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From Junping Du <...@hortonworks.com>
Subject Release plan for Apache Hadoop 2.6.3
Date Wed, 02 Dec 2015 17:05:48 GMT
Hi all,
   Based on the feedback from previous email threads and JIRAs, we are in good time for releasing

Things Done/TODO:

  + Branch
    -- Based on branch-2.6, which has been open to 2.6.3 commits for a while, I already branch
out branch-2.6.3 today.
    -- New commits coming as fix to 2.6.3 need to explicitly cherry-pick to branch-2.6.3 as
well as branch-2.6.

  + Patches
    -- 2.6.3 already has 31 fixes as list of [1] shows.
    -- The list of open tickets [2] on 2.6.3 is relative small (3 for now) as we already move
non-blocker / non-critical ones out to 2.6.4. I'll keep triaging and see what we can get in
within a week or so.

  + Release
    -- Given the open ticket list is relative short and all of them are patch available, I
plan to start RC process for voting early next week with leaving aside some buffer time.


Appreciate any help in moving forward open tickets [2].​



[1] 2.6.3 Fixed Tickets:

[2] 2.6.3 Tickets:

From: Junping Du
Sent: Tuesday, December 01, 2015 12:26 PM
To: Vinod Kumar Vavilapalli
Cc: Sangjin Lee; mapreduce-dev@hadoop.apache.org; yarn-dev@hadoop.apache.org; Hadoop Common;
hdfs-dev@hadoop.apache.org; Haohui Mai; Chris Trezzo; junping_du@apache.org
Subject: Re: continuing releases on Apache Hadoop 2.6.x

Thanks Vinod!

I went through all 31 fixes (Common: 8, HDFS: 6, MAPREDUCE: 8, YARN: 9) landed on branch-2.6​
now, and all outstanding patches (>=5KB) are listed below and they are all bug fix.

Haven't found any high risky patches so far but I noticed we have 3 significant fixes (MAPREDUCE-5948,
MAPREDUCE-6481 and MAPREDUCE-6549) for LineRecordReader.  Among them, MAPREDUCE-5948 and MAPREDUCE-6481
are completed fixes and we will ship them in 2.7.2, so I think there is no risk with them.
MAPREDUCE-6549, together with an open JIRA: MAPREDUCE-6558, sounds like fix the same issue
for uncompressed/compressed input file. I already ping the JIRA owners to get suggestions
on if we could release MAPREDUCE-6549 independently or together with MAPREDUCE-6558 in next

I already pinged all owners for open JIRAs that targeted for 2.6.3 to move it to 2.6.4. Based
on the feedback from JIRAs (and voices here too), I will create branch-2.6.3 in next 1 day
or 2. Thanks!​

List of Outstanding Patches:

    HADOOP-10134 [JDK8] Fix Javadoc errors caused by incorrect or illegal tags in doc comments.
(apurtell via stevel) 38K

    HDFS-9289. Make DataStreamer#block thread safe and verify genStamp in commitBlock. (Chang
Li via zhz) 12K
    HDFS-9470. Encryption zone on root not loaded from fsimage after NN restart. (Xiao Chen
via wang) 5K

    MAPREDUCE-6273. HistoryFileManager should check whether summaryFile exists to avoid FileNotFoundException
causing HistoryFileInfo into MOVE_FAILED state. (zhihai xu via devaraj) 5K
    MAPREDUCE-5948. org.apache.hadoop.mapred.LineRecordReader does not handle multibyte record
delimiters well (Vinayakumar B, Rushabh Shah, and Akira AJISAKA via jlowe) 20K
    MAPREDUCE-6481. LineRecordReader may give incomplete record and wrong position/key information
for uncompressed input sometimes. (Zhihai Xu via jlowe) 19K
    MAPREDUCE-6549. multibyte delimiters with LineRecordReader cause duplicate records (wilfreds
via rkanter) 31K

    YARN-2859. ApplicationHistoryServer binds to default port 8188 in MiniYARNCluster.(Vinod
Kumar Vavilapalli via xgong) 6K (with addendum)
    YARN-4344. NMs reconnecting with changed capabilities can lead to wrong cluster resource
calculations (Varun Vasudev via jlowe) 12K
    YARN-3925. ContainerLogsUtils#getContainerLogFile fails to read container log files from
full disks. (zhihai xu via jlowe) 7K



From: Vinod Kumar Vavilapalli <vinodkv@apache.org>
Sent: Monday, November 30, 2015 9:23 PM
To: Junping Du
Cc: Sangjin Lee; mapreduce-dev@hadoop.apache.org; yarn-dev@hadoop.apache.org; Hadoop Common;
hdfs-dev@hadoop.apache.org; Haohui Mai; Chris Trezzo
Subject: Re: continuing releases on Apache Hadoop 2.6.x

+1, this sounds good to me.


On Nov 25, 2015, at 11:44 AM, Junping Du <jdu@hortonworks.com<mailto:jdu@hortonworks.com>>

May be we should quickly go through landed patches in 2.6.3 list and postpone any risky patches
to 2.6.4?

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