code: public RDD<Cells> createHDFSRDD(ExtractorConfig<Cells> config) {
  
          Serializable host = config.getValues().get(ExtractorConstants.HOST);
          Serializable port = config.getValues().get(ExtractorConstants.PORT);
          Serializable path = config.getValues().get(ExtractorConstants.FS_FILE_PATH);
  
          final TextFileDataTable textFileDataTable = UtilFS.createTextFileMetaDataFromConfig(config, this);
  
          String filePath = path.toString();
          if (config.getExtractorImplClassName().equals(ExtractorConstants.HDFS)) {
              filePath = ExtractorConstants.HDFS_PREFIX + host.toString() + ":" + port + path.toString();
          }
  
          return createRDDFromFilePath(filePath, textFileDataTable);
      }
docs: Returns a Cells RDD from HDFS.
  @param config HDFS ExtractorConfig.
  @return Cells RDD.