Hello All,

A few reflections:

- I don't think that backporting fixes from a JDK 11 only version to a JDK
8 compatible version would be necessarily a harder thing than any regular
backport. It kind of depends on us (whether we use many JDK 11 only
features or not until we drop JDK 8 from all supported versions). Also if
it gets more painful, then we can decide to limit the number of backported
commits (e.g. only strictly to security fixes / CVEs)
- But even if the above point is true (?), I would not do this cut (e.g.
moving entirely to JDK 11 only) in a minor release. I think this should be
a major change in 4.0. (maybe together with other more "risky" changes,
like the separation of the client and server artifacts/code; or some
incompatible changes in the leader election protocol. Although these are
separate discussions)
- So all-in-all I like the JDK 11 only option the most. But I wouldn't do
it in 3.7 (which might happen very soon), but rather in 4.0. The question
for me is wether to do any in-between step in 3.x. (like the options 1 or 2
above in Christopher's mail). I think it mainly should depend on the timing
of 4.0.

Kind regards,
Mate

On Thu, Oct 22, 2020 at 3:05 PM Flavio Junqueira <f...@apache.org> wrote:

> There are three points that stand out for me in this thread:
>
> - How do we determine how such a change affects our user base?
> - How much effort do the different options induce with respect to
> maintenance?
> - What's the right timeline for changes and how do we communicate them so
> that our users have enough time to prepare?
>
> Someone mentioned a PMC vote, and I don't think this should be a closed
> vote, independent of how the conversation goes.
>
> -Flavio
>
> > On 22 Oct 2020, at 08:39, Alessandro Luccaroni - Diennea
> <alessandro.luccar...@diennea.com.INVALID> wrote:
> >
> > Hi all,
> > If I might chime in as a zookeeper user (in multiple products) and a
> follower of the project I think the drop of Java8 support (official and/or
> unofficial) could be a big mistake.
> >
> > From my own company point of view we already support Java11 in all our
> applications so we are not directly impacted (and we have upgrade path for
> older versions to provide to our customers).
> > My worries resides in the (high) probability of a userbase
> fragmentation: in the recent past Zookeeper development picked up speed
> thanks to a bunch of new committers and PMCs after a period of mostly
> maintenance focused works, but the number of active committers and PMCs is
> still very low for a project like this.
> >
> > I foresee the risk of spreading thin the resources of the project if we
> force the userbase to stick to an older version and, in turn, we are forced
> to backport many issue to the 3.6 branch.
> >
> > Alessandro Luccaroni
> > Platform Manager @ Diennea - MagNews
> > Tel.: (+39) 0546 066100 Int. 924 - Mob.: (+39) 393 7273519
> > Viale G.Marconi 30/14 - 48018 Faenza (RA) - Italy
> >
> > -----Messaggio originale-----
> > Da: Christopher <ctubb...@apache.org>
> > Inviato: giovedì 22 ottobre 2020 05:21
> > A: dev@zookeeper.apache.org
> > Oggetto: Re: [DISCUSS][PROPOSAL] Require JDK 11 to build for 3.7
> >
> > I'm happy that this discussion has been so lively! I just want to
> emphasize a few things:
> >
> > I really do understand the desire to continue to support Java 8... I get
> it. But all the conversations around this seem based on what people are
> doing *today*. But, ZK 3.7 is *tomorrow's* version... a
> > *future* release... so it should be based more on reasonable
> expectations for users in the future, and less based on what is happening
> today. I suspect *most* people today are still using 3.4 anyway (it was
> just so stable for so long...), but that shouldn't mean the developers
> should hold back development on 3.5 and 3.6, any more than today's users of
> 3.5/3.6 should hold back 3.7.
> >
> > Some of the opinions expressed in this discussion seem to propose a
> scenario where users are going to be updating to "bleeding edge"
> > versions of ZooKeeper, but are going to insist on using Java 8.
