+1 on dropping support for Java 1.7 -------- Original message --------From: Robert Metzger <rmetz...@apache.org> Date: 7/12/17 8:36 AM (GMT-08:00) To: d...@flink.apache.org Cc: user <user@flink.apache.org> Subject: Re: [POLL] Who still uses Java 7 with Flink ? +1 to drop Java 7 support I believe that we can move to Java 8 for the argument you've stated.ElasticSearch 5, Spark 2.2 require Java 8 already, Hadoop 3.0.0 will require it as well. On Wed, Jul 12, 2017 at 4:02 PM, Driesprong, Fokko <fo...@driesprong.frl> wrote: Hi,
I would be in favor of dropping Java 7 as we don't use it in our hadoop infra (and we are a bank). Also, Spark 2.2 has been released today, which doesn't support Java 7 <http://spark.apache.org/releases/spark-release-2-2-0.html> anymore, and Flink should not lack behind :-) Cheers, Fokko 2017-07-12 15:56 GMT+02:00 Stephan Ewen <se...@apache.org>: > Bumping this thread again. > > There are several strong points for dropping Java 7 support, apart from the > fact that it is not maintained > > - We could really use the Java 8 default methods feature in interfaces to > evolve the API without breaking backwards compatibility > > - Easier build setup for Scala 2.12 (which requires Java 8), no need to > manage the tricky combinations of Java / Scala versions > > - Ability to use vanilla Akka (rather than Flakka) which requires Java 8. > - Fewer problems for users that use Akka in the Flink applications > - Flakka currently does not support Scala 2.12 > - Newer Akka versions shade protobuf, which is important > > I think these together make a pretty good case for bumping the required > Java version to Java 8. > > It would just help both Flink users (dependency management, Scala versions) > and developers (build simplification) a lot. > Unless we see users stepping forward and making a case that it will be > impossible for them to upgrade to Java 8, I suggest to go forward with > this. > > Best, > Stephan > > > > On Thu, Jun 8, 2017 at 9:36 PM, Haohui Mai <ricet...@gmail.com> wrote: > > > +1 > > > > There are several high impacts security vulnerabilities in JDK 7 and will > > not be addressed. > > > > As a result we completely moved away from JDK 7. > > > > +1 on separating the tasks of supporting Scala 2.12 and JDK 8 in two > steps. > > > > > > On Thu, Jun 8, 2017 at 9:53 AM Greg Hogan <c...@greghogan.com> wrote: > > > > > Is this not two different issues? > > > - adding builds for Scala 2.12 > > > - upgrading to Java version 1.8 > > > > > > It may be time to switch, but I haven’t seen anything in FLINK-5005 > which > > > prevents simply adding Scala 2.12 to our supported build matrix and > > > continuing to build 2.10 / 2.11 against Java 1.7. > > > > > > Greg > > > > > > > > > > On Jun 8, 2017, at 11:39 AM, Robert Metzger <rmetz...@apache.org> > > wrote: > > > > > > > > Hi all, > > > > > > > > as promised in March, I want to revive this discussion! > > > > > > > > Our users are begging for Scala 2.12 support [1], migration to Akka > 2.4 > > > would solve a bunch of shading / dependency issues (Akka 2.4 will > remove > > > Akka's protobuf dependency [2][3]) and generally Java 8's new language > > > features all speak for dropping Java 7. > > > > > > > > Java 8 has been released in March, 2014. Java 7 is unsupported since > > > June 2016. > > > > > > > > So what's the feeling in the community regarding the step? > > > > > > > > > > > > [1] https://issues.apache.org/jira/browse/FLINK-5005# < > > > https://issues.apache.org/jira/browse/FLINK-5005#> > > > > [2] https://issues.apache.org/jira/browse/FLINK-5989 < > > > https://issues.apache.org/jira/browse/FLINK-5989> > > > > [3] > > > https://issues.apache.org/jira/browse/FLINK-3211? > > focusedCommentId=15274018&page=com.atlassian.jira. > > plugin.system.issuetabpanels:comment-tabpanel#comment-15274018 > > > < > > > https://issues.apache.org/jira/browse/FLINK-3211? > > focusedCommentId=15274018&page=com.atlassian.jira. > > plugin.system.issuetabpanels:comment-tabpanel#comment-15274018 > > > > > > > > > > > > > > > > On Thu, Mar 23, 2017 at 2:42 PM, Theodore Vasiloudis < > > > theodoros.vasilou...@gmail.com <mailto:theodoros.vasilou...