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From Todd Lipcon <t...@cloudera.com>
Subject Re: [VOTE] Release hadoop-2.0.0-alpha
Date Sun, 13 May 2012 05:05:28 GMT
Looking at the release tag vs the current state of branch-2, I have
two concerns from the point of view of HDFS:

1) We reverted HDFS-3157 in branch-2 because it sends deletions for
corrupt replicas without properly going through the "corrupt block"
path. We saw this cause data loss in TestPipelinesFailover. So, I'm
nervous about putting it in a release, even labeled as alpha.

2) HADOOP-8285 and HADOOP-8366 changed the wire format for the RPC
envelope in branch-2, but didn't make it into this rc. So, that would
mean that future alphas would not be protocol-compatible with this
alpha. Per a discussion a few weeks ago, I think we all were in
agreement that, if possible, we'd like all 2.x to be compatible for
client-server communication, at least (even if we don't support
cross-version for the intra-cluster protocols)

Do other folks think it's worth rolling an rc1? I would propose either:
a) Revert HDFS-3157 and commit HADOOP-8285 and HADOOP-8366 on
branch-2.0.0-alpha, so these are the only changes since rc0. Roll a
new rc1 from here.
b) Discard the current branch-2.0.0-alpha and re-branch from the
current state of branch-2.


On Fri, May 11, 2012 at 7:19 PM, Eli Collins <eli@cloudera.com> wrote:
> +1  I installed the build on a 6 node cluster and kicked the tires,
> didn't find any blocking issues.
> Btw in the future better to build from the svn repo so the revision is
> an svn rev from the release branch. Eg 1336254 instead of 40e90d3c7
> which is from the git mirror, this way we're consistent across
> releases.
> hadoop-2.0.0-alpha $ ./bin/hadoop version
> Hadoop 2.0.0-alpha
> Subversion git://devadm900.cc1.ygridcore.net/grid/0/dev/acm/hadoop-trunk/hadoop-common-project/hadoop-common
> -r 40e90d3c7e5d71aedcdc2d9cc55d078e78944c55
> Compiled by hortonmu on Wed May  9 16:19:55 UTC 2012
> From source with checksum 3d9a13a31ef3a9ab4b5cba1f982ab888
> On Wed, May 9, 2012 at 9:58 AM, Arun C Murthy <acm@hortonworks.com> wrote:
>> I've created a release candidate for hadoop-2.0.0-alpha that I would like to release.
>> It is available at: http://people.apache.org/~acmurthy/hadoop-2.0.0-alpha-rc0/
>> The maven artifacts are available via repository.apache.org.
>> Please try the release and vote; the vote will run for the usual 7 days.
>> This is a big milestone for the Apache Hadoop community - congratulations and thanks
for all the contributions!
>> thanks,
>> Arun
>> --
>> Arun C. Murthy
>> Hortonworks Inc.
>> http://hortonworks.com/

Todd Lipcon
Software Engineer, Cloudera

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