How to use

getTaskAttemptID

method

in

org.apache.hadoop.mapreduce.Mapper$Context

testing.injectedFailureCount = context.getTaskAttemptID().getId();

Exception ex = null;
try {
 zkw = new ZKWatcher(conf, context.getTaskAttemptID().toString(), null);
 clusterIds = Collections.singletonList(ZKClusterId.getUUIDForCluster(zkw));
} catch (ZooKeeperConnectionException e) {

  private void futureGet(Context context) throws IOException {
    try {
      future.get();
    } catch (Exception e) {
      throw new IOException("Failed to build cube in mapper " + context.getTaskAttemptID().getTaskID().getId(), e);
    }
  }
}

 public void map(LongWritable key, Text value, Context context
 ) throws IOException, InterruptedException {
  String id = context.getTaskAttemptID().toString();
  // Mapper 0 does not output anything
  if (!id.endsWith("0_0")) {
   context.write(key, value);
  }
 }
}

@Override
protected void setup(Context context)
  throws IOException, InterruptedException {
 Path attemptDir = FileOutputFormat.getWorkOutputPath(context);
 String filename = context.getTaskAttemptID()
   .getTaskID().toString();
 Path sideEffectFile = new Path(attemptDir, filename);
 sideEffectStream = FileSystem.get(context.getConfiguration())
   .create(sideEffectFile);
 log.info("Opened file = {}", sideEffectFile);
}

 @Override
 protected void cleanup(Context context) throws IOException,
  InterruptedException {
  context.write(new IntWritable(context.getTaskAttemptID().getTaskID()
                  .getId()),
         new VectorWritable(new DenseVector(mYtY.getData())));
 }
}

@SuppressWarnings("unchecked")
private Context createSubContextForHadoop1(Context context) throws NoSuchMethodException,
    InstantiationException, IllegalAccessException, InvocationTargetException {
  Constructor<?> constructor = Context.class.getDeclaredConstructor(Mapper.class, Configuration.class,
      TaskAttemptID.class, RecordReader.class, RecordWriter.class, OutputCommitter.class,
      StatusReporter.class, InputSplit.class);
  constructor.setAccessible(true);
  return (Context) constructor.newInstance(mapper, outer.getConfiguration(), outer.getTaskAttemptID(),
      reader, new SubMapRecordWriter(), context.getOutputCommitter(), new SubMapStatusReporter(),
      outer.getInputSplit());
}

  private void futureGet(Context context) throws IOException {
    try {
      future.get();
    } catch (Exception e) {
      throw new IOException("Failed to build cube in mapper " + context.getTaskAttemptID().getTaskID().getId(), e);
    }
  }
}

private Random createRandom(Context context) {
 long taskId = 0;
 if (context.getTaskAttemptID() != null) { // MRUnit returns null
  LOGGER.debug("context.getTaskAttemptID().getId(): {}", context.getTaskAttemptID().getId());
  LOGGER.debug("context.getTaskAttemptID().getTaskID().getId(): {}", context.getTaskAttemptID().getTaskID().getId());
  taskId = context.getTaskAttemptID().getTaskID().getId(); // taskId = 0, 1, ..., N
 }
 // create a good random seed, yet ensure deterministic PRNG sequence for easy reproducability
 return new Random(421439783L * (taskId + 1));
}

private Path getTmpFile(Path target, Mapper.Context context) {
 Path targetWorkPath = new Path(context.getConfiguration().
   get(DistCpConstants.CONF_LABEL_TARGET_WORK_PATH));
 Path root = target.equals(targetWorkPath)? targetWorkPath.getParent() : targetWorkPath;
 LOG.info("Creating temp file: " +
   new Path(root, ".distcp.tmp." + context.getTaskAttemptID().toString()));
 return new Path(root, ".distcp.tmp." + context.getTaskAttemptID().toString());
}

 @Override
 protected void cleanup(Context context) throws IOException,
  InterruptedException {
  context.write(new IntWritable(context.getTaskAttemptID().getTaskID()
                  .getId()),
         new VectorWritable(new DenseVector(mYtY.getData())));
 }
}

 public void map(LongWritable key, Text value, Context context
 ) throws IOException, InterruptedException {
  String id = context.getTaskAttemptID().toString();
  // Mapper 0 does not output anything
  if (!id.endsWith("0_0")) {
   context.write(key, value);
  }
 }
}

 GobblinMultiTaskAttempt.runWorkUnits(this.jobState.getJobId(), context.getTaskAttemptID().toString(),
   this.jobState, this.workUnits, this.taskStateTracker, this.taskExecutor, this.taskStateStore,
   multiTaskAttemptCommitPolicy, jobBroker);
GobblinOutputCommitter gobblinOutputCommitter = (GobblinOutputCommitter) context.getOutputCommitter();
gobblinOutputCommitter.getAttemptIdToMultiTaskAttempt()
  .put(context.getTaskAttemptID().toString(), gobblinMultiTaskAttempt);

this.jobMetrics.get()
  .startMetricReportingWithFileSuffix(HadoopUtils.getStateFromConf(configuration),
    context.getTaskAttemptID().toString());

@Override
protected void setup(Context context) throws IOException, InterruptedException {
 id = Bytes.toBytes("Job: "+context.getJobID() + " Task: " + context.getTaskAttemptID());
 this.connection = ConnectionFactory.createConnection(context.getConfiguration());
 instantiateHTable();

  outputFS,
  finalSegmentTemplate,
  context.getTaskAttemptID(),
  config.DATA_SEGMENT_PUSHER
),

byte valBytes[] = new byte[valLength];
int taskId = context.getTaskAttemptID().getTaskID().getId();
assert taskId < Byte.MAX_VALUE : "Unit tests dont support > 127 tasks!";

byte valBytes[] = new byte[valLength];
int taskId = context.getTaskAttemptID().getTaskID().getId();
assert taskId < Byte.MAX_VALUE : "Unit tests dont support > 127 tasks!";
Random random = new Random();

  @Override public void run(Context ctx) throws IOException, InterruptedException {
    System.out.println("Running task: " + ctx.getTaskAttemptID().getTaskID().getId());
    latch.get("mapAwaitLatch").await();
    mapExecCnt.incrementAndGet();
    System.out.println("Completed task: " + ctx.getTaskAttemptID().getTaskID().getId());
  }
}

/** {@inheritDoc} */
@Override protected void setup(Context ctx) throws IOException, InterruptedException {
  X.println("___ Mapper: " + ctx.getTaskAttemptID());
  String taskId = ctx.getTaskAttemptID().toString();
  LocalFileSystem locFs = FileSystem.getLocal(ctx.getConfiguration());
  String workDir = locFs.getWorkingDirectory().toString();
  assertNull(taskWorkDirs.put(workDir, taskId));
}