see: https://github.com/Parquet/parquet-mr/blob/9bf8c597374209f475de3dc906d76f1296f90639/parquet-hadoop/src/main/java/parquet/hadoop/ParquetOutputFormat.java#L209
now we have extension = ".parquet.snappy.parquet"
just change line 223 to be "extension = codec.getExtension() + extension;" to change the order