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From Konstantin Shvachko <shv.had...@gmail.com>
Subject Re: [VOTE] Release hadoop-0.22.0-rc0
Date Fri, 02 Dec 2011 09:15:52 GMT
This is a well tested state of the branch, which imo worth releasing.
Adding changes at this point will invalidate the testing.
0.23 has "substantial regressions from the stable line" as well, and
is not stable.
1.0 does not have important features including some in MR that 0.22 has.
What is a regression!

0.22 is progress in at least one area, which is HDFS.
People can actually start appending data to files, use links, and
build features (e.g. HA) based on BackupNode.
HBase clusters should not be segregated anymore as HBase-only ones,
but will allow general load as well.

Speaking of confusing. What isn't in Hadoop this days. Say, when you
transition from Hadoop 1.0 to 0.22 or 0.23 you call it upgrade.

Seriously. This project needs to move forward beyond the 0.20 line. I
tested 0.22 in the last three months and found it working with HBase,
Hive, Pig, Cascading, Zookeeper, Oozie. What else do you need to
release? It is not perfect? Agreed. Have anybody seen a perfect piece
of software? I haven't.

Eric, thank you for raising the question. It is important to
understand the pros and cons of different versions.
You should try the candidate, who knows it might just work for you.


On Thu, Dec 1, 2011 at 10:26 PM, Eric Baldeschwieler
<eric14@hortonworks.com> wrote:
> So this release contains substantial regressions from the stable line and contains a
subset of features in 0.23.
> Wouldn't it be prudent to wait until the branch is compelling when compared to one of
the other release lines before releasing?  Otherwise this just seems confusing.
> ---
> E14 - typing on glass
> On Dec 1, 2011, at 6:10 PM, Konstantin Boudnik <cos@apache.org> wrote:
>> +1
>> Checksum are correct, license is in place
>> Single node cluster (Ubuntu 11.04) installation and a mapreduce job worked
>> without any issues.
>> Cos
>> On Tue, Nov 29, 2011 at 02:47AM, Konstantin Shvachko wrote:
>>> I created a release candidate for hadoop-0.22.0 available for review at:
>>> http://people.apache.org/~shv/hadoop-0.22.0-rc0/
>>> The candidate incorporates more than 700 fixed jiras counting from the
>>> release of 0.21.0.
>>> The branch was cut on November 17 last year. During this year the
>>> branch was tested by different groups in the Hadoop community.
>>> Recently it has been extensively tested on a mid-size cluster.
>>> It contains important improvements, optimizations and bug fixes for
>>> HDFS and MapReduce compared to 0.21.0. Some features introduced in the
>>> latest offspring releases of hadoop-security are not yet ported to
>>> this branch, which is mostly related to security and MapReduce
>>> improvements. Compared to 0.23.0 this release will not contain
>>> Federation or Yarn.
>>> The hadoop-0.22.0 release build is fully automated thanks to the
>>> BigTop team. rc0 artifacts are available and reproducible on Hadoop
>>> Jenkins. The validity of rc0 has been also verified with BigTop.
>>> I think this could be a usable release and an important step forward
>>> in the Hadoop roadmap.
>>> Many people contributed to hadoop-0.22. Thank you everybody who
>>> developed code, built, tested, found and fixed bugs or supported this
>>> effort by any other means.
>>> Please try it out and vote.
>>> Thanks,
>>> --Konstantin

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