Hi, All. What about providing a official benchmark result between `Apache Spark on JDK7` and `Apache Spark on JDK8`? I think that is enough for this issue since we cannot drive users. We had better let users choose one of JDK7/JDK8 for their own benefits.
Bests, Dongjoon. On Sat, Jul 23, 2016 at 4:35 PM, Koert Kuipers <ko...@tresata.com> wrote: > They don't require dropping it sooner rather than later. But signalling in > some way that java 8 is (strongly) recommend would be good. > > On Jul 23, 2016 6:59 PM, "Mark Hamstra" <m...@clearstorydata.com> wrote: > >> Sure, signalling well ahead of time is good, as is getting better >> performance from Java 8; but do either of those interests really require >> dropping Java 7 support sooner rather than later? >> >> Now, to retroactively copy edit myself, when I previously wrote "after >> all or nearly all relevant clusters are actually no longer running on Java >> 6", I meant "...no longer running on Java 7". We should be at a point now >> where there aren't many Java 6 clusters left, but my sense is that there >> are still quite a number of Java 7 clusters around, and that there will be >> for a good while still. >> >> On Sat, Jul 23, 2016 at 3:50 PM, Koert Kuipers <ko...@tresata.com> wrote: >> >>> i care about signalling it in advance mostly. and given the performance >>> differences we do have some interest in pushing towards java 8 >>> >>> On Jul 23, 2016 6:10 PM, "Mark Hamstra" <m...@clearstorydata.com> wrote: >>> >>> Why the push to remove Java 7 support as soon as possible (which is how >>> I read your "cluster admins plan to migrate by date X, so Spark should end >>> Java 7 support then, too")? First, I don't think we should be removing >>> Java 7 support until some time after all or nearly all relevant clusters >>> are actually no longer running on Java 6, and that targeting removal of >>> support at our best guess about when admins are just *planning* to migrate >>> isn't a very good idea. Second, I don't see the significant difficulty or >>> harm in continuing to support Java 7 for a while longer. >>> >>> On Sat, Jul 23, 2016 at 2:54 PM, Koert Kuipers <ko...@tresata.com> >>> wrote: >>> >>>> dropping java 7 support was considered for spark 2.0.x but we decided >>>> against it. >>>> >>>> ideally dropping support for a java version should be communicated far >>>> in advance to facilitate the transition. >>>> >>>> is this the right time to make that decision and start communicating it >>>> (mailing list, jira, etc.)? perhaps for spark 2.1.x or spark 2.2.x? >>>> >>>> my general sense is that most cluster admins have plans to migrate to >>>> java 8 before end of year. so that could line up nicely with spark 2.2 >>>> >>>> >>> >>> >>
