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https://issues.apache.org/jira/browse/ARROW-12965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17422362#comment-17422362
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Roee Shlomo commented on ARROW-12965:
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We noticed that for UnionArray the cpp implementation includes a validity
buffer although it shouldn't be there according to the specification. In the
arrow2 rust implementation a workaround is used (in the FFI code for Union an
empty validity buffer is explicitly added). To me it sounds like a bug that
should be resolved in arrow-cpp instead. [~apitrou] Should we try to workaround
it in Java too or open a bug ticket?
> [Java][C++] Java implementation of Arrow C data interface
> ---------------------------------------------------------
>
> Key: ARROW-12965
> URL: https://issues.apache.org/jira/browse/ARROW-12965
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Java
> Reporter: Hongze Zhang
> Priority: Major
> Labels: pull-request-available
> Time Spent: 12h 10m
> Remaining Estimate: 0h
>
> As mentioned in ARROW-7272 or in PR
> https://github.com/apache/arrow/pull/10201, it would be valuable to have the
> Arrow C data interface implemented in Java to provide better inter-process
> data sharing facility without depending on 3rd party serialization protocols.
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