public void initialize(InputSplit genericSplit, TaskAttemptContext context) throws IOException {
      FileSplit split = (FileSplit) genericSplit;
      Configuration job = context.getConfiguration();
      m_Sb.setLength(0);
      m_Start = split.getStart();
      m_End = m_Start + split.getLength();
      final Path file = split.getPath();
      compressionCodecs = new CompressionCodecFactory(job);
      final CompressionCodec codec = compressionCodecs.getCodec(file);

      // open the file and seek to the m_Start of the split
      FileSystem fs = file.getFileSystem(job);
      //  getFileStatus fileStatus = fs.getFileStatus(split.getPath());
      //noinspection deprecation
      @SuppressWarnings(value = "deprecated")
      long length = fs.getLength(file);
      FSDataInputStream fileIn = fs.open(split.getPath());
      if (m_Start > 0) fileIn.seek(m_Start);
      if (codec != null) {
        CompressionInputStream inputStream = codec.createInputStream(fileIn);
        m_Input = new BufferedReader(new InputStreamReader(inputStream));
        m_End = length;
      } else {
        m_Input = new BufferedReader(new InputStreamReader(fileIn));
      }
      m_Current = m_Start;
      m_Key = split.getPath().getName();
    }
 public static int readInt(Path path, Configuration conf) throws IOException {
   FileSystem fs = FileSystem.get(path.toUri(), conf);
   //FileSystem fs = path.getFileSystem(conf);
   FSDataInputStream in = fs.open(path);
   try {
     return in.readInt();
   } finally {
     in.close();
   }
 }