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From Vinod Kumar Vavilapalli <vino...@hortonworks.com>
Subject Re: Planning Hadoop 2.6.1 release
Date Thu, 16 Jul 2015 01:24:18 GMT
Alright, I’d like to make progress while the issue is hot.

I created a label to discuss on the candidate list of patches: https://issues.apache.org/jira/issues/?jql=labels%20%3D%202.6.1-candidate<https://issues.apache.org/jira/issues/?jql=labels%20=%202.6.1-candidate>

Next steps, I’ll do the following
 - Review 2.7 and 2.8 blocker/critical tickets and see what makes sense for 2.6.1 and add
as candidates
 - I haven’t reviewed the current list yet, the seed list is from this email thread. Will
review them.
 - I also have a bunch of patches that I’d like to include, will update them right away.

Others, please look at the current list and let me know what else you’d like to include.

I’d like to keep this ‘candidate-collection’ cycle’ for a max of a week and then start
the release process. @Akira, let’s sync up offline on how to take this forward in terms
of the release process.


On Jul 15, 2015, at 1:12 PM, Vinod Kumar Vavilapalli <vinodkv@hortonworks.com<mailto:vinodkv@hortonworks.com>>

Got pinged on a recent thread on this one.

As I mentioned there, I had many offline discussions re 2.6.1.

The biggest problem I found offline was about what bug-fixes are acceptable and what aren’t
for everyone wishing to consume 2.6.1. Given the number of bug-fixes that went into 2.7.x
and into branch-2.8, figuring out a set of patches that is acceptable for everyone is a huge
challenge which kind of stalled my attempts.


On Jul 1, 2015, at 12:41 PM, Sean Busbey <busbey@cloudera.com<mailto:busbey@cloudera.com>>

Any update on a release plan for 2.6.1?

On Wed, Jun 10, 2015 at 1:25 AM, Brahma Reddy Battula <
brahmareddy.battula@huawei.com<mailto:brahmareddy.battula@huawei.com>> wrote:

HI vinod

any update on this..? are we planning to give 2.6.1 Or can we make 2.7.1
as stable give..?

Thanks & Regards
Brahma Reddy Battula

From: Zhihai Xu [zxu@cloudera.com<mailto:zxu@cloudera.com>]
Sent: Wednesday, May 13, 2015 12:04 PM
To: mapreduce-dev@hadoop.apache.org<mailto:mapreduce-dev@hadoop.apache.org>
Cc: common-dev@hadoop.apache.org<mailto:common-dev@hadoop.apache.org>; yarn-dev@hadoop.apache.org<mailto:yarn-dev@hadoop.apache.org>;
Subject: Re: Planning Hadoop 2.6.1 release

Hi Akira,

Can we also include YARN-3242? YARN-3242 fixed a critical ZKRMStateStore
It will work better with YARN-2992.


On Tue, May 12, 2015 at 10:38 PM, Akira AJISAKA <

Thanks all for collecting jiras for 2.6.1 release. In addition, I'd like
to include the following:

* HADOOP-11343. Overflow is not properly handled in calculating final iv
* YARN-2874. Dead lock in "DelegationTokenRenewer" which blocks RM to
execute any further apps
* YARN-2992. ZKRMStateStore crashes due to session expiry
* YARN-3013. AMRMClientImpl does not update AMRM token properly
* YARN-3369. Missing NullPointer check in AppSchedulingInfo causes RM to
* MAPREDUCE-6303. Read timeout when retrying a fetch error can be fatal
a reducer

All of these are marked as blocker bug for 2.7.0 but not fixed in 2.6.0.


On 5/4/15 11:15, Brahma Reddy Battula wrote:

Hello Vinod,

I am thinking,can we include HADOOP-11491 also..? wihout this jira harfs
will not be usable when cluster installed in HA mode and try to get
filecontext like below..

Path path = new

FileSystem fs = path.getFileSystem(new Configuration());
path = fs.makeQualified(path);
FileContext fc = FileContext.getFileContext(path.toUri(),new

Thanks & Regards
Brahma Reddy Battula
From: Chris Nauroth [cnauroth@hortonworks.com]
Sent: Friday, May 01, 2015 4:32 AM
To: mapreduce-dev@hadoop.apache.org; common-dev@hadoop.apache.org;
yarn-dev@hadoop.apache.org; hdfs-dev@hadoop.apache.org
Subject: Re: Planning Hadoop 2.6.1 release

Thank you, Arpit.  In addition, I suggest we include the following:

HADOOP-11333. Fix deadlock in DomainSocketWatcher when the notification
pipe is full
HADOOP-11604. Prevent ConcurrentModificationException while closing
sockets during shutdown of DomainSocketWatcher thread.
HADOOP-11648. Set DomainSocketWatcher thread name explicitly
HADOOP-11802. DomainSocketWatcher thread terminates sometimes after
is an I/O error during requestShortCircuitShm

HADOOP-11604 and 11648 are not critical by themselves, but they are
pre-requisites to getting a clean cherry-pick of 11802, which we believe
finally fixes the root cause of this issue.

--Chris Nauroth

On 4/30/15, 3:55 PM, "Arpit Agarwal" <aagarwal@hortonworks.com> wrote:

HDFS candidates for back-porting to Hadoop 2.6.1. The first two were
requested in [1].

HADOOP-11674. oneByteBuf in CryptoInputStream and CryptoOutputStream
should be non static
HADOOP-11710. Make CryptoOutputStream behave like DFSOutputStream wrt

HDFS-7009. Active NN and standby NN have different live nodes.
HDFS-7035. Make adding a new data directory to the DataNode an atomic
improve error handling
HDFS-7425. NameNode block deletion logging uses incorrect appender.
HDFS-7443. Datanode upgrade to BLOCKID_BASED_LAYOUT fails if duplicate
block files are present in the same volume.
HDFS-7489. Incorrect locking in FsVolumeList#checkDirs can hang
HDFS-7503. Namenode restart after large deletions can cause slow
HDFS-7575. Upgrade should generate a unique storage ID for each volume.
HDFS-7579. Improve log reporting during block report rpc failure.
HDFS-7587. Edit log corruption can happen if append fails with a quota
HDFS-7596. NameNode should prune dead storages from storageMap.
HDFS-7611. deleteSnapshot and delete of a file can leave orphaned
in the blocksMap on NameNode restart.
HDFS-7714. Simultaneous restart of HA NameNodes and DataNode can cause
DataNode to register successfully with only one NameNode.
HDFS-7733. NFS: readdir/readdirplus return null directory attribute on
HDFS-7831. Fix the starting index and end condition of the loop in
HDFS-7885. Datanode should not trust the generation stamp provided by
HDFS-7960. The full block report should prune zombie storages even if
they're not empty.
HDFS-8072. Reserved RBW space is not released if client terminates
writing block.
HDFS-8127. NameNode Failover during HA upgrade can cause DataNode to
finalize upgrade.


[1] Will Hadoop 2.6.1 be released soon?

On 4/27/15, 11:47 AM, "Vinod Kumar Vavilapalli" <vinodkv@apache.org>

There were several requests on the user lists [1] for a 2.6.1
release. I
got many offline comments too.

Planning to do a 2.6.1 release in a few weeks time. We already have a
of tickets committed to 2.7.1. I created a filter [2] to tracking

We need to collectively come up with a list of critical issues. We can
the JIRA Target Version field for the same. I see some but not a whole
of new work for this release, most of it is likely going to be pulling
critical patches from 2.7.1/2.8 etc.



[1] Will Hadoop 2.6.1 be released soon?
[2] 2.6.1 pending tickets


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