Examples of OutputCommitter

org.apache.hadoop.mapred.OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.
The Map-Reduce framework relies on the OutputCommitter of the job to:
1. Setup the job during initialization. For example, create the temporary output directory for the job during the initialization of the job.
2. Cleanup the job after the job completion. For example, remove the temporary output directory after the job completion.
3. Setup the task temporary output.
4. Check whether a task needs a commit. This is to avoid the commit procedure if a task does not need commit.
5. Commit of the task output.
6. Discard the task commit.
@see FileOutputCommitter @see JobContext @see TaskAttemptContext @deprecated Use {@link org.apache.hadoop.mapreduce.OutputCommitter} instead.
org.apache.hadoop.mapreduce.OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.
The Map-Reduce framework relies on the OutputCommitter of the job to:
1. Setup the job during initialization. For example, create the temporary output directory for the job during the initialization of the job.
2. Cleanup the job after the job completion. For example, remove the temporary output directory after the job completion.
3. Setup the task temporary output.
4. Check whether a task needs a commit. This is to avoid the commit procedure if a task does not need commit.
5. Commit of the task output.
6. Discard the task commit.
The methods in this class can be called from several different processes and from several different contexts. It is important to know which process and which context each is called from. Each method should be marked accordingly in its documentation. It is also important to note that not all methods are guaranteed to be called once and only once. If a method is not guaranteed to have this property the output committer needs to handle this appropriately. Also note it will only be in rare situations where they may be called multiple times for the same task. @see org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter @see JobContext @see TaskAttemptContext
org.apache.tez.runtime.api.OutputCommitter
OutputCommitter to "finalize" the output and make it user-visible if needed. The OutputCommitter is allowed only on a terminal Output.

Examples of org.apache.hadoop.mapreduce.OutputCommitter

    Configuration conf = new Configuration();
    AsyncDispatcher dispatcher = new AsyncDispatcher();
    dispatcher.init(conf);
    dispatcher.start();


    OutputCommitter committer = mock(OutputCommitter.class);
    doThrow(new IOException("forcefail"))
      .when(committer).setupJob(any(JobContext.class));
    CommitterEventHandler commitHandler =
        createCommitterEventHandler(dispatcher, committer);
    commitHandler.init(conf);

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Examples of org.apache.hadoop.mapreduce.OutputCommitter


  @Override
  protected EventHandler<CommitterEvent> createCommitterEventHandler(
      AppContext context, final OutputCommitter committer) {
    // create an output committer with the task methods stubbed out
    OutputCommitter stubbedCommitter = new OutputCommitter() {
      @Override
      public void setupJob(JobContext jobContext) throws IOException {
        committer.setupJob(jobContext);
      }
      @SuppressWarnings("deprecation")

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Examples of org.apache.hadoop.mapreduce.OutputCommitter

    }


    @Override
    public OutputCommitter getOutputCommitter(TaskAttemptContext context)
        throws IOException, InterruptedException {
      return new OutputCommitter() {


        @Override
        public void abortTask(TaskAttemptContext context) throws IOException {
          try {
            if (ps != null) {

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Examples of org.apache.hadoop.mapreduce.OutputCommitter

        OutputFormat<?,?> of = sfunc.getOutputFormat();
        
        POStore store = new POStore(new OperatorKey());
        store.setSFile(new FileSpec(file, storeFuncSpec));
        PigOutputFormat.setLocation(jc, store);
        OutputCommitter oc;
        // create a simulated TaskAttemptContext
        TaskAttemptContext tac = new TaskAttemptContext(conf, new TaskAttemptID());
        PigOutputFormat.setLocation(tac, store);
        RecordWriter<?,?> rw ;
        try {
            of.checkOutputSpecs(jc);
            oc = of.getOutputCommitter(tac);
            oc.setupJob(jc);
            oc.setupTask(tac);
            rw = of.getRecordWriter(tac);
            sfunc.prepareToWrite(rw);
        
            for (Iterator<Tuple> it = data.iterator(); it.hasNext();) {
                Tuple row = it.next();
                sfunc.putNext(row);
            }
            rw.close(tac);
        } catch (InterruptedException e) {
            throw new IOException(e);
        }
        if(oc.needsTaskCommit(tac)) {
            oc.commitTask(tac);
        }
        oc.cleanupJob(jc);
    }

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Examples of org.apache.hadoop.mapreduce.OutputCommitter

  protected Dispatcher createDispatcher() {
    return new AsyncDispatcher();
  }


  private OutputCommitter createOutputCommitter(Configuration conf) {
    OutputCommitter committer = null;


    LOG.info("OutputCommitter set in config "
        + conf.get("mapred.output.committer.class"));


    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);
      }
    } else {
      committer = ReflectionUtils.newInstance(conf.getClass(
          "mapred.output.committer.class", FileOutputCommitter.class,
          org.apache.hadoop.mapred.OutputCommitter.class), conf);
    }
    LOG.info("OutputCommitter is " + committer.getClass().getName());
    return committer;
  }

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Examples of org.apache.hadoop.mapreduce.OutputCommitter


  @Override
  protected EventHandler<CommitterEvent> createCommitterEventHandler(
      AppContext context, final OutputCommitter committer) {
    // create an output committer with the task methods stubbed out
    OutputCommitter stubbedCommitter = new OutputCommitter() {
      @Override
      public void setupJob(JobContext jobContext) throws IOException {
        committer.setupJob(jobContext);
      }
      @SuppressWarnings("deprecation")

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Examples of org.apache.hadoop.mapreduce.OutputCommitter

    
 
    AsyncDispatcher dispatcher = new AsyncDispatcher();
    dispatcher.init(conf);
    dispatcher.start();
    OutputCommitter committer = mock(OutputCommitter.class);
    CommitterEventHandler commitHandler =
        createCommitterEventHandler(dispatcher, committer);
    commitHandler.init(conf);
    commitHandler.start();

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Examples of org.apache.hadoop.mapreduce.OutputCommitter

    conf.set(MRJobConfig.MR_AM_STAGING_DIR, stagingDir);
    AsyncDispatcher dispatcher = new AsyncDispatcher();
    dispatcher.init(conf);
    dispatcher.start();
    CyclicBarrier syncBarrier = new CyclicBarrier(2);
    OutputCommitter committer = new TestingOutputCommitter(syncBarrier, false);
    CommitterEventHandler commitHandler =
        createCommitterEventHandler(dispatcher, committer);
    commitHandler.init(conf);
    commitHandler.start();

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Examples of org.apache.hadoop.mapreduce.OutputCommitter

    conf.set(MRJobConfig.MR_AM_STAGING_DIR, stagingDir);
    AsyncDispatcher dispatcher = new AsyncDispatcher();
    dispatcher.init(conf);
    dispatcher.start();
    CyclicBarrier syncBarrier = new CyclicBarrier(2);
    OutputCommitter committer = new TestingOutputCommitter(syncBarrier, true);
    CommitterEventHandler commitHandler =
        createCommitterEventHandler(dispatcher, committer);
    commitHandler.init(conf);
    commitHandler.start();

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Examples of org.apache.hadoop.mapreduce.OutputCommitter

    Configuration conf = new Configuration();
    conf.set(MRJobConfig.MR_AM_STAGING_DIR, stagingDir);
    AsyncDispatcher dispatcher = new AsyncDispatcher();
    dispatcher.init(conf);
    dispatcher.start();
    OutputCommitter committer = new StubbedOutputCommitter() {
      @Override
      public synchronized void setupJob(JobContext jobContext)
          throws IOException {
        while(!Thread.interrupted()){
          try{

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