parquet-hive/parquet-hive-storage-handler/src/main/java/org/apache/hadoop/hive/ql/io/parquet/convert/HiveSchemaConverter.java
private static GroupType convertArrayType(final String name, final ListTypeInfo typeInfo) {
    final TypeInfo subType = typeInfo.getListElementTypeInfo();
    return listWrapper(name, listType(), new GroupType(Repetition.REPEATED,
        ParquetHiveSerDe.ARRAY.toString(), convertType("array_element", subType)));
  }
private static GroupType convertArrayType(final String name, final ListTypeInfo typeInfo) {
    final TypeInfo subType = typeInfo.getListElementTypeInfo();
    return listWrapper(name, listType(), new GroupType(Repetition.REPEATED,
        ParquetHiveSerDe.ARRAY.toString(), convertType("array_element", subType)));
  }
1 anonymous element "array_element"