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From "Andy Jefferson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2084) Upgrade datanucleus from 2.0.3 to 3.0.1
Date Mon, 16 Jul 2012 06:52:35 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13414882#comment-13414882
] 

Andy Jefferson commented on HIVE-2084:
--------------------------------------

No idea what your "table not found" problem is, but if this is at startup logic would suggest
passing all classes to DataNucleus via an auto-start mechanism, or using a persistence.xml.
If using persistence.xml then make sure you also have persistence property "datanucleus.PersistenceUnitLoadClasses"
set to true. That way, all classes are known about once started, and the store knows about
these classes too (hence knows of their tables). There are no outstanding issues reported
around tables not being found, so if you have something then you need to generate a reproduceable
testcase and report it.

DataNucleus 2.x versions haven't been supported for some time. DataNucleus 3.0 is now not
being updated (except for commercial requests), since DataNucleus 3.1 will be out in <
2 weeks.
                
> 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: HIVE-2084.1.patch.txt, HIVE-2084.2.patch.txt, HIVE-2084.D2397.1.patch,
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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