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https://issues.apache.org/jira/browse/ARROW-7273?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-7273.
---------------------------------
Resolution: Fixed
Issue resolved by pull request 7562
[https://github.com/apache/arrow/pull/7562]
> [Python] Non-nullable null field is allowed / crashes when writing to parquet
> -----------------------------------------------------------------------------
>
> Key: ARROW-7273
> URL: https://issues.apache.org/jira/browse/ARROW-7273
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++, Python
> Reporter: Joris Van den Bossche
> Assignee: Wes McKinney
> Priority: Major
> Labels: parquet, pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> It seems to be possible to create a "non-nullable null field". While this
> does not make any sense (so already a reason to disallow this I think), this
> can also lead to crashed in further operations, such as writing to parquet:
> {code}
> In [18]: table = pa.table([pa.array([None, None], pa.null())],
> schema=pa.schema([pa.field('a', pa.null(), nullable=False)]))
> In [19]: table
> Out[19]:
> pyarrow.Table
> a: null not null
> In [20]: pq.write_table(table, "test_null.parquet")
> WARNING: Logging before InitGoogleLogging() is written to STDERR
> F1128 14:08:30.267439 27560 column_writer.cc:837] Check failed: (nullptr) !=
> (values)
> *** Check failure stack trace: ***
> Aborted (core dumped)
> {code}
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