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HDFS, mail # dev - Merging the HA branch to trunk - Wednesday, February 29th


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Aaron T. Myers 2012-02-23, 02:24
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Aaron T. Myers 2012-03-01, 00:00
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Todd Lipcon 2012-03-01, 00:03
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Suresh Srinivas 2012-03-01, 01:42
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Vinod Kumar Vavilapalli 2012-03-01, 03:52
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Tsz Wo Sze 2012-03-01, 22:10
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Aaron T. Myers 2012-03-01, 22:39
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Aaron T. Myers 2012-03-02, 05:01
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Tsz Wo Sze 2012-03-01, 22:24
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Aaron T. Myers 2012-03-01, 22:51
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Tsz Wo Sze 2012-03-01, 00:32
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Todd Lipcon 2012-03-01, 00:36
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Tsz Wo Sze 2012-03-01, 01:01
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Todd Lipcon 2012-03-01, 01:04
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Tsz Wo Sze 2012-03-01, 01:17
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Eli Collins 2012-02-23, 03:37
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Jitendra Pandey 2012-02-23, 06:05
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Arun C Murthy 2012-02-23, 06:12
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Re: Merging the HA branch to trunk - Wednesday, February 29th
Suresh Srinivas 2012-02-23, 18:23
I am not sure any of these issues are serious show stoppers for merging
into trunk.
Why not merge into trunk and fix some of these issues?

The reason is, merging is non trivial with two branches changing
independently. Given that
Jitendra has posted a merge patch, why not do it earlier? Do we need heads
up of a week.
If merging must wait, should we consider creating a merge branch and
committing the patch
Jitendra has. This makes other merges more manageable.

Thoughts?

On Wed, Feb 22, 2012 at 6:24 PM, Aaron T. Myers <[EMAIL PROTECTED]> wrote:

> Hello HDFS devs,
>
> Work has largely stabilized on the HA-branch in the last few weeks. At this
> point the HA NN project is nearly feature-complete for manual failover.
> We've been running the full test suite nightly, and all automated tests
> have been passing, except for one known test failure which should be fixed
> shortly.
>
> I'd like to begin the process of merging this branch back to HDFS trunk.
> There are still several outstanding sub-JIRAs under the HDFS-1623 and
> HADOOP-7454 umbrella JIRAs, but most of these are either nice-to-haves or
> relate to supporting automatic failover. Once the branch is merged to
> trunk, work on these JIRAs can continue there.
>
> I've identified the following JIRAs which I think should be the only
> remaining blockers for merging to trunk:
>
> HDFS-2904 - Client support for getting delegation tokens in an HA cluster
> HDFS-2920 - Fix remaining TODOs in the code from HA. Mostly little cleanup
> stuff.
> HDFS-2958 - Sweep for remaining proxy construction which doesn't go through
> failover path
> HDFS-2979 - Balancer should use logical URI for creating failover proxy
> (will fix the only current test failure)
>
> All of these JIRAs should be fixed in the next few days.
>
> I propose that, unless more blocker issues are discovered in the interim,
> we merge this branch to trunk one week from today, i.e. Wednesday, February
> 29th. During this time we will also execute the test plans described in the
> test documents attached to HDFS-1623 to try to identify any regressions or
> performance issues in the branch. If you plan to review the code changes or
> the test plan, I ask that you please do so as soon as possible.
>
> Feedback is certainly welcome on this plan.
>
> Thanks a lot,
> Aaron
>
> --
> Aaron T. Myers
> Software Engineer, Cloudera
>
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Todd Lipcon 2012-02-23, 18:27
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Todd Lipcon 2012-02-24, 02:08