private void run_sequential() throws Exception {
    //        ObjectSerializerUtil serializer = new JavaObjectSerializerUtil();
    ObjectSerializerUtil serializer = new KryoObjectSerializerUtil();

    File obj_folder = new File(AppConstants.ABS_OBJECTS_FOLDER);
    List<File> files = getSortedFilesInAFolder_Integer_Sort(obj_folder);
    for (File f : files) {
      ArrayList<LogData> lds = serializer.read(f);
      processAndWriteEachBatch(lds);
    }
  }
 private void readEachFile(File _f) throws Exception {
   // System.out.println("Thread - " + runEach + " : Reading file > " + _f.getName());
   ArrayList<LogData> lds = serializer.read(_f);
   QUEUE.add(lds);
 }