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

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Re: Merging the HA branch to trunk - Wednesday, February 29th
Nice, this is huge! +1

On Feb 23, 2012, at 7:54 AM, Aaron T. Myers 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

Arun C. Murthy
Hortonworks Inc.