internal Fetcher(JobConf job, TaskAttemptID reduceId, ShuffleSchedulerImpl <K, V>
scheduler, MergeManager <K, V> merger, Reporter reporter, ShuffleClientMetrics metrics
, ExceptionReporter exceptionReporter, SecretKey shuffleKey, int id)
{
/* Default read timeout (in milliseconds) */
// Initiative value is 0, which means it hasn't retried yet.
this.jobConf = job;
this.reporter = reporter;
this.scheduler = scheduler;
this.merger = merger;
this.metrics = metrics;
this.exceptionReporter = exceptionReporter;
this.id = id;
this.reduce = reduceId.GetTaskID().GetId();
this.shuffleSecretKey = shuffleKey;
ioErrs = reporter.GetCounter(ShuffleErrGrpName, Fetcher.ShuffleErrors.IoError.ToString
());
wrongLengthErrs = reporter.GetCounter(ShuffleErrGrpName, Fetcher.ShuffleErrors.WrongLength
.ToString());
badIdErrs = reporter.GetCounter(ShuffleErrGrpName, Fetcher.ShuffleErrors.BadId.ToString
());
wrongMapErrs = reporter.GetCounter(ShuffleErrGrpName, Fetcher.ShuffleErrors.WrongMap
.ToString());
connectionErrs = reporter.GetCounter(ShuffleErrGrpName, Fetcher.ShuffleErrors.Connection
.ToString());
wrongReduceErrs = reporter.GetCounter(ShuffleErrGrpName, Fetcher.ShuffleErrors.WrongReduce
.ToString());
this.connectionTimeout = job.GetInt(MRJobConfig.ShuffleConnectTimeout, DefaultStalledCopyTimeout
);
this.readTimeout = job.GetInt(MRJobConfig.ShuffleReadTimeout, DefaultReadTimeout);
this.fetchRetryInterval = job.GetInt(MRJobConfig.ShuffleFetchRetryIntervalMs, MRJobConfig
.DefaultShuffleFetchRetryIntervalMs);
this.fetchRetryTimeout = job.GetInt(MRJobConfig.ShuffleFetchRetryTimeoutMs, DefaultStalledCopyTimeout
);
bool shuffleFetchEnabledDefault = job.GetBoolean(YarnConfiguration.NmRecoveryEnabled
, YarnConfiguration.DefaultNmRecoveryEnabled);
this.fetchRetryEnabled = job.GetBoolean(MRJobConfig.ShuffleFetchRetryEnabled, shuffleFetchEnabledDefault
);
SetName("fetcher#" + id);
SetDaemon(true);
lock (typeof(Org.Apache.Hadoop.Mapreduce.Task.Reduce.Fetcher))
{
sslShuffle = job.GetBoolean(MRConfig.ShuffleSslEnabledKey, MRConfig.ShuffleSslEnabledDefault
);
if (sslShuffle && sslFactory == null)
{
sslFactory = new SSLFactory(SSLFactory.Mode.Client, job);
try
{
sslFactory.Init();
}
catch (Exception ex)
{
sslFactory.Destroy();
throw new RuntimeException(ex);
}
}
}
}
public Fetcher(JobConf job, TaskAttemptID reduceId, ShuffleSchedulerImpl <K, V> scheduler
, MergeManager <K, V> merger, Reporter reporter, ShuffleClientMetrics metrics, ExceptionReporter
exceptionReporter, SecretKey shuffleKey)
: this(job, reduceId, scheduler, merger, reporter, metrics, exceptionReporter, shuffleKey
, ++nextId)
{
}
public virtual void Setup()
{
// mocked generics
Log.Info(">>>> " + name.GetMethodName());
job = new JobConf();
job.SetBoolean(MRJobConfig.ShuffleFetchRetryEnabled, false);
jobWithRetry = new JobConf();
jobWithRetry.SetBoolean(MRJobConfig.ShuffleFetchRetryEnabled, true);
id = TaskAttemptID.ForName("attempt_0_1_r_1_1");
ss = Org.Mockito.Mockito.Mock <ShuffleSchedulerImpl>();
mm = Org.Mockito.Mockito.Mock <MergeManagerImpl>();
r = Org.Mockito.Mockito.Mock <Reporter>();
metrics = Org.Mockito.Mockito.Mock <ShuffleClientMetrics>();
except = Org.Mockito.Mockito.Mock <ExceptionReporter>();
key = JobTokenSecretManager.CreateSecretKey(new byte[] { 0, 0, 0, 0 });
connection = Org.Mockito.Mockito.Mock <HttpURLConnection>();
allErrs = Org.Mockito.Mockito.Mock <Counters.Counter>();
Org.Mockito.Mockito.When(r.GetCounter(Matchers.AnyString(), Matchers.AnyString())
).ThenReturn(allErrs);
AList <TaskAttemptID> maps = new AList <TaskAttemptID>(1);
maps.AddItem(map1ID);
maps.AddItem(map2ID);
Org.Mockito.Mockito.When(ss.GetMapsForHost(host)).ThenReturn(maps);
}
//Used for status updates
public virtual void Init(ShuffleConsumerPlugin.Context context)
{
this.context = context;
