Hi Junping, thanks for the mail, inline: On Sat, Feb 20, 2016 at 7:34 AM, Junping Du <j...@hortonworks.com> wrote:
> Shall we consolidate effort for 2.8.0 and 3.0.0? It doesn't sounds > reasonable to have two alpha releases to go in parallel. Is EC feature the > main motivation of releasing hadoop 3 here? If so, I don't understand why > this feature cannot land on 2.8.x or 2.9.x as an alpha feature. > EC is one motivation, there are others too (JDK8, shell scripts, jar bumps). I'm open to EC going into branch-2, but I haven't seen any backporting yet and it's a lot of code. > If we release 3.0 in a month like plan proposed below, it means we will > have 4 active releases going in parallel - two alpha releases (2.8 and 3.0) > and two stable releases (2.6.x and 2.7.x). It brings a lot of challenges in > issues tracking and patch committing, not even mention the tremendous > effort of release verification and voting. > I would like to propose to wait 2.8 release become stable (may be 2nd > release in 2.8 branch cause first release is alpha due to discussion in > another email thread), then we can move to 3.0 as the only alpha release. > In the meantime, we can bring more significant features (like ATS v2, etc.) > to trunk and consolidate stable releases in 2.6.x and 2.7.x. I believe that > make life easier. :) > Thoughts? > > Based on some earlier mails in this chain, I was planning to release off trunk. This way we avoid having to commit to yet-another-branch, and makes tracking easier since trunk will always be a superset of the branch-2's. This does mean though that trunk needs to be stable, and we need to be more judicious with branch merges, and quickly revert broken code. Regarding RM/voting/validation efforts, Steve mentioned some scripts that he uses to automate Slider releases. This is something I'd like to bring over to Hadoop. Ideally, publishing an RC is push-button, and it comes with automated validation. I think this will help with the overhead. Also, since these will be early alphas, and there will be a lot of them, I'm not expecting anyone to do endurance runs on a large cluster before casting a +1. Best, Andrew
