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https://issues.apache.org/jira/browse/MAPREDUCE-5156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13648586#comment-13648586
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Vinod Kumar Vavilapalli commented on MAPREDUCE-5156:
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bq. I just wanted to make sure we are all aware that breaking compatibility
with Hadoop 2 often means breaking compatibility with Hadoop 0.23 as well and
should not be done lightly.
Thanks for pointing this one, Jason, I definitely missed it!
Now, in this particular case, as you mentioned we are perhaps okay.
We should definitely look at it on a case-by-case basis, but it will be
interesting to figure out in some cases how to decide which one to support and
which one to break - 1.x or 0.23.
I request you to follow all the JIRAs under MAPREADUCE-5108, I'll also keep an
eye on the 0.23 stuff. Tx!
> Hadoop-examples-1.x.x.jar cannot run on Yarn
> --------------------------------------------
>
> Key: MAPREDUCE-5156
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5156
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Reporter: Zhijie Shen
> Assignee: Zhijie Shen
> Priority: Blocker
> Attachments: MAPREDUCE-5156.1.patch, MAPREDUCE-5156.2.patch
>
>
> M/R examples are run through ProgramDriver.driver. ProgramDriver.driver
> returns void in hadoop-1, while it returns int in hadoop-2. Therefore, the
> function signatures in the example jar and yarn are incompatible.
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