code: public static void convert(RecordReader reader, RecordWriter writer) throws IOException {
          convert(reader, writer, true);
      }
docs: Write all values from the specified record reader to the specified record writer.
  Closes the record writer on completion
  
  @param reader Record reader (source of data)
  @param writer Record writer (location to write data)
  @throws IOException If underlying reader/writer throws an exception