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https://issues.apache.org/jira/browse/HIVE-2084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13449528#comment-13449528
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Andy Jefferson commented on HIVE-2084:
--------------------------------------
Obviously DataNucleus has testcases that persist Maps with null values, and
they work (since all tests pass with every release), so clearly down to your
map and how you're doing things.
> Upgrade datanucleus from 2.0.3 to 3.0.1
> ---------------------------------------
>
> Key: HIVE-2084
> URL: https://issues.apache.org/jira/browse/HIVE-2084
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Ning Zhang
> Assignee: Sushanth Sowmyan
> Labels: datanucleus
> Attachments: ASF.LICENSE.NOT.GRANTED--HIVE-2084.D2397.1.patch,
> HIVE-2084.1.patch.txt, HIVE-2084.2.patch.txt, HIVE-2084.patch
>
>
> It seems the datanucleus 2.2.3 does a better join in caching. The time it
> takes to get the same set of partition objects takes about 1/4 of the time it
> took for the first time. While with 2.0.3, it took almost the same amount of
> time in the second execution. We should retest the test case mentioned in
> HIVE-1853, HIVE-1862.
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