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https://issues.apache.org/jira/browse/ARROW-664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15932086#comment-15932086
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Wes McKinney commented on ARROW-664:
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No, it is simply an oversight. Since we run the unit test suite with valgrind
we would have seen this if we had any test cases which examine the padding
region.
> Make C++ Arrow serialization deterministic
> ------------------------------------------
>
> Key: ARROW-664
> URL: https://issues.apache.org/jira/browse/ARROW-664
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 0.2.0
> Reporter: Philipp Moritz
> Assignee: Philipp Moritz
> Priority: Minor
> Fix For: 0.3.0
>
>
> In C++ arrow it can currently occur that uninitialized data created by the
> builders is written to IPC memory. The goal of this issue is to identify
> these cases and set the memory to zero.
> Note that most of these cases have already been identified by valgrind and
> fixed in the past.
> Some of the considerations and benefits are discussed in this github PR:
> https://github.com/apache/arrow/pull/397
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