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To: Ted Yu , Robert Metzger , "dev@flink.apache.org" Cc: user Content-Type: multipart/alternative; boundary="001a1142870edf9dab055420f8b9" archived-at: Wed, 12 Jul 2017 16:13:57 -0000 --001a1142870edf9dab055420f8b9 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable +1 for dropping 1.7 from me as well. Gyula On Wed, Jul 12, 2017, 17:53 Ted Yu wrote: > +1 on dropping support for Java 1.7 > > -------- Original message -------- > From: Robert Metzger > Date: 7/12/17 8:36 AM (GMT-08:00) > To: dev@flink.apache.org > Cc: user > 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 > 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 > > >> anymore, and Flink should not lack behind :-) >> >> Cheers, Fokko >> >> 2017-07-12 15:56 GMT+02:00 Stephan Ewen : >> >> > Bumping this thread again. >> > >> > There are several strong points for dropping Java 7 support, apart fro= m >> 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 require= d >> > 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 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 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=E2=80=99t seen anything in F= LINK-5005 >> > which >> > > > prevents simply adding Scala 2.12 to our supported build matrix an= d >> > > > continuing to build 2.10 / 2.11 against Java 1.7. >> > > > >> > > > Greg >> > > > >> > > > >> > > > > On Jun 8, 2017, at 11:39 AM, Robert Metzger >> > > 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=3D15274018&page=3Dcom.atlassian.jira. >> > > plugin.system.issuetabpanels:comment-tabpanel#comment-15274018 >> > > > < >> > > > https://issues.apache.org/jira/browse/FLINK-3211? >> > > focusedCommentId=3D15274018&page=3Dcom.atlassian.jira. >> > > plugin.system.issuetabpanels:comment-tabpanel#comment-15274018 >> > > > > >> > > > > >> > > > > >> > > > > On Thu, Mar 23, 2017 at 2:42 PM, Theodore Vasiloudis < >> > > > theodoros.vasiloudis@gmail.com > theodoros.vasiloudis@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 < >> > rmetzger@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 > > > > > wrote: >> > > > > Robert, >> > > > > >> > > > > Thanks for the report. Shouldn=E2=80=99t we be revisiting this d= ecision 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 o= r >> > pull >> > > > requests have been written for Java 8. >> > > > > >> > > > > Greg >> > > > > >> > > > > >> > > > > >> > > > >> On Mar 23, 2017, at 6:37 AM, Robert Metzger > > > > > 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.li@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 backwa= rd >> > > > compatibility and notify everyone 2) maintain and patch current, >> > old-tech >> > > > compatible version at a reasonably limited scope. Building backwar= d >> > > > compatibility is too much for an open sourced project >> > > > >> >> > > > >> >> > > > >> >> > > > >> On Wed, Mar 15, 2017 at 7:10 AM, Robert Metzger < >> > rmetzger@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.neumann@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 Jav= a >> 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 > >> >> > > > >> > Sent: Wednesday, March 15, 2017 12:30:24 PM >> > > > >> > To: user@flink.apache.org ; >> > > > 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 feeli= ng >> > 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 >> > > > >> > >> > > > >> > >> > > > >> > >> > > > >> > >> > > > >> > >> > > > >> >> > > > >> >> > > > > >> > > > > >> > > > > >> > > > > >> > > > >> > > > >> > > >> > >> > > --001a1142870edf9dab055420f8b9 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

+1 for dropping 1.7 from me as well.

Gyula


On Wed, Jul 12, 2017, 17:53= Ted Yu <yuzhihong@gmail.com&= gt; wrote:
+1 on dropping supp= ort for Java 1.7

-------- Original message --------
From: Robert M= etzger <rmetzge= r@apache.org>
Date: 7/12/17 8:36 AM (GMT-08:00)
<= div>To: dev@flink= .apache.org
Subject: R= e: [POLL] Who still uses Java 7 with Flink ?

+1 to drop Java 7 support

I believe that w= e can move to Java 8 for the argument you've stated.
ElasticSearch = 5, Spark 2.2 =C2=A0require Java 8 already, Hadoop 3.0.0 will require it as = well.

On Wed, Jul 12, 2017 at 4:02 PM, Driesprong, Fokko = <fokko@driespr= ong.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 <sewen@apache.org>:

