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https://issues.apache.org/jira/browse/ARROW-11629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17310390#comment-17310390
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Micah Kornfield commented on ARROW-11629:
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[~matthros] Sorry, one more question. If you you reduce the number of rows
written does it still fail with the other tools? I'll try to get parquet MR
setup on my machine but it might take me a while.
> [C++] Writing float32 values with "Dictionary Encoding" makes parquet files
> not readable for some tools
> -------------------------------------------------------------------------------------------------------
>
> Key: ARROW-11629
> URL: https://issues.apache.org/jira/browse/ARROW-11629
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++, Python
> Affects Versions: 3.0.0
> Reporter: Matthias Rosenthaler
> Priority: Major
> Attachments: foo.parquet, image-2021-02-15-15-49-41-908.png,
> output.csv, output.parquet
>
>
> If I try to read the attached csv file with pyarrow, changing the float64
> columns to float32 and export it to parquet, the parquet file gets corrupted.
> It is not readable for apache drill or Parquet.Net any longer.
>
> Update: Bug in "*Dictionary Encoding*" feature. If I switch it off for
> float32 columns, everything works as expected.
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