private void commonInit(Path filePath, Configuration conf) throws IOException {

    readerPosition = start;

    FileSystem fs = filePath.getFileSystem(conf);
    inputReader = new BufferedReader(new InputStreamReader(fs.open(filePath)));

    if (start != 0) {
      // split starts inside the json
      inputReader.skip(start);
      moveToRecordStart();
    }

  }
Enumerates records from an Unenclosed JSON file - use either Esri JSON or GeoJSON subclass
ql/src/java/org/apache/hadoop/hive/ql/io/esriJson/UnenclosedBaseJsonRecordReader.java