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Date: Sat, 21 Jun 2014 23:27:42 +0800
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 <CAJS6+b6WkhL=RqeVvY+sL+BbVzrHDjZpyOgeoEPRFfrjq_6LWg@mail.gmail.com>
Subject: Re: [VOTE] Release Apache Hadoop 2.4.1
From: Zhijie Shen <zshen@hortonworks.com>
To: "yarn-dev@hadoop.apache.org" <yarn-dev@hadoop.apache.org>
Cc: "mapreduce-dev@hadoop.apache.org" <mapreduce-dev@hadoop.apache.org>,
 hdfs dev <hdfs-dev@hadoop.apache.org>,
	"common-dev@hadoop.apache.org" <common-dev@hadoop.apache.org>
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Sounds good to me. Remove MAPREDUCE-5831 out of the scope of 2.4.1.


On Sat, Jun 21, 2014 at 2:29 AM, Arun C Murthy <acm@hortonworks.com> wrote:

> On Jun 20, 2014, at 11:23 AM, Vinod Kumar Vavilapalli <vinodkv@apache.org>
> wrote:
>
> > Unfortunately even though we documented wire compatiblity, cross-version
> > client/server support doesn't yet really work for YARN and MapReduce. We
> > can only do that once we have wire-compatibility and eventually rolling
> > upgrades. No fix is in sight for MAPREDUCE-5831 - for now both clients
> and
> > AMs have to upgrade together in the MapReduce land..
>
>
> Actually, that is a reasonable expectation - particularly because we
> should all be migrating towards MAPREDUCE-4421 and should stop installing
> MR on every node.
>
> Arun
>
> >
> > +Vinod
> >
> > On Wed, Jun 18, 2014 at 6:52 PM, Zhijie Shen <zshen@hortonworks.com>
> wrote:
> >
> >> Point to another MR compatibility issue marked for 2.4.1: MAPREDUCE-5831
> >> Old MR client is not compatible with new MR application, though it
> happens
> >> since 2.3.
> >>
> >> It would be good to figure out whether we include it now or later. It
> seems
> >> that we're going to be in a better position once we have versioning for
> MR
> >> components.
> >>
> >
> > --
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> --
> Arun C. Murthy
> Hortonworks Inc.
> http://hortonworks.com/hdp/
>
>
>
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-- 
Zhijie Shen
Hortonworks Inc.
http://hortonworks.com/

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