this.reduceId = context.GetReduceId();
this.jobConf = context.GetJobConf();
this.umbilical = context.GetUmbilical();
this.reporter = context.GetReporter();
this.metrics = new ShuffleClientMetrics(reduceId, jobConf);
this.copyPhase = context.GetCopyPhase();
this.taskStatus = context.GetStatus();
this.reduceTask = context.GetReduceTask();
this.localMapFiles = context.GetLocalMapFiles();
scheduler = new ShuffleSchedulerImpl <K, V>(jobConf, taskStatus, reduceId, this, copyPhase
, context.GetShuffledMapsCounter(), context.GetReduceShuffleBytes(), context.GetFailedShuffleCounter
());
merger = CreateMergeManager(context);
}
/// <exception cref="System.IO.IOException"/>
public override void Shuffle(MapHost host, InputStream input, long compressedLength
, long decompressedLength, ShuffleClientMetrics metrics, Reporter reporter)
{
input = new IFileInputStream(input, compressedLength, conf);
// Copy data to local-disk
long bytesLeft = compressedLength;
try
{
int BytesToRead = 64 * 1024;
byte[] buf = new byte[BytesToRead];
while (bytesLeft > 0)
{
int n = ((IFileInputStream)input).ReadWithChecksum(buf, 0, (int)Math.Min(bytesLeft
, BytesToRead));
if (n < 0)
{
throw new IOException("read past end of stream reading " + GetMapId());
}
disk.Write(buf, 0, n);
bytesLeft -= n;
metrics.InputBytes(n);
reporter.Progress();
}
Log.Info("Read " + (compressedLength - bytesLeft) + " bytes from map-output for "
+ GetMapId());
disk.Close();
}
catch (IOException ioe)
{
// Close the streams
IOUtils.Cleanup(Log, input, disk);
// Re-throw
throw;
}
// Sanity check
if (bytesLeft != 0)
{
throw new IOException("Incomplete map output received for " + GetMapId() + " from "
+ host.GetHostName() + " (" + bytesLeft + " bytes missing of " + compressedLength
+ ")");
}
this.compressedSize = compressedLength;
}
/// <exception cref="System.IO.IOException"/>
public override void Shuffle(MapHost host, InputStream input, long compressedLength
, long decompressedLength, ShuffleClientMetrics metrics, Reporter reporter)
{
IFileInputStream checksumIn = new IFileInputStream(input, compressedLength, conf);
input = checksumIn;
// Are map-outputs compressed?
if (codec != null)
{
decompressor.Reset();
input = codec.CreateInputStream(input, decompressor);
}
try
{
IOUtils.ReadFully(input, memory, 0, memory.Length);
metrics.InputBytes(memory.Length);
reporter.Progress();
Log.Info("Read " + memory.Length + " bytes from map-output for " + GetMapId());
if (input.Read() >= 0)
{
throw new IOException("Unexpected extra bytes from input stream for " + GetMapId(
));
}
}
catch (IOException ioe)
{
// Close the streams
IOUtils.Cleanup(Log, input);
// Re-throw
throw;
}
finally
{
CodecPool.ReturnDecompressor(decompressor);
}
}
/// <exception cref="System.IO.IOException"/>
public abstract void Shuffle(MapHost host, InputStream input, long compressedLength
, long decompressedLength, ShuffleClientMetrics metrics, Reporter reporter);
public FakeFetcher(JobConf job, TaskAttemptID reduceId, ShuffleSchedulerImpl <K, V
> scheduler, MergeManagerImpl <K, V> merger, Reporter reporter, ShuffleClientMetrics
metrics, ExceptionReporter exceptionReporter, SecretKey jobTokenSecret, HttpURLConnection
connection, int id)
: base(job, reduceId, scheduler, merger, reporter, metrics, exceptionReporter, jobTokenSecret
, id)
{
this.connection = connection;
}
public LocalFetcher(JobConf job, TaskAttemptID reduceId, ShuffleSchedulerImpl <K,
V> scheduler, MergeManager <K, V> merger, Reporter reporter, ShuffleClientMetrics
metrics, ExceptionReporter exceptionReporter, SecretKey shuffleKey, IDictionary
<TaskAttemptID, MapOutputFile> localMapFiles)
: base(job, reduceId, scheduler, merger, reporter, metrics, exceptionReporter, shuffleKey
)
{
this.job = job;
this.localMapFiles = localMapFiles;
SetName("localfetcher#" + id);
SetDaemon(true);
}