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https://issues.apache.org/jira/browse/ARROW-14718?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chao Sun resolved ARROW-14718.
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Fix Version/s: 7.0.0
Resolution: Fixed
Issue resolved by pull request 11709
[https://github.com/apache/arrow/pull/11709]
> [Java] loadValidityBuffer should avoid allocating memory when input is not
> null and there are only null or non-null values
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: ARROW-14718
> URL: https://issues.apache.org/jira/browse/ARROW-14718
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Java
> Reporter: Chao Sun
> Assignee: Chao Sun
> Priority: Major
> Labels: pull-request-available
> Fix For: 7.0.0
>
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> Currently in {{BitVectorHelper.loadValidityBuffer}}, we always allocate
> memory when the source vector contains only null or non-null values. However,
> as the format also allows allocating validity buffer even if all values are
> null or not-null, the method should also consider whether the input validity
> buffer is null or not, and avoiding allocating new buffer when it is latter.
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