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https://issues.apache.org/jira/browse/DRILL-5385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15998318#comment-15998318
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ASF GitHub Bot commented on DRILL-5385:
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Github user asfgit closed the pull request at:
https://github.com/apache/drill/pull/800
> Vector serializer fails to read saved SV2
> -----------------------------------------
>
> Key: DRILL-5385
> URL: https://issues.apache.org/jira/browse/DRILL-5385
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.8.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Labels: ready-to-commit
> Fix For: 1.11.0
>
>
> Drill provides the {{VectorAccessibleSerializable}} class to write a record
> batch to a stream, and to read that batch from a stream. Record batches can
> carry an indirection vector (a so-called selection vector 2 or SV2).
> The code to write batches writes the SV2 to the stream. But, the code to
> deserialize batches initializes, but does not read, the SV2 from the stream.
> The result is that vector deserialization reads the wrong bytes and the saved
> values are corrupted on read.
> Note that this issue was found via unit testing. At present, the only
> production use of this code is in the external sort, which serializes batches
> without an indirection vector.
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