@Override
  public RecordWriter<NullWritable, DruidWritable> getRecordWriter(
          FileSystem ignored, JobConf job, String name, Progressable progress
  ) throws IOException {
    throw new UnsupportedOperationException("please implement me !");
  }
Druid Output format class used to write data as Native Druid Segment.
druid-handler/src/java/org/apache/hadoop/hive/druid/io/DruidOutputFormat.java