public List<InputSplit> getSplits(JobContext job) throws IOException {
    StopWatch sw = new StopWatch().start();
    long minSize = Math.max(getFormatMinSplitSize(), getMinSplitSize(job));
    long maxSize = getMaxSplitSize(job);

    // generate splits
    List<InputSplit> splits = new ArrayList<InputSplit>();
    List<FileStatus> files = listStatus(job);

    boolean ignoreDirs = !getInputDirRecursive(job)
      && job.getConfiguration().getBoolean(INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS, false);
    for (FileStatus file: files) {
      if (ignoreDirs && file.isDirectory()) {
        continue;
      }
      Path path = file.getPath();
      long length = file.getLen();
      if (length != 0) {
        BlockLocation[] blkLocations;
        if (file instanceof LocatedFileStatus) {
          blkLocations = ((LocatedFileStatus) file).getBlockLocations();
        } else {
          FileSystem fs = path.getFileSystem(job.getConfiguration());
          blkLocations = fs.getFileBlockLocations(file, 0, length);
        }
        if (isSplitable(job, path)) {
          long blockSize = file.getBlockSize();
          long splitSize = computeSplitSize(blockSize, minSize, maxSize);

          long bytesRemaining = length;
          while (((double) bytesRemaining)/splitSize > SPLIT_SLOP) {
            int blkIndex = getBlockIndex(blkLocations, length-bytesRemaining);
            splits.add(makeSplit(path, length-bytesRemaining, splitSize,
                        blkLocations[blkIndex].getHosts(),
                        blkLocations[blkIndex].getCachedHosts()));
            bytesRemaining -= splitSize;
          }

          if (bytesRemaining != 0) {
            int blkIndex = getBlockIndex(blkLocations, length-bytesRemaining);
            splits.add(makeSplit(path, length-bytesRemaining, bytesRemaining,
                       blkLocations[blkIndex].getHosts(),
                       blkLocations[blkIndex].getCachedHosts()));
          }
        } else { // not splitable
          if (LOG.isDebugEnabled()) {
            // Log only if the file is big enough to be splitted
            if (length > Math.min(file.getBlockSize(), minSize)) {
              LOG.debug("File is not splittable so no parallelization "
                  + "is possible: " + file.getPath());
            }
          }
          splits.add(makeSplit(path, 0, length, blkLocations[0].getHosts(),
                      blkLocations[0].getCachedHosts()));
        }
      } else { 
        //Create empty hosts array for zero length files
        splits.add(makeSplit(path, 0, length, new String[0]));
      }
    }
    // Save the number of input files for metrics/loadgen
    job.getConfiguration().setLong(NUM_INPUT_FILES, files.size());
    sw.stop();
    if (LOG.isDebugEnabled()) {
      LOG.debug("Total # of splits generated by getSplits: " + splits.size()
          + ", TimeTaken: " + sw.now(TimeUnit.MILLISECONDS));
    }
    return splits;
  }
@Test
  public void testNumInputFilesRecursively() throws Exception {
    Configuration conf = getConfiguration();
    conf.set(FileInputFormat.INPUT_DIR_RECURSIVE, "true");
    conf.setInt(FileInputFormat.LIST_STATUS_NUM_THREADS, numThreads);
    Job job = Job.getInstance(conf);
    FileInputFormat<?, ?> fileInputFormat = new TextInputFormat();
    List<InputSplit> splits = fileInputFormat.getSplits(job);
    Assert.assertEquals("Input splits are not correct", 3, splits.size());
    verifySplits(Lists.newArrayList("test:/a1/a2/file2", "test:/a1/a2/file3",
        "test:/a1/file1"), splits);

    // Using the deprecated configuration
    conf = getConfiguration();
    conf.set("mapred.input.dir.recursive", "true");
    job = Job.getInstance(conf);
    splits = fileInputFormat.getSplits(job);
    verifySplits(Lists.newArrayList("test:/a1/a2/file2", "test:/a1/a2/file3",
        "test:/a1/file1"), splits);
  }