> > Personally, I find this to be implausible. In my experience, people
> either upgrade everything as soon as they are able to, or they upgrade each
> thing individually, only when they are forced to. The first group will be
> happy to move to Java 11 and ZK 3.7. The second group will probably avoid
> 3.7 anyway, and are fine sticking with 3.6, but if they had to update to
> 3.7, they'd also be fine updating to Java 11 if they had to in order to use
> 3.7. I can't imagine the scenario where people are eagerly choosing to
> upgrade to ZK 3.7, but miserly insisting on using Java 8. Perhaps that
> scenario exists, but it's hard for me to imagine. Even so, my proposal
> would still support even that group of people.
> >
> > I think there are now effectively three proposals being discussed in
> this thread:
> >
> > 1. (Christopher's original proposal) passively support Java 8 at runtime
> by making JDK 11 the minimum requirement to build and test.
> > This scenario involves continuing to fix bugs, as they are discovered
> and reported, that affect JDK 8, but passively, rather than proactively.
> This proposal does *not* drop Java 8 support, but merely de-emphasizes it
> in development of what will be 3.7 in the future, and drops the requirement
> to do dedicated testing with Java 8. I think this is low risk, because it
> is very unlikely that the ZK devs would introduce a bug that would affect
> only Java 8 and the compiler wouldn't catch it... because the
> cross-compilation features of newer JDKs are really good.
> >
> > 2. (Enrico's alternate proposal) this variation of my proposal would
> involve continuing to proactively support Java 8 by creating a dedicated
> testing suite to test client code on Java 8. I think this is a good option,
> but since it involves a significantly higher amount of work than option 1,
> I think the cost-benefit analysis would show this to be not worth the
> effort. Also, if it were implemented, it would need to be done carefully to
> avoid requiring developers to have concurrently installed both Java 8 and
> Java 11 in order to perform a build, because requiring Java 8 at build time
> while developing would be worse than we have today.
> >
> > 3. (Andor's preference) move to JDK 11 fully. This would provide no
> support, passive or active, for Java 8 in ZK 3.7. To be honest, this is my
> personal favorite, and is the simplest to implement and communicate clearly
> to end users in release notes. The only reason I proposed a passive support
> of Java 8 instead of this is because I was trying to seek a compromise from
> the start. But, I think by far, this is the best option for the next
> *future* release of ZK. If you wanted to make the change even more visible
> to users, the version could even be bumped to 4.0.
> >
> > If this were to come to a VOTE by the PMC, in order to make a final
> decision, I would recommend they vote on option 3, and then if that fails,
> vote on option 1, and if that fails, keep things the way they are (because
> option 2 is more work).
> >
> > Christopher
> >
> > P.S. as for Hadoop on Java 11... I've been running Hadoop 3 on JDK 11
> and it works just fine there (as long as you add the missing runtime jar
> for javax.activation:javax.activation-api:1.2.0 to its class path, but that
> was fixed in Hadoop 3.3).
> >
> > On Wed, Oct 21, 2020 at 5:42 PM Tamas Penzes <tam...@cloudera.com.invalid>
> wrote:
> >>
> >> Hi All,
> >>
> >> I've just talked with a Hadoop/HDFS developer who told me what I
> guessed.
> >> With Hadoop3 they have just dropped JDK7 support, dropping JDK8 would
> >> mean a release of Hadoop4.
> >> Since HADOOP-15338 is finished, they test with JDK8 and JDK11 both. As
> >> of today most of the Hadoop users are still on Hadoop2, he doesn't
> >> expect
> >> Hadoop4 soon.
> >> As many Apache components depend on Hadoop and ZooKeeper they won't
> >> hurry to JDK11 until they have to (they will probably go one-by-one
> >> very slowly), which means if Hadoop stays on JDK8, they would use the
> >> last ZK version which works on JDK8.
> >> Do we want a ZK 3.4 again?
> >>
> >> Regards, Tamaas
> >>
> >>
> >> On Wed, Oct 21, 2020 at 11:23 PM Tamas Penzes <tam...@cloudera.com>
> wrote:
> >>
> >>> Hi All,
> >>>
> >>> Just to add my two cents.
> >>>
> >>> Upgrading to JDK11 looks inevitable sooner or later and I would
> >>> definitely not wait until 2030 or 2026 when the extended support of
> JDK8 ends.
