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Vinod Kumar Vavilapalli commented on MAPREDUCE-3667:
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bq. Hadoop 0.20.204 reducers does not goes OOM, I have seen this in Hadoop.Next
only.
That is right, Karam. We would ideally want YARN+MR to be able to run with the
same configuration. Unfortunately mrv2 reduce runtime has changed a lot, and it
performs better in so many other situations but worse in this particular case.
The implementation has changed in such a way that supporting 0.7 is not
possible with the current set of jobs in gridmix without running into OOM.
I agree that it is a regression but for now this should be fine. We'd ideally
want to fix this, will open a separate ticket, but the timelines for that fix
are uncertain at this point.
> Gridmix jobs are failing with OOM in reduce shuffle phase.
> ----------------------------------------------------------
>
> Key: MAPREDUCE-3667
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3667
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Amol Kekre
> Priority: Blocker
> Fix For: 0.23.1
>
>
> Roll up bug for gridmix3 benchmark
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