@gmail.com > >> > > > wrote: > > > > Hello all, > > > > > > > > I'm sure you've considered this already, but what this data does not > > > include is all the potential future users, > > > > i.e. slower moving organizations (banks etc.) which could be on Java > 7 > > > still. > > > > > > > > Whether those are relevant is up for debate. > > > > > > > > Cheers, > > > > Theo > > > > > > > > On Thu, Mar 23, 2017 at 12:14 PM, Robert Metzger < > rmetz...@apache.org > > > <mailto:rmetz...@apache.org>> wrote: > > > > Yeah, you are right :) > > > > I'll put something in my calendar for end of May. > > > > > > > > On Thu, Mar 23, 2017 at 12:12 PM, Greg Hogan <c...@greghogan.com > > > <mailto:c...@greghogan.com>> wrote: > > > > Robert, > > > > > > > > Thanks for the report. Shouldn’t we be revisiting this decision at > the > > > beginning of the new release cycle rather than near the end? There is > > > currently little cost to staying with Java 7 since no Flink code or > pull > > > requests have been written for Java 8. > > > > > > > > Greg > > > > > > > > > > > > > > > >> On Mar 23, 2017, at 6:37 AM, Robert Metzger <rmetz...@apache.org > > > <mailto:rmetz...@apache.org>> wrote: > > > >> > > > >> Looks like 9% on twitter and 24% on the mailing list are still using > > > Java 7. > > > >> > > > >> I would vote to keep supporting Java 7 for Flink 1.3 and then > revisit > > > once we are approaching 1.4 in September. > > > >> > > > >> On Thu, Mar 16, 2017 at 8:00 AM, Bowen Li <bowen...@offerupnow.com > > > <mailto:bowen...@offerupnow.com>> wrote: > > > >> There's always a tradeoff we need to make. I'm in favor of upgrading > > to > > > Java 8 to bring in all new Java features. > > > >> > > > >> The common way I've seen (and I agree) other software upgrading > major > > > things like this is 1) upgrade for next big release without backward > > > compatibility and notify everyone 2) maintain and patch current, > old-tech > > > compatible version at a reasonably limited scope. Building backward > > > compatibility is too much for an open sourced project > > > >> > > > >> > > > >> > > > >> On Wed, Mar 15, 2017 at 7:10 AM, Robert Metzger < > rmetz...@apache.org > > > <mailto:rmetz...@apache.org>> wrote: > > > >> I've put it also on our Twitter account: > > > >> https://twitter.com/ApacheFlink/status/842015062667755521 < > > > https://twitter.com/ApacheFlink/status/842015062667755521> > > > >> > > > >> On Wed, Mar 15, 2017 at 2:19 PM, Martin Neumann < > martin.neum...@ri.se > > > <mailto:martin.neum...@ri.se>> > > > >> wrote: > > > >> > > > >> > I think this easier done in a straw poll than in an email > > > conversation. > > > >> > I created one at: http://www.strawpoll.me/12535073 < > > > http://www.strawpoll.me/12535073> > > > >> > (Note that you have multiple choices.) > > > >> > > > > >> > > > > >> > Though I prefer Java 8 most of the time I have to work on Java 7. > A > > > lot of > > > >> > the infrastructure I work on still runs Java 7, one of the > > companies I > > > >> > build a prototype for a while back just updated to Java 7 2 years > > > ago. I > > > >> > doubt we can ditch Java 7 support any time soon if we want to make > > it > > > easy > > > >> > for companies to use Flink. > > > >> > > > > >> > cheers Martin > > > >> > > > > >> > //PS sorry if this gets sent twice, we just migrated to a new mail > > > system > > > >> > and a lot of things are broken > > > >> > > > > >> > ________________________________ > > > >> > From: Stephan Ewen <se...@apache.org <mailto:se...@apache.org>> > > > >> > Sent: Wednesday, March 15, 2017 12:30:24 PM > > > >> > To: user@flink.apache.org <mailto:user@flink.apache.org>; > > > d...@flink.apache.org <mailto:d...@flink.apache.org> > > > >> > Subject: [POLL] Who still uses Java 7 with Flink ? > > > >> > > > > >> > Hi all! > > > >> > > > > >> > I would like to get a feeling how much Java 7 is still being used > > > among > > > >> > Flink users. > > > >> > > > > >> > At some point, it would be great to drop Java 7 support and make > use > > > of > > > >> > Java 8's new features, but first we would need to get a feeling > how > > > much > > > >> > Java 7 is still used. > > > >> > > > > >> > Would be happy if users on Java 7 respond here, or even users that > > > have > > > >> > some insights into how widespread they think Java 7 still is. > > > >> > > > > >> > Thanks, > > > >> > Stephan > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > >> > > > > > > > > > > > > > > > > > > > > > > > > >
