[jira] [Commented] (ARROW-10937) ArrowInvalid error on reading partitioned parquet files from S3 (arrow-2.0.0)

["Antoine Pitrou (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-10937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17285955#comment-17285955 ] 

Antoine Pitrou commented on ARROW-10937:
----------------------------------------

Does this need to be kept open? It seems the ARROW-10998 covers the "better error message" issue.

> ArrowInvalid error on reading partitioned parquet files from S3 (arrow-2.0.0)
> -----------------------------------------------------------------------------
>
>                 Key: ARROW-10937
>                 URL: https://issues.apache.org/jira/browse/ARROW-10937
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>    Affects Versions: 2.0.0
>            Reporter: Vladimir
>            Assignee: Joris Van den Bossche
>            Priority: Major
>             Fix For: 4.0.0
>
>
> Hello
> It looks like pyarrow-2.0.0 could not read partitioned datasets from S3 buckets: 
> {code:java}
> import s3fs
> import pyarrow as pa
> import pyarrow.parquet as pq
> filesystem = s3fs.S3FileSystem()
> d = pd.date_range('1990-01-01', freq='D', periods=10000)
> vals = np.random.randn(len(d), 4)
> x = pd.DataFrame(vals, index=d, columns=['A', 'B', 'C', 'D'])
> x['Year'] = x.index.year
> table = pa.Table.from_pandas(x, preserve_index=True)
> pq.write_to_dataset(table, root_path='s3://bucket/test_pyarrow.parquet', partition_cols=['Year'], filesystem=filesystem)
> {code}
>  
>  Now, reading it via pq.read_table:
> {code:java}
> pq.read_table('s3://bucket/test_pyarrow.parquet', filesystem=filesystem, use_pandas_metadata=True)
> {code}
> Raises exception: 
> {code:java}
> ArrowInvalid: GetFileInfo() yielded path 'bucket/test_pyarrow.parquet/Year=2017/ffcc136787cf46a18e8cc8f72958453f.parquet', which is outside base dir 's3://bucket/test_pyarrow.parquet'
> {code}
>  
> Direct read in pandas:
> {code:java}
> pd.read_parquet('s3://bucket/test_pyarrow.parquet'){code}
> returns empty DataFrame.
>  
> The issue does not exist in pyarrow-1.0.1



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