@Override public Parser<String, Object> makeParser() {
    // makeParser is only used by StringInputRowParser, which cannot parse avro anyway.
    throw new UnsupportedOperationException("makeParser not supported");
  }
This class is copied from druid source code
in order to avoid adding additional dependencies on druid-indexing-service.
druid-handler/src/java/org/apache/hadoop/hive/druid/json/AvroParseSpec.java