> >>> But on the other side I have to agree with Enrico and Patrick that
> >>> far too many users are tied to JDK8 yet (not because they want to
> >>> use JDK8, but because they have to), some of them are components of
> >>> the Hadoop ecosystem, which would be a loss to tie them to 3.6.x for
> years.
> >>> Do we know the state of Hadoop? It builds with JDK8 at the moment,
> >>> but do we know what are their plans to go to JDK11?
> >>> When they move, we should move too, but I don't think it would be
> >>> wise to do it earlier.
> >>>
> >>> Christopher's option looks like the golden path, but it needs some
> >>> investment on the testing side as Enrico pointed it out.
> >>> Could we agree on it as a compromise?
> >>>
> >>> Regards, Tamaas
> >>>
> >>> On Wed, Oct 21, 2020 at 7:11 PM Brent <brentwritesc...@gmail.com>
> wrote:
> >>>
> >>>> I think I was reacting to Enrico's earlier comment of:
> >>>>
> >>>> " ZooKeeper client is used by tons of users and unfortunately many
> >>>> projects are still on JDK8, if we move ZooKeeper to JDK11 the risk
> >>>> is to block users from the adoption, that is that we will see the
> >>>> world to stay on 3.6.x and we will have again a long lived release
> >>>> line, like 3.4."
> >>>>
> >>>> It's a matter of whether or not a long-lived release line is
> >>>> desirable/undesirable.  If everyone is OK keeping 3.6.x up-to-date
> >>>> security/patch-wise (if not feature-wise) for the next N years,
> >>>> then that's a potentially valid approach.  I interpreted that
> >>>> comment as "a long-lived release line is undesirable", but no one
> >>>> explicitly said that, I just read it that way.
> >>>>
> >>>> ~Brent
> >>>>
> >>>> On Wed, Oct 21, 2020 at 9:49 AM Patrick Hunt <ph...@apache.org>
> wrote:
> >>>>
> >>>>> On Wed, Oct 21, 2020 at 9:03 AM Andor Molnar <an...@apache.org>
> wrote:
> >>>>>
> >>>>>> As far as I know Hbase, Solr and Kafka are already Java 11 ready.
> >>>>>>
> >>>>>> IMHO contributors of those projects should also put efforts
> >>>>>> into
> >>>> moving
> >>>>>> forward.
> >>>>>>
> >>>>>> We’re not saying that you _have_ to move to Java 11.
> >>>>>> Staying on Java 8? No problem, 3.6 is for you.
> >>>>>> Want the fancy new features of 3.7? Work on it on your side too.
> >>>>>>
> >>>>>>
> >>>>> ppl want things like security fixes. I believe the highlighted
> >>>>> downside
> >>>> is
> >>>>> that we would need to continue to maintain 3.6.x rather than
> >>>>> allowing users, and ourselves, to focus on trunk for production -"64
> percent"
> >>>> would
> >>>>> be blocked.
> >>>>>
> >>>>> Patrick
> >>>>>
> >>>>>
> >>>>>> Andor
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>> On 2020. Oct 21., at 17:52, Enrico Olivelli
> >>>>>>> <eolive...@gmail.com>
> >>>>> wrote:
> >>>>>>>
> >>>>>>> Il giorno mer 21 ott 2020 alle ore 17:49 Andor Molnar <
> >>>>> an...@apache.org>
> >>>>>> ha
> >>>>>>> scritto:
> >>>>>>>
> >>>>>>>> Correct me if I'm wrong, but Oracle gets paid for extended
> support.
> >>>>>>>> Java 8 support until 2030 is not free of charge.
> >>>>>>>>
> >>>>>>>> "ZK may end up with a lot of users potentially locking
> >>>>>>>> themselves
> >>>> to
> >>>>>>>> 3.6.x for a while as Enrico mentioned."
> >>>>>>>>
> >>>>>>>> That's true. What's the downside of that which we should
> >>>>>>>> invest in
> >>>> to
> >>>>>>>> avoid?
> >>>>>>>>
> >>>>>>>
> >>>>>>> I see ZooKeeper used in many many projects, all of the
> >>>>>>> HBase/Pulsar/Kafka/Solr ecosystem...
