+1 for dropping Java 7.
> Am 12.07.2017 um 17:36 schrieb Robert Metzger <rmetz...@apache.org>:
>
> +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
> <mailto: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
> <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
> <mailto: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
> > <mailto: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
> > > <mailto: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
> > > > > <mailto: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#> <
> > > > 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> <
> > > > 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
> > > > <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
> > > > <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>
> > > > <mailto: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>
> > > > <mailto: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>
> > > > <mailto: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>
> > > > <mailto: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>
> > > > <mailto: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>
> > > > <mailto: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> <
> > > > 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>
> > > > <mailto: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> <
> > > > 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>
> > > > >> > <mailto: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>
> > > > >> > <mailto:user@flink.apache.org <mailto:user@flink.apache.org>>;
> > > > d...@flink.apache.org <mailto:d...@flink.apache.org>
> > > > <mailto: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
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >> >
> > > > >>
> > > > >>
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> >
>
