReduceTask.getPartition();
|
||||
mockReporter.progress();
|
||||
}
|
||||
|
||||
@Test
|
||||
/**
|
||||
* A testing method verifying availability and accessibility of API needed for
|
||||
* AuxiliaryService(s) which are "Shuffle-Providers" (ShuffleHandler and 3rd party plugins)
|
||||
*/
|
||||
public void testProviderApi() {
|
||||
|
||||
ApplicationId mockApplicationId = mock(ApplicationId.class);
|
||||
mockApplicationId.setClusterTimestamp(new Long(10));
|
||||
mockApplicationId.setId(mock(JobID.class).getId());
|
||||
LocalDirAllocator mockLocalDirAllocator = mock(LocalDirAllocator.class);
|
||||
JobConf mockJobConf = mock(JobConf.class);
|
||||
try {
|
||||
mockLocalDirAllocator.getLocalPathToRead("", mockJobConf);
|
||||
}
|
||||
catch (Exception e) {
|
||||
assertTrue("Threw exception:" + e, false);
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue