I want to make some changes to the lifecycle of a yarn service (in a backwards compatible way).
https://issues.apache.org/jira/browse/YARN-117 1. formal state machine model with stop state idempotent and entry-able from any state 2. waiting/blocked state a service can enter when waiting for something else 3. an alternate base class that does the state model checks before executing any state change functions -currently its done at end-of-operation in the super() calls. 4. gradual move of services to the stricter base class. With a new base class nothing will break (as the move can be done case-by-case, leaving the heavily subclassed ones alone); the state model extensions & formalisation would be visible but not used. I don't want to hold anything up, because I need more testing of things before this is ready for review. I just want to get the fixes in before it ships On 19 November 2012 16:22, Robert Evans <ev...@yahoo-inc.com> wrote: > I am OK with removing the alpha assuming that we think that the APIs are > stable enough that we are willing to truly start maintaining backwards > compatibility on them within 2.X. From what I have seen I think that they > are fairly stable and I think there is enough adoption by other projects > right now that breaking backwards compatibility would be problematic. > > --Bobby Evans > > On 11/16/12 11:34 PM, "Stack" <st...@duboce.net> wrote: > > >On Fri, Nov 16, 2012 at 3:38 PM, Aaron T. Myers <a...@cloudera.com> wrote: > >> Hi Arun, > >> > >> Given that the 2.0.3 release is intended to reflect the growing > >>stability > >> of YARN, and the QJM work will be included in 2.0.3 which provides a > >> complete HDFS HA solution, I think it's time we consider removing the > >> "-alpha" label from the release version. My preference would be to > >>remove > >> the label entirely, but we could also perhaps call it "-beta" or > >>something. > >> > >> Thoughts? > >> > > > >I think it fine after two minor releases undoing the '-alpha' suffix. > > > >If folks insist we next go to '-beta', I'd hope we'd travel all > >remaining 22 letters of the greek alphabet before we 2.0.x. > > > >St.Ack > >
