Package org.apache.hadoop.mapreduce.task

Examples of org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl


}
 
 
  private void writeOutput(TaskAttempt attempt, Configuration conf)
    throws Exception {
    TaskAttemptContext tContext = new TaskAttemptContextImpl(conf,
        TypeConverter.fromYarn(attempt.getID()));
   
    TextOutputFormat<?, ?> theOutputFormat = new TextOutputFormat();
    RecordWriter theRecordWriter = theOutputFormat
        .getRecordWriter(tContext);
   
    NullWritable nullWritable = NullWritable.get();
    try {
      theRecordWriter.write(key1, val1);
      theRecordWriter.write(null, nullWritable);
      theRecordWriter.write(null, val1);
      theRecordWriter.write(nullWritable, val2);
      theRecordWriter.write(key2, nullWritable);
      theRecordWriter.write(key1, null);
      theRecordWriter.write(null, null);
      theRecordWriter.write(key2, val2);
    } finally {
      theRecordWriter.close(tContext);
    }
   
    OutputFormat outputFormat = ReflectionUtils.newInstance(
        tContext.getOutputFormatClass(), conf);
    OutputCommitter committer = outputFormat.getOutputCommitter(tContext);
    committer.commitTask(tContext);
  }
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      }

      CombineFileSplit combineFileSplit = new CombineFileSplit(paths, fileLength);
      TaskAttemptID taskAttemptID = Mockito.mock(TaskAttemptID.class);
      TaskReporter reporter = Mockito.mock(TaskReporter.class);
      TaskAttemptContextImpl taskAttemptContext =
        new TaskAttemptContextImpl(conf, taskAttemptID,reporter);

      CombineFileRecordReader cfrr = new CombineFileRecordReader(combineFileSplit,
        taskAttemptContext, TextRecordReaderWrapper.class);

      cfrr.initialize(combineFileSplit,taskAttemptContext);
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    if (newApiCommitter) {
      org.apache.hadoop.mapreduce.v2.api.records.TaskId taskID = MRBuilderUtils
          .newTaskId(jobId, 0, TaskType.MAP);
      org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID = MRBuilderUtils
          .newTaskAttemptId(taskID, 0);
      TaskAttemptContext taskContext = new TaskAttemptContextImpl(conf,
          TypeConverter.fromYarn(attemptID));
      OutputFormat outputFormat;
      try {
        outputFormat = ReflectionUtils.newInstance(taskContext
            .getOutputFormatClass(), conf);
        committer = outputFormat.getOutputCommitter(taskContext);
      } catch (Exception e) {
        throw new YarnRuntimeException(e);
      }
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    // CombineFileInputFormat and CombineFileRecordReader are used.

    TaskAttemptID taskId = new TaskAttemptID("jt", 0, TaskType.MAP, 0, 0);
    Configuration conf1 = new Configuration();
    conf1.set(DUMMY_KEY, "STATE1");
    TaskAttemptContext context1 = new TaskAttemptContextImpl(conf1, taskId);

    // This will create a CombineFileRecordReader that itself contains a
    // DummyRecordReader.
    InputFormat inputFormat = new ChildRRInputFormat();

    Path [] files = { new Path("file1") };
    long [] lengths = { 1 };

    CombineFileSplit split = new CombineFileSplit(files, lengths);

    RecordReader rr = inputFormat.createRecordReader(split, context1);
    assertTrue("Unexpected RR type!", rr instanceof CombineFileRecordReader);

    // Verify that the initial configuration is the one being used.
    // Right after construction the dummy key should have value "STATE1"
    assertEquals("Invalid initial dummy key value", "STATE1",
      rr.getCurrentKey().toString());

    // Switch the active context for the RecordReader...
    Configuration conf2 = new Configuration();
    conf2.set(DUMMY_KEY, "STATE2");
    TaskAttemptContext context2 = new TaskAttemptContextImpl(conf2, taskId);
    rr.initialize(split, context2);

    // And verify that the new context is updated into the child record reader.
    assertEquals("Invalid secondary dummy key value", "STATE2",
      rr.getCurrentKey().toString());
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    // Test that a split containing multiple files works correctly,
    // with the child RecordReader getting its initialize() method
    // called a second time.
    TaskAttemptID taskId = new TaskAttemptID("jt", 0, TaskType.MAP, 0, 0);
    Configuration conf = new Configuration();
    TaskAttemptContext context = new TaskAttemptContextImpl(conf, taskId);

