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https://issues.apache.org/jira/browse/HIVE-3898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13556139#comment-13556139
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Hudson commented on HIVE-3898:
------------------------------
Integrated in hive-trunk-hadoop1 #21 (See
[https://builds.apache.org/job/hive-trunk-hadoop1/21/])
HIVE-3898 getReducersBucketing in SemanticAnalyzer may return more than the
max number of reducers (Kevin Wilfong via namit) (Revision 1434623)
Result = ABORTED
namit : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1434623
Files :
* /hive/trunk/build-common.xml
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
*
/hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/hooks/VerifyNumReducersForBucketsHook.java
*
/hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/hooks/VerifyNumReducersHook.java
* /hive/trunk/ql/src/test/queries/clientpositive/bucket_num_reducers.q
* /hive/trunk/ql/src/test/queries/clientpositive/bucket_num_reducers2.q
* /hive/trunk/ql/src/test/results/clientpositive/bucket_num_reducers2.q.out
> getReducersBucketing in SemanticAnalyzer may return more than the max number
> of reducers
> ----------------------------------------------------------------------------------------
>
> Key: HIVE-3898
> URL: https://issues.apache.org/jira/browse/HIVE-3898
> Project: Hive
> Issue Type: New Feature
> Components: Query Processor
> Affects Versions: 0.11.0
> Reporter: Kevin Wilfong
> Assignee: Kevin Wilfong
> Fix For: 0.11.0
>
> Attachments: HIVE-3898.1.patch.txt, HIVE-3898.2.patch.txt
>
>
> getReducersBucketing rounds totalFiles / maxReducers down, when it should be
> rounded up to the nearest integer.
> E.g. if totalFiles = 60 and maxReducers = 21,
> totalFiles / maxReducers = 2
> totalFiles / 2 = 30
> So the job will get 30 reducers, more than maxReducers.
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