Package org.apache.hadoop.mapreduce.task

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

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  }

  @Test
  public void testAtomicCommitExistingFinal() {
    TaskAttemptContext taskAttemptContext = getTaskAttemptContext(config);
    JobContext jobContext = new JobContextImpl(taskAttemptContext.getConfiguration(),
        taskAttemptContext.getTaskAttemptID().getJobID());
    Configuration conf = jobContext.getConfiguration();


    String workPath = "/tmp1/" + String.valueOf(rand.nextLong());
    String finalPath = "/tmp1/" + String.valueOf(rand.nextLong());
    FileSystem fs = null;
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      OutputFormat outputFormat = new CopyOutputFormat();
      Job job = Job.getInstance(new Configuration());
      JobID jobID = new JobID("200707121733", 1);

      try {
        JobContext context = new JobContextImpl(job.getConfiguration(), jobID);
        outputFormat.checkOutputSpecs(context);
        Assert.fail("No checking for invalid work/commit path");
      } catch (IllegalStateException ignore) { }

      CopyOutputFormat.setWorkingDirectory(job, new Path("/tmp/work"));
      try {
        JobContext context = new JobContextImpl(job.getConfiguration(), jobID);
        outputFormat.checkOutputSpecs(context);
        Assert.fail("No checking for invalid commit path");
      } catch (IllegalStateException ignore) { }

      job.getConfiguration().set(DistCpConstants.CONF_LABEL_TARGET_WORK_PATH, "");
      CopyOutputFormat.setCommitDirectory(job, new Path("/tmp/commit"));
      try {
        JobContext context = new JobContextImpl(job.getConfiguration(), jobID);
        outputFormat.checkOutputSpecs(context);
        Assert.fail("No checking for invalid work path");
      } catch (IllegalStateException ignore) { }

      CopyOutputFormat.setWorkingDirectory(job, new Path("/tmp/work"));
      CopyOutputFormat.setCommitDirectory(job, new Path("/tmp/commit"));
      try {
        JobContext context = new JobContextImpl(job.getConfiguration(), jobID);
        outputFormat.checkOutputSpecs(context);
      } catch (IllegalStateException ignore) {
        Assert.fail("Output spec check failed.");
      }
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    Path listFile = new Path(cluster.getFileSystem().getUri().toString()
        + "/tmp/testGetSplits_1/fileList.seq");
    CopyListing.getCopyListing(configuration, CREDENTIALS, options).
        buildListing(listFile, options);

    JobContext jobContext = new JobContextImpl(configuration, new JobID());
    UniformSizeInputFormat uniformSizeInputFormat = new UniformSizeInputFormat();
    List<InputSplit> splits
            = uniformSizeInputFormat.getSplits(jobContext);

    int sizePerMap = totalFileSize/nMaps;

    checkSplits(listFile, splits);

    int doubleCheckedTotalSize = 0;
    int previousSplitSize = -1;
    for (int i=0; i<splits.size(); ++i) {
      InputSplit split = splits.get(i);
      int currentSplitSize = 0;
      RecordReader<Text, FileStatus> recordReader = uniformSizeInputFormat.createRecordReader(
              split, null);
      StubContext stubContext = new StubContext(jobContext.getConfiguration(),
                                                recordReader, 0);
      final TaskAttemptContext taskAttemptContext
         = stubContext.getContext();
      recordReader.initialize(split, taskAttemptContext);
      while (recordReader.nextKeyValue()) {
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    Job job = Job.getInstance();
    FileOutputFormat.setOutputPath(job, outDir);
    Configuration conf = job.getConfiguration();
    conf.set(MRJobConfig.TASK_ATTEMPT_ID, attempt);
    conf.setInt(MRJobConfig.APPLICATION_ATTEMPT_ID, 1);
    JobContext jContext = new JobContextImpl(conf, taskID.getJobID());
    TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID);
    FileOutputCommitter committer = new FileOutputCommitter(outDir, tContext);

    // setup
    committer.setupJob(jContext);
    committer.setupTask(tContext);