> Bumping this thread again.
>
> There are several strong points for dropping Java 7 support, apart fro= m the
> fact that it is not maintained
>
>=C2=A0 =C2=A0- We could really use the Java 8 default methods feature i= n interfaces to
> evolve the API without breaking backwards compatibility
>
>=C2=A0 =C2=A0- Easier build setup for Scala 2.12 (which requires Java 8= ), no need to
> manage the tricky combinations of Java / Scala versions
>
>=C2=A0 =C2=A0- Ability to use vanilla Akka (rather than Flakka) which r= equires Java 8.
>=C2=A0 =C2=A0 =C2=A0- Fewer problems for users that use Akka in the Fli= nk applications
>=C2=A0 =C2=A0 =C2=A0- Flakka currently does not support Scala 2.12
>=C2=A0 =C2=A0 =C2=A0- Newer Akka versions shade protobuf, which is impo= rtant
>
> I think these together make a pretty good case for bumping the require= d
> Java version to Java 8.
>
> It would just help both Flink users (dependency management, Scala vers= ions)
> 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 <ricetons@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 <code@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=E2=80=99t seen anythin= g in FLINK-5005
> which
> > > prevents simply adding Scala 2.12 to our supported build mat= rix and
> > > continuing to build 2.10 / 2.11 against Java 1.7.
> > >
> > > Greg
> > >
> > >
> > > > On Jun 8, 2017, at 11:39 AM, Robert Metzger <rmetzger@apache.org&g= t;
> > wrote:
> > > >
> > > > Hi all,
> > > >
> > > > as promised in March, I want to revive this discussion!=
> > > >
> > > > Our users are begging for Scala 2.12 support [1], migra= tion 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&= #39;s new language
> > > features all speak for dropping Java 7.
> > > >
> > > > Java 8 has been released in March, 2014. Java 7 is unsu= pported since
> > > June 2016.
> > > >
> > > > So what's the feeling in the community regarding th= e step?
> > > >
> > > >
> > > > [1] https://issues.apache.org/j= ira/browse/FLINK-5005# <
> > > https://issues.apache.org/jira/brows= e/FLINK-5005#>
> > > > [2] https://issues.apache.org/ji= ra/browse/FLINK-5989 <
> > > https://issues.apache.org/jira/browse= /FLINK-5989>
> > > > [3]
> > > https://issues.apache.org/jira/browse= /FLINK-3211?
> > focusedCommentId=3D15274018&page=3Dcom.atlassian.jira.
> > plugin.system.issuetabpanels:comment-tabpanel#comment-15274018 > > > <
> > > https://issues.apache.org/jira/browse= /FLINK-3211?
> > focusedCommentId=3D15274018&page=3Dcom.atlassian.jira.
> > plugin.system.issuetabpanels:comment-tabpanel#comment-15274018 > > > >
> > > >
> > > >
> > > > On Thu, Mar 23, 2017 at 2:42 PM, Theodore Vasiloudis &l= t;
> > > theodoros.vasiloudis@gmail.com <mailto:theodoros.vasiloudis@gmail.c= om
> >>
> > > wrote:
> > > > Hello all,
> > > >
> > > > I'm sure you've considered this already, but wh= at this data does not
> > > include is all the potential future users,
> > > > i.e. slower moving organizations (banks etc.) which cou= ld 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 < > rmetzger@apac= he.org
> > > <mailto:rmetzger@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 <code@greghogan.com > > > <mailto:code@greghogan.com>> wrote:
> > > > Robert,
> > > >
> > > > Thanks for the report. Shouldn=E2=80=99t we be revisiti= ng 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 <rmetzger@apache.org
> > > <mailto:rmetzger@apache.org>> wrote:
> > > >>
> > > >> Looks like 9% on twitter and 24% on the mailing lis= t 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.li@offerupnow= .com
> > > <mailto:bowen.li@offerupnow.com>> wrote:
> > > >> There's always a tradeoff we need to make. I= 9;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 so= ftware upgrading
> major
> > > things like this is 1) upgrade for next big release without = backward
> > > compatibility and notify everyone 2) maintain and patch curr= ent,
> old-tech
> > > compatible version at a reasonably limited scope. Building b= ackward
> > > compatibility is too much for an open sourced project
> > > >>
> > > >>
> > > >>
> > > >> On Wed, Mar 15, 2017 at 7:10 AM, Robert Metzger <= ;
> rmetzger@apac= he.org
> > > <mailto:rmetzger@apache.org>> wrote:
> > > >> I've put it also on our Twitter account:
> > > >> https://twitter.com= /ApacheFlink/status/842015062667755521 <
> > > https://twitter.com/ApacheFl= ink/status/842015062667755521>
> > > >>
> > > >> On Wed, Mar 15, 2017 at 2:19 PM, Martin Neumann <= ;
> martin.neuma= nn@ri.se
> > > <mailto:martin.neumann@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 update= d to Java 7 2 years
> > > ago. I
> > > >> > doubt we can ditch Java 7 support any time soo= n if we want to make
> > it
> > > easy
> > > >> > for companies to use Flink.
> > > >> >
> > > >> > cheers Martin
> > > >> >
> > > >> > //PS sorry if this gets sent twice, we just mi= grated to a new mail
> > > system
> > > >> > and a lot of things are broken
> > > >> >
> > > >> > ________________________________
> > > >> > From: Stephan Ewen <sewen@apache.org <mailto:sewen@apache.org>>
> > > >> > Sent: Wednesday, March 15, 2017 12:30:24 PM > > > >> > To: user@flink.apache.org <mailto:user@flink.apache.org>;
> > > de= v@flink.apache.org <mailto:dev@flink.apache.org>
> > > >> > Subject: [POLL] Who still uses Java 7 with Fli= nk ?
> > > >> >
> > > >> > 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 J= ava 7 still is.
> > > >> >
> > > >> > Thanks,
> > > >> > Stephan
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >>
> > > >>
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
>

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