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From Sean Busbey <bus...@cloudera.com>
Subject Re: [DISCUSS] Additional maintenance releases for Hadoop 2.y versions
Date Wed, 15 Jul 2015 19:16:34 GMT
Why not just have the discussion here? It seems integral to the matter of
having more maintenance releases on those versions.

On Wed, Jul 15, 2015 at 11:39 AM, Karthik Kambatla <kasha@cloudera.com>
wrote:

> I believe there was general consensus to do more maintenance releases, as
> witnessed in the other thread.
>
> There have been discussions on what should go into 2.x.1, 2.x.2, etc., but
> I don't think we have a clear proposal. It would be nice to put that
> together, so committers know where all to commit patches to. Otherwise,
> release managers will have to look through branch-2 and pull in the fixes.
> Either approach is fine by me, but would be nice to start a [DISCUSS]
> thread on how to go about this.
>
> Any takers?
>
> On Wed, Jul 15, 2015 at 8:57 AM, Sangjin Lee <sjlee0@gmail.com> wrote:
>
> > Strong +1 for having a 2.6.1 release. I understand Vinod has been trying
> to
> > get that effort going but it's been stalled a little bit. It would be
> good
> > to rekindle that effort.
> >
> > Companies with big hadoop 2.x deployments (including mine) have always
> > tried to stabilize a 2.x release by testing/collecting/researching
> critical
> > issues on the release. Each would come up with its own set of fixes to
> > backport. We would also communicate it via offline channels. During the
> > hadoop summit, we thought it would be great if we all came together and
> > create a public stability/bugfix release on top of 2.x (2.6.1 for 2.6 for
> > example) with all the critical issues fixed.
> >
> > Thanks,
> > Sangjin
> >
> >
> > On Tue, Jul 14, 2015 at 10:42 PM, Tsuyoshi Ozawa <ozawa@apache.org>
> wrote:
> >
> > > Thank you for the notification. Trying to back port bug fixes.
> > >
> > > - Tsuyoshi
> > >
> > > On Wed, Jul 15, 2015 at 3:45 AM, Sean Busbey <busbey@cloudera.com>
> > wrote:
> > > > Hi Hadoopers!
> > > >
> > > > Over in HBase we've been discussing the impact of our dependencies on
> > our
> > > > downstream users. As our most fundamental dependency, Hadoop plays a
> > big
> > > > role in the operational cost of running an HBase instance.
> > > >
> > > > Currently the HBase 1.y release line supports Hadoop 2.4, 2.5, and
> > > 2.6[1].
> > > > We don't drop Hadoop minor release lines in minor releases so we are
> > > > unlikely remove anything from this set until HBase 2.0, probably at
> the
> > > end
> > > > of 2015 / start of 2016 (and currently we plan to continue supporting
> > at
> > > > least 2.4 for HBase 2.0 [2]). Lately we've been discussing updating
> our
> > > > shipped binaries to Hadoop 2.6, following some stability testing by
> > part
> > > of
> > > > our community[3]. Unfortunately, 2.6.0 in particular has a couple of
> > bugs
> > > > that could destroy HBase clusters should users decide to turn on HDFS
> > > > encryption[4]. Our installation instructions tell folks to replace
> > these
> > > > jars with the version of Hadoop they are actually running, but not
> all
> > > > users follow those instructions so we want to minimize the pain for
> > them.
> > > >
> > > > Regular maintenance releases are key to keeping operational burdens
> low
> > > for
> > > > our downstream users; we don't want them to be forced to choose
> between
> > > > living with broken systems and stomaching the risk of upgrades across
> > > > minor/major version numbers. Looking back over the three
> aforementioned
> > > > Hadoop versions, 2.6 hasn't had a patch release since 2.6.0 came out
> in
> > > Nov
> > > > 2014, when 2.5 had its last patch release as well. Hadoop 2.4 looks
> to
> > > be a
> > > > year without a release[5]. On our discussion of shipping Hadoop 2.6
> > > > binaries, one of your PMC members mentioned that with continued work
> on
> > > the
> > > > 2.7 line y'all weren't planning any additional releases of the
> earlier
> > > > minor versions[6].
> > > >
> > > > The HBase community requests that Hadoop pick up making bug-fix-only
> > > patch
> > > > releases again on a regular schedule[7]. Preferably on the 2.6 line
> and
> > > > preferably monthly. We realize that given the time gap since 2.6.0 it
> > > will
> > > > likely take a big to get 2.6.1 together, but after that it should
> take
> > > much
> > > > less effort to continue.
> > > >
> > > > [1]: http://hbase.apache.org/book.html#hadoop
> > > > [2]: http://s.apache.org/ReP
> > > > [3]: HBASE-13339
> > > > [4]: HADOOP-11674 and HADOOP-11710
> > > > [5]: http://hadoop.apache.org/releases.html
> > > > [6]: http://s.apache.org/MTY
> > > > [7]: http://s.apache.org/ViP
> > > >
> > > > --
> > > > Sean
> > >
> >
>
>
>
> --
> Karthik Kambatla
> Software Engineer, Cloudera Inc.
> --------------------------------------------
> http://five.sentenc.es
>



-- 
Sean

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