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https://issues.apache.org/jira/browse/ARROW-2744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16523971#comment-16523971
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Antoine Pitrou commented on ARROW-2744:
---------------------------------------
Perhaps one clean way of solving this would be to add a Normalize feature to
ArrayData such that:
* all buffers except buffers[0] must be non-null
* if a buffer is null (with index > 0, i.e. not the null bitmap), it is
replaced with an empty buffer
* normalizing is run recursively on child data
Creating an Array from an ArrayData would automatically normalize the ArrayData.
> [Python] Writing to parquet crashes when writing a ListArray of empty lists
> ----------------------------------------------------------------------------
>
> Key: ARROW-2744
> URL: https://issues.apache.org/jira/browse/ARROW-2744
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.9.0
> Environment: Python Version: 3.6.3 (Anaconda)
> OS: OSX and Linux
> Reporter: Anton Daitche
> Assignee: Antoine Pitrou
> Priority: Major
> Fix For: 0.10.0
>
>
> When writing a ListArray which contains only empty lists to Parquet, Pyarrow
> crashes. Here is a minimal code snippet which reproduces the crash:
> {code:java}
> import pyarrow as pa
> from pyarrow import parquet as pq
> array = pa.array([[]], type=pa.list_(pa.int32()))
> table = pa.Table.from_arrays([array], ["A"])
> pq.write_table(table, "tmp.parq"){code}
> When the ListArray has at least one non-empty list, the issue disappears.
>
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