org.apache.hadoop.mapreduce.task.reduce
Class Shuffle<K,V>

java.lang.Object
  org.apache.hadoop.mapreduce.task.reduce.Shuffle<K,V>

@InterfaceAudience.Private
@InterfaceStability.Unstable
public class Shuffle<K,V>
extends Object

Nested Class Summary

static class

Shuffle.ShuffleError

Constructor Summary

Shuffle(TaskAttemptID reduceId, JobConf jobConf, org.apache.hadoop.fs.FileSystem localFS, TaskUmbilicalProtocol umbilical, org.apache.hadoop.fs.LocalDirAllocator localDirAllocator, Reporter reporter, org.apache.hadoop.io.compress.CompressionCodec codec, Class<? extends Reducer> combinerClass, Task.CombineOutputCollector<K,V> combineCollector, Counters.Counter spilledRecordsCounter, Counters.Counter reduceCombineInputCounter, Counters.Counter shuffledMapsCounter, Counters.Counter reduceShuffleBytes, Counters.Counter failedShuffleCounter, Counters.Counter mergedMapOutputsCounter, TaskStatus status, org.apache.hadoop.util.Progress copyPhase, org.apache.hadoop.util.Progress mergePhase, Task reduceTask, MapOutputFile mapOutputFile)

Method Summary

void	reportException(Throwable t)
RawKeyValueIterator	run()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Shuffle

public Shuffle(TaskAttemptID reduceId,
               JobConf jobConf,
               org.apache.hadoop.fs.FileSystem localFS,
               TaskUmbilicalProtocol umbilical,
               org.apache.hadoop.fs.LocalDirAllocator localDirAllocator,
               Reporter reporter,
               org.apache.hadoop.io.compress.CompressionCodec codec,
               Class<? extends Reducer> combinerClass,
               Task.CombineOutputCollector<K,V> combineCollector,
               Counters.Counter spilledRecordsCounter,
               Counters.Counter reduceCombineInputCounter,
               Counters.Counter shuffledMapsCounter,
               Counters.Counter reduceShuffleBytes,
               Counters.Counter failedShuffleCounter,
               Counters.Counter mergedMapOutputsCounter,
               TaskStatus status,
               org.apache.hadoop.util.Progress copyPhase,
               org.apache.hadoop.util.Progress mergePhase,
               Task reduceTask,
               MapOutputFile mapOutputFile)

Method Detail

run

public RawKeyValueIterator run()
                        throws IOException,
                               InterruptedException

Throws:

IOException

InterruptedException

reportException

public void reportException(Throwable t)