Parquet file reader - taking a long time

[mlauber71]

I would not call it a known issue but there were some reports of problems with parquet and KNIME before and I had some strange issues that I was not able to systematically reproduce.

Also I had the impression that when I used parquet as the internal storage I had problems on my Mac (the Column store approach with Parquet is still marked “experimental”).

Today I had the short impression that one Parquet file I used had misplaced some columns, I had not investigated further since a colleague was able to use it without issue.

Parquet Reader error

Could you share more details this is now the third report about problems with the parquet reader. Could be worth exploring further.

Parquet Reader dropping values

I ha da similar issue with the Parquet reader on windows. It seemed as if it had stored values from a previous load and was still working with them. On one occasion several reloads helped and then to delete the reader and load a new one. Something could be wrong with the reader, which is bad because the parquet format should be some kind of standard.