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https://issues.apache.org/jira/browse/MAPREDUCE-5478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13749015#comment-13749015
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Hudson commented on MAPREDUCE-5478:
-----------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #4317 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/4317/])
MAPREDUCE-5478. TeraInputFormat unnecessarily defines its own FileSplit
subclass (Sandy Ryza) (sandy:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1517046)
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-examples/src/main/java/org/apache/hadoop/examples/terasort/TeraInputFormat.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-examples/src/main/java/org/apache/hadoop/examples/terasort/TeraScheduler.java
> TeraInputFormat unnecessarily defines its own FileSplit subclass
> ----------------------------------------------------------------
>
> Key: MAPREDUCE-5478
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5478
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: examples
> Affects Versions: 2.1.0-beta
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Priority: Minor
> Fix For: 2.1.1-beta
>
> Attachments: MAPREDUCE-5478.patch
>
>
> TeraInputFormat defines its own TeraFileSplit subclass of FileSplit that adds
> a locations field, which is already included in FileSplit.
> This is causing MR2 TeraSort to fail on MR1, which, for a System.arraycopy,
> requires splits to be of the FileSplit class. While nobody is promising that
> everything that runs on MR2 should run on MR1, fixing this would be easy and
> make it possible to compare MR2 TeraSort performance between MR1 and MR2.
> We should just get rid of TeraFileSplit and use FileSplit.
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