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From Junping Du <...@hortonworks.com>
Subject Re: Apache Hadoop 2.8.3 Release Plan
Date Tue, 21 Nov 2017 09:08:52 GMT
Thanks Kai for calling out this feature/improvement for attention and Andrew for comments.


While I agree that maintenance release should focus on important bug fix only, I doubt we
have strict rules to disallow any features/improvements to land on maint release especially
when those are small footprint or low impact on existing code/features. In practice, we indeed
has 77 new features/improvements in latest 2.7.3 and 2.7.4 release.


Back to HADOOP-14964, I did a quick check and it looks like case here belongs to self-contained
improvement that has very low impact on existing code base, so I am OK with the improvement
get landed on branch-2.8 in case it is well reviewed and tested.


However, as RM of branch-2.8, I have two concerns to accept it in our 2.8.3 release:

1. Timing - as I mentioned in beginning, the main purpose of 2.8.3 are for several critical
bug fixes and we should target to release it very soon - my current plan is to cut RC out
within this week inline with waiting for 3.0.0 vote closing. Can this improvement be well
tested against branch-2.8.3 within this strictly timeline? It seems a bit rush unless we have
strong commitment on test plan and activities in such a tight time.


2. Upgrading - I haven't heard we settle down the plan of releasing this feature in 2.9.1
release - though I saw some discussions are going on at HADOOP-14964. Assume 2.8.3 is released
ahead of 2.9.1 and it includes this improvement, then users consuming this feature/improvement
have no 2.9 release to upgrade or forcefully upgrade with regression. We may need a better
upgrade story here.


Pls let me know what you think. Thanks!



Thanks,


Junping


________________________________
From: Andrew Wang <andrew.wang@cloudera.com>
Sent: Monday, November 20, 2017 10:22 PM
To: Zheng, Kai
Cc: Junping Du; common-dev@hadoop.apache.org; hdfs-dev@hadoop.apache.org; mapreduce-dev@hadoop.apache.org;
yarn-dev@hadoop.apache.org
Subject: Re: Apache Hadoop 2.8.3 Release Plan

I'm against including new features in maintenance releases, since they're meant to be bug-fix
only.

If we're struggling with being able to deliver new features in a safe and timely fashion,
let's try to address that, not overload the meaning of "maintenance release".

Best,
Andrew

On Mon, Nov 20, 2017 at 5:20 PM, Zheng, Kai <kai.zheng@intel.com<mailto:kai.zheng@intel.com>>
wrote:
Hi Junping,

Thank you for making 2.8.2 happen and now planning the 2.8.3 release.

I have an ask, is it convenient to include the back port work for OSS connector module? We
have some Hadoop users that wish to have it by default for convenience, though in the past
they used it by back porting themselves. I have raised this and got thoughts from Chris and
Steve. Looks like this is more wanted for 2.9 but I wanted to ask again here for broad feedback
and thoughts by this chance. The back port patch is available for 2.8 and the one for branch-2
was already in. IMO, 2.8.x is promising as we can see some shift from 2.7.x, hence it's worth
more important features and efforts. How would you think? Thanks!

https://issues.apache.org/jira/browse/HADOOP-14964

Regards,
Kai

-----Original Message-----
From: Junping Du [mailto:jdu@hortonworks.com<mailto:jdu@hortonworks.com>]
Sent: Tuesday, November 14, 2017 9:02 AM
To: common-dev@hadoop.apache.org<mailto:common-dev@hadoop.apache.org>; hdfs-dev@hadoop.apache.org<mailto:hdfs-dev@hadoop.apache.org>;
mapreduce-dev@hadoop.apache.org<mailto:mapreduce-dev@hadoop.apache.org>; yarn-dev@hadoop.apache.org<mailto:yarn-dev@hadoop.apache.org>
Subject: Apache Hadoop 2.8.3 Release Plan

Hi,
    We have several important fixes get landed on branch-2.8 and I would like to cut off branch-2.8.3
now to start 2.8.3 release work.
    So far, I don't see any pending blockers on 2.8.3, so my current plan is to cut off 1st
RC of 2.8.3 in next several days:
         -  For all coming commits to land on branch-2.8, please mark the fix version as 2.8.4.
         -  If there is a really important fix for 2.8.3 and getting closed, please notify
me ahead before landing it on branch-2.8.3.
    Please let me know if you have any thoughts or comments on the plan.

Thanks,

Junping
________________________________________
From: dujunping@gmail.com<mailto:dujunping@gmail.com> <dujunping@gmail.com<mailto:dujunping@gmail.com>>
on behalf of ??? <junping_du@apache.org<mailto:junping_du@apache.org>>
Sent: Friday, October 27, 2017 3:33 PM
To: general@hadoop.apache.org<mailto:general@hadoop.apache.org>
Subject: [ANNOUNCE] Apache Hadoop 2.8.2 Release.

Hi all,

    It gives me great pleasure to announce that the Apache Hadoop community has voted to release
Apache Hadoop 2.8.2, which is now available for download from Apache mirrors[1]. For download
instructions please refer to the Apache Hadoop Release page [2].

Apache Hadoop 2.8.2 is the first GA release of Apache Hadoop 2.8 line and our newest stable
release for entire Apache Hadoop project. For major changes incuded in Hadoop 2.8 line, please
refer Hadoop 2.8.2 main page[3].

This release has 315 resolved issues since previous 2.8.1 release with following
breakdown:
   - 91 in Hadoop Common
   - 99 in HDFS
   - 105 in YARN
   - 20 in MapReduce
Please read the log of CHANGES[4] and RELEASENOTES[5] for more details.

The release news is posted on the Hadoop website too, you can go to the downloads section
directly [6].

Thank you all for contributing to the Apache Hadoop release!


Cheers,

Junping


[1] http://www.apache.org/dyn/closer.cgi/hadoop/common

[2] http://hadoop.apache.org/releases.html

[3] http://hadoop.apache.org/docs/r2.8.2/index.html

[4]
http://hadoop.apache.org/docs/r2.8.2/hadoop-project-dist/hadoop-common/release/2.8.2/CHANGES.2.8.2.html

[5]
http://hadoop.apache.org/docs/r2.8.2/hadoop-project-dist/hadoop-common/release/2.8.2/RELEASENOTES.2.8.2.html

[6] http://hadoop.apache.org/releases.html#Download


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