hi @ben,
Here is the result of parquet-tools meta execution for a file that Dremio fails to open :
20190806-bt-KO_DREMIO_snappy_parquet_metadata.txt.zip (3.3 KB)
And other file generated the same day in the same way with other data that Dremio manages to open :
20190806-wtb-OK_DREMIO_snappy-parquet-metadata.txt.zip (3.8 KB)
Those files have been written using library pyarrow version 0.13 using method write_table of module pyarrow.parquet.
Both of them can be read with Dremio 3.1.11
I would be happy to provide you with those files in a private way.