    // write output
    TextOutputFormat theOutputFormat = new TextOutputFormat();
    RecordWriter theRecordWriter = theOutputFormat.getRecordWriter(tContext);
    writeOutput(theRecordWriter, tContext);

    // do commit
    committer.commitTask(tContext);
    Path jobTempDir1 = committer.getCommittedTaskPath(tContext);
    File jtd = new File(jobTempDir1.toUri().getPath());
    assertTrue(jtd.exists());
    validateContent(jtd);   
   
    //now while running the second app attempt,
    //recover the task output from first attempt
    Configuration conf2 = job.getConfiguration();
    conf2.set(MRJobConfig.TASK_ATTEMPT_ID, attempt);
    conf2.setInt(MRJobConfig.APPLICATION_ATTEMPT_ID, 2);
    JobContext jContext2 = new JobContextImpl(conf2, taskID.getJobID());
    TaskAttemptContext tContext2 = new TaskAttemptContextImpl(conf2, taskID);
    FileOutputCommitter committer2 = new FileOutputCommitter(outDir, tContext2);
    committer2.setupJob(tContext2);
    Path jobTempDir2 = committer2.getCommittedTaskPath(tContext2);
    File jtd2 = new File(jobTempDir2.toUri().getPath());
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  public void testCommitter() throws Exception {
    Job job = Job.getInstance();
    FileOutputFormat.setOutputPath(job, outDir);
    Configuration conf = job.getConfiguration();
    conf.set(MRJobConfig.TASK_ATTEMPT_ID, attempt);
    JobContext jContext = new JobContextImpl(conf, taskID.getJobID());
    TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID);
    FileOutputCommitter committer = new FileOutputCommitter(outDir, tContext);

    // setup
    committer.setupJob(jContext);
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  public void testMapFileOutputCommitter() throws Exception {
    Job job = Job.getInstance();
    FileOutputFormat.setOutputPath(job, outDir);
    Configuration conf = job.getConfiguration();
    conf.set(MRJobConfig.TASK_ATTEMPT_ID, attempt);
    JobContext jContext = new JobContextImpl(conf, taskID.getJobID());   
    TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID);
    FileOutputCommitter committer = new FileOutputCommitter(outDir, tContext);

    // setup
    committer.setupJob(jContext);
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  public void testAbort() throws IOException, InterruptedException {
    Job job = Job.getInstance();
    FileOutputFormat.setOutputPath(job, outDir);
    Configuration conf = job.getConfiguration();
    conf.set(MRJobConfig.TASK_ATTEMPT_ID, attempt);
    JobContext jContext = new JobContextImpl(conf, taskID.getJobID());
    TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID);
    FileOutputCommitter committer = new FileOutputCommitter(outDir, tContext);

    // do setup
    committer.setupJob(jContext);
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    conf.set(FileSystem.FS_DEFAULT_NAME_KEY, "faildel:///");
    conf.setClass("fs.faildel.impl", FakeFileSystem.class, FileSystem.class);
    conf.set(MRJobConfig.TASK_ATTEMPT_ID, attempt);
    conf.setInt(MRJobConfig.APPLICATION_ATTEMPT_ID, 1);
    FileOutputFormat.setOutputPath(job, outDir);
    JobContext jContext = new JobContextImpl(conf, taskID.getJobID());
    TaskAttemptContext tContext = new TaskAttemptContextImpl(conf, taskID);
    FileOutputCommitter committer = new FileOutputCommitter(outDir, tContext);

    // do setup
    committer.setupJob(jContext);
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    return new TaskAttemptID(jobId.getJtIdentifier(), jobId.getId(), isMap ?  TaskType.MAP : TaskType.REDUCE, taskId, id);
  }

  @Override
  public org.apache.hadoop.mapreduce.JobContext newJobContext(Job job) {
    return new JobContextImpl(job.getConfiguration(), job.getJobID());
  }
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    }

    @Override
    public JobContext createJobContext(Configuration conf,
                                       JobID jobId) {
      return new JobContextImpl(conf instanceof JobConf? new JobConf(conf) : conf,
              jobId);
    }
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