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https://issues.apache.org/jira/browse/HIVE-4540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13668278#comment-13668278
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Hudson commented on HIVE-4540:
------------------------------
Integrated in Hive-trunk-h0.21 #2121 (See
[https://builds.apache.org/job/Hive-trunk-h0.21/2121/])
HIVE-4540 JOIN-GRP BY-DISTINCT fails with NPE when mapjoin.mapreduce=true
(Gunther Hagleitner via Navis) (Revision 1486721)
Result = FAILURE
navis : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1486721
Files :
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/CommonJoinTaskDispatcher.java
* /hive/trunk/ql/src/test/queries/clientpositive/auto_join33.q
* /hive/trunk/ql/src/test/results/clientpositive/auto_join33.q.out
* /hive/trunk/ql/src/test/results/clientpositive/multiMapJoin1.q.out
> JOIN-GRP BY-DISTINCT fails with NPE when mapjoin.mapreduce=true
> ---------------------------------------------------------------
>
> Key: HIVE-4540
> URL: https://issues.apache.org/jira/browse/HIVE-4540
> Project: Hive
> Issue Type: Bug
> Reporter: Gunther Hagleitner
> Assignee: Gunther Hagleitner
> Fix For: 0.12.0
>
> Attachments: HIVE-4540.1.patch
>
>
> If the mapjoin.mapreduce optimization kicks in on a query of this form:
> {noformat}
> select count(distinct a.v)
> from a join b on (a.k = b.k)
> group by a.g
> {noformat}
> The planer will NPE in the metadataonly optimizer.
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