    // This will create a CombineFileRecordReader that itself contains a
    // DummyRecordReader.
    InputFormat inputFormat = new ChildRRInputFormat();
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        TaskAttemptState state = TaskAttemptState.valueOf(attInfo.getTaskStatus());
        switch (state) {
        case SUCCEEDED:
          //recover the task output
          TaskAttemptContext taskContext = new TaskAttemptContextImpl(getConfig(),
              attInfo.getAttemptId());
          try {
            TaskType type = taskContext.getTaskAttemptID().getTaskID().getTaskType();
            int numReducers = taskContext.getConfiguration().getInt(MRJobConfig.NUM_REDUCES, 1);
            if(type == TaskType.REDUCE || (type == TaskType.MAP && numReducers <= 0)) {
              committer.recoverTask(taskContext);
              LOG.info("Recovered output from task attempt " + attInfo.getAttemptId());
            } else {
              LOG.info("Will not try to recover output for "
                  + taskContext.getTaskAttemptID());
            }
          } catch (IOException e) {
            LOG.error("Caught an exception while trying to recover task "+aId, e);
            actualHandler.handle(new JobDiagnosticsUpdateEvent(
                aId.getTaskId().getJobId(), "Error in recovering task output " +
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    if (newApiCommitter) {
      org.apache.hadoop.mapreduce.v2.api.records.TaskId taskID = MRBuilderUtils
          .newTaskId(jobId, 0, TaskType.MAP);
      org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID = MRBuilderUtils
          .newTaskAttemptId(taskID, 0);
      TaskAttemptContext taskContext = new TaskAttemptContextImpl(conf,
          TypeConverter.fromYarn(attemptID));
      OutputFormat outputFormat;
      try {
        outputFormat = ReflectionUtils.newInstance(taskContext
            .getOutputFormatClass(), conf);
        committer = outputFormat.getOutputCommitter(taskContext);
      } catch (Exception e) {
        throw new YarnException(e);
      }
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    validateOutput();
  }
 
  private void writeBadOutput(TaskAttempt attempt, Configuration conf)
  throws Exception {
  TaskAttemptContext tContext = new TaskAttemptContextImpl(conf,
      TypeConverter.fromYarn(attempt.getID()));
 
  TextOutputFormat<?, ?> theOutputFormat = new TextOutputFormat();
  RecordWriter theRecordWriter = theOutputFormat
      .getRecordWriter(tContext);
 
  NullWritable nullWritable = NullWritable.get();
  try {
    theRecordWriter.write(key2, val2);
    theRecordWriter.write(null, nullWritable);
    theRecordWriter.write(null, val2);
    theRecordWriter.write(nullWritable, val1);
    theRecordWriter.write(key1, nullWritable);
    theRecordWriter.write(key2, null);
    theRecordWriter.write(null, null);
    theRecordWriter.write(key1, val1);
  } finally {
    theRecordWriter.close(tContext);
  }
 
  OutputFormat outputFormat = ReflectionUtils.newInstance(
      tContext.getOutputFormatClass(), conf);
  OutputCommitter committer = outputFormat.getOutputCommitter(tContext);
  committer.commitTask(tContext);
}
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}
 
 
  private void writeOutput(TaskAttempt attempt, Configuration conf)
    throws Exception {
    TaskAttemptContext tContext = new TaskAttemptContextImpl(conf,
        TypeConverter.fromYarn(attempt.getID()));
   
    TextOutputFormat<?, ?> theOutputFormat = new TextOutputFormat();
    RecordWriter theRecordWriter = theOutputFormat
        .getRecordWriter(tContext);
   
    NullWritable nullWritable = NullWritable.get();
    try {
      theRecordWriter.write(key1, val1);
      theRecordWriter.write(null, nullWritable);
      theRecordWriter.write(null, val1);
      theRecordWriter.write(nullWritable, val2);
      theRecordWriter.write(key2, nullWritable);
      theRecordWriter.write(key1, null);
      theRecordWriter.write(null, null);
      theRecordWriter.write(key2, val2);
    } finally {
      theRecordWriter.close(tContext);
    }
   
    OutputFormat outputFormat = ReflectionUtils.newInstance(
        tContext.getOutputFormatClass(), conf);
    OutputCommitter committer = outputFormat.getOutputCommitter(tContext);
    committer.commitTask(tContext);
  }
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    if (taskAttemptId == null) {
      // If the caller is not within a mapper/reducer (if reading from the table via CliDriver),
      // then TaskAttemptID.forname() may return NULL. Fall back to using default constructor.
      taskAttemptId = new TaskAttemptID();
    }
    return new TaskAttemptContextImpl(conf, taskAttemptId) {
      @Override
      public void progress() {
        progressable.progress();
      }
    };
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