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https://issues.apache.org/jira/browse/HIVE-9161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14257218#comment-14257218
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Brock Noland commented on HIVE-9161:
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Hi [~spena],
This looks good to me! I did note one thing related the comments. I believe
[~mohitsabharwal] was suggesting we put the doc comment in the places where we
change a {{HashMap}} to {{LinkedHashMap}} and {{HashSet}} to {{LinkedHashSet}}
as the {{Linked}} versions are the ones which give us deterministic order. Thus
I think we can remove the statements in {{StandardMapObjctInspector}} and add
the comments to the other classes.
Thank you!
> Fix ordering differences on UDF functions due to Java8
> ------------------------------------------------------
>
> Key: HIVE-9161
> URL: https://issues.apache.org/jira/browse/HIVE-9161
> Project: Hive
> Issue Type: Sub-task
> Affects Versions: 0.13.1
> Reporter: Sergio Peña
> Assignee: Sergio Peña
> Attachments: HIVE-9161.1.patch, HIVE-9161.2.patch, HIVE-9161.3.patch
>
>
> Java 8 uses a different hash function for HashMap, which is leading to
> iteration order differences in several cases. (See Java8 vs Java7)
> This part is related to UDF functions.
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