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From Sean Owen <>
Subject Re: Install mahout 0.8 with hadoop 2.0
Date Tue, 13 Aug 2013 17:13:07 GMT
I think it all minimally works on Hadoop 2.0.x, though I haven't tried
it recently -- it does require a recompile.

This is different from it working on MRv2 versus MRv1. I'm almost
certain it does not work on MRv2 and doubt it will.

The effort is not large, but it's subtle. A few hacks may fail in
mysterious ways, and certainly to properly use MRv2 you have to switch
to use the newer resource configuration scheme -- in terms of
megabytes not reducer slots and all that.

At least this was most of the work that i remember when I was
rebuilding some of this type of stuff on MRv2 + Hadoop 2.0.x

On Tue, Aug 13, 2013 at 5:58 PM, Ted Dunning <> wrote:
> No.  There is very small demand for Mahout on Hadoop 2.0 so far and the
> forward/backward incompatibility of 2.0 has made it difficult to motivate
> moving to 2.0.
> The bigtop guys built a maven profile for 0.23 some time ago.  I don't know
> the status of that.
> I don't think that the differences are huge ... it is just the standard
> Hadoop forklift-the-world upgrade experience.
> On Tue, Aug 13, 2013 at 6:49 AM, Sergey Svinarchuk <
>> wrote:
>> Hi all,
>> Somebody compile and install mahout with hadoop 2.0? If yes, that what
>> changes you make in mahout, that it have 100% passed unit tests and
>> successful work with hadoop 2.0?
>> Thanks

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