Francois Saint-Jacques reassigned ARROW-7061:

    Assignee: Francois Saint-Jacques

> [C++][Dataset] FileSystemDiscovery with ParquetFileFormat should ignore files 
> that aren't Parquet
> -------------------------------------------------------------------------------------------------
>                 Key: ARROW-7061
>                 URL: https://issues.apache.org/jira/browse/ARROW-7061
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++ - Dataset
>            Reporter: Neal Richardson
>            Assignee: Francois Saint-Jacques
>            Priority: Major
> I got {{Invalid parquet file. Corrupt footer.}} trying to read real data. 
> Turned out it was because I had opened the directory in macOS Finder and it 
> had added the junk .DS_Store files. Once I deleted them, the Dataset created 
> fine. 
> If we're creating a DataSource with Parquet files, we should ignore any 
> non-Parquet files we encounter when scanning.

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