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: u...@flink.apache.org <mailto:u...@flink.apache.org>;
> > dev@flink.apache.org <mailto:dev@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
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >>
> > >>
> > >
> > >
> > >
> > >
> >
> >
>
