+1 to Matei's reasoning. On Wed, Mar 30, 2016 at 9:21 AM, Matei Zaharia <matei.zaha...@gmail.com> wrote:
> I agree that putting it in 2.0 doesn't mean keeping Scala 2.10 for the > entire 2.x line. My vote is to keep Scala 2.10 in Spark 2.0, because it's > the default version we built with in 1.x. We want to make the transition > from 1.x to 2.0 as easy as possible. In 2.0, we'll have the default > downloads be for Scala 2.11, so people will more easily move, but we > shouldn't create obstacles that lead to fragmenting the community and > slowing down Spark 2.0's adoption. I've seen companies that stayed on an > old Scala version for multiple years because switching it, or mixing > versions, would affect the company's entire codebase. > > Matei > > On Mar 30, 2016, at 12:08 PM, Koert Kuipers <ko...@tresata.com> wrote: > > oh wow, had no idea it got ripped out > > On Wed, Mar 30, 2016 at 11:50 AM, Mark Hamstra <m...@clearstorydata.com> > wrote: > >> No, with 2.0 Spark really doesn't use Akka: >> https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/SparkConf.scala#L744 >> >> On Wed, Mar 30, 2016 at 9:10 AM, Koert Kuipers <ko...@tresata.com> wrote: >> >>> Spark still runs on akka. So if you want the benefits of the latest akka >>> (not saying we do, was just an example) then you need to drop scala 2.10 >>> On Mar 30, 2016 10:44 AM, "Cody Koeninger" <c...@koeninger.org> wrote: >>> >>>> I agree with Mark in that I don't see how supporting scala 2.10 for >>>> spark 2.0 implies supporting it for all of spark 2.x >>>> >>>> Regarding Koert's comment on akka, I thought all akka dependencies >>>> have been removed from spark after SPARK-7997 and the recent removal >>>> of external/akka >>>> >>>> On Wed, Mar 30, 2016 at 9:36 AM, Mark Hamstra <m...@clearstorydata.com> >>>> wrote: >>>> > Dropping Scala 2.10 support has to happen at some point, so I'm not >>>> > fundamentally opposed to the idea; but I've got questions about how >>>> we go >>>> > about making the change and what degree of negative consequences we >>>> are >>>> > willing to accept. Until now, we have been saying that 2.10 support >>>> will be >>>> > continued in Spark 2.0.0. Switching to 2.11 will be non-trivial for >>>> some >>>> > Spark users, so abruptly dropping 2.10 support is very likely to delay >>>> > migration to Spark 2.0 for those users. >>>> > >>>> > What about continuing 2.10 support in 2.0.x, but repeatedly making an >>>> > obvious announcement in multiple places that such support is >>>> deprecated, >>>> > that we are not committed to maintaining it throughout 2.x, and that >>>> it is, >>>> > in fact, scheduled to be removed in 2.1.0? >>>> > >>>> > On Wed, Mar 30, 2016 at 7:45 AM, Sean Owen <so...@cloudera.com> >>>> wrote: >>>> >> >>>> >> (This should fork as its own thread, though it began during >>>> discussion >>>> >> of whether to continue Java 7 support in Spark 2.x.) >>>> >> >>>> >> Simply: would like to more clearly take the temperature of all >>>> >> interested parties about whether to support Scala 2.10 in the Spark >>>> >> 2.x lifecycle. Some of the arguments appear to be: >>>> >> >>>> >> Pro >>>> >> - Some third party dependencies do not support Scala 2.11+ yet and so >>>> >> would not be usable in a Spark app >>>> >> >>>> >> Con >>>> >> - Lower maintenance overhead -- no separate 2.10 build, >>>> >> cross-building, tests to check, esp considering support of 2.12 will >>>> >> be needed >>>> >> - Can use 2.11+ features freely >>>> >> - 2.10 was EOL in late 2014 and Spark 2.x lifecycle is years to come >>>> >> >>>> >> I would like to not support 2.10 for Spark 2.x, myself. >>>> >> >>>> >> --------------------------------------------------------------------- >>>> >> To unsubscribe, e-mail: dev-unsubscr...@spark.apache.org >>>> >> For additional commands, e-mail: dev-h...@spark.apache.org >>>> >> >>>> > >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: dev-unsubscr...@spark.apache.org >>>> For additional commands, e-mail: dev-h...@spark.apache.org >>>> >>>> >> > >