> >>>>>>> they will have to move to JDK11 in order to move to the new
> >>>>>>> ZK
> >>>> version
> >>>>>>> so probably they will stay on ZK 3.6
> >>>>>>>
> >>>>>>> Probably with Java 17 LTS released the cards will change on
> >>>>>>> the
> >>>> table
> >>>>>>>
> >>>>>>> Enrico
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>
> >>>>>>>> Andor
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> On Wed, 2020-10-21 at 08:03 -0700, Brent wrote:
> >>>>>>>>> As a slightly different consideration, if you look at the
> >>>> Long-Term
> >>>>>>>>> Support
> >>>>>>>>> (LTS) roadmaps for Java, currently Java 8 is set to have
> >>>>>>>>> full
> >>>> support
> >>>>>>>>> until
> >>>>>>>>> 2030 from Oracle and at least 2026 from OpenJDK & Corretto:
> >>>>>>>>>
> >>>>>>>>>
> >>>>> https://www.oracle.com/java/technologies/java-se-support-roadmap.
> >>>>> html
> >>>>>>>>> https://en.wikipedia.org/wiki/Java_version_history
> >>>>>>>>>
> >>>>>>>>> My guess is that a number of companies are still heavily
> >>>>>>>>> invested
> >>>> at
> >>>>>>>>> the
> >>>>>>>>> Java 8 level (I know a few) and with that kind of time
> >>>>>>>>> horizon,
> >>>> they
> >>>>>>>>> have
> >>>>>>>>> no real motivation to upgrade for quite a while.  If the
> >>>>>>>>> recent Python 2 deprecation is anything to go by, they
> >>>>>>>>> won't do it until they have to.
> >>>>>>>>>
> >>>>>>>>> Not saying Java 8 isn't *very* old (2014 release it seems
> >>>>>>>>> like?)
> >>>> and
> >>>>>>>>> I'm
> >>>>>>>>> not invested heavily either way, but this might suggest
> >>>>>>>>> that ZK
> >>>> may
> >>>>>>>>> end up
> >>>>>>>>> with a lot of users potentially locking themselves to 3.6.x
> >>>>>>>>> for a while as Enrico mentioned.
> >>>>>>>>>
> >>>>>>>>> (Not a major contributor, but wanted to chime in since I
> >>>>>>>>> just had this conversation with a bunch of people
> >>>>>>>>> professionally recently)
> >>>>>>>>>
> >>>>>>>>> Brent
> >>>>>>>>>
> >>>>>>>>> On Wed, Oct 21, 2020 at 2:07 AM Andor Molnar
> >>>>>>>>> <an...@apache.org>
> >>>>>>>>> wrote:
> >>>>>>>>>
> >>>>>>>>>> Thanks for the summary.
> >>>>>>>>>>
> >>>>>>>>>> I still vote for option 1). Move 3.7.0 to JDK 11 fully.
> >>>>>>>>>> Other projects will upgrade once they’re JDK11 compliant,
> >>>>>>>>>> otherwise they will
> >>>> stay
> >>>>>>>>>> on 3.5
> >>>>>>>>>> or 3.6. Both version are quite recent in ZooKeeper-terms,
> >>>>>>>>>> we already planned big changes for 3.7.0 and JDK 11 could
> >>>>>>>>>> be one of them.
> >>>>>>>>>>
> >>>>>>>>>> Don’t put extra burden on the ZK community to help others
> >>>>>>>>>> staying on ancient Java versions.
> >>>>>>>>>>
> >>>>>>>>>> Andor
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>> On 2020. Oct 21., at 10:57, Enrico Olivelli <
> >>>> eolive...@gmail.com>
> >>>>>>>>>>> wrote:
> >>>>>>>>>>>
> >>>>>>>>>>> Let me recap
> >>>>>>>>>>> - Christopher is proposing to move to JDK11
> >>>>>>>>>>> - ZooKeeper client and server are bundled and coded and
> >>>>>>>>>>> tested together
> >>>>>>>>>> in
> >>>>>>>>>>> zookeeper-server
> >>>>>>>>>>> - Enrico is concerned about the need of testing ZooKeeper
> >>>>>>>>>>> client on JDK8 (not a problem to move the server to
> >>>>>>>>>>> JDK11)
> >>>>>>>>>>>
> >>>>>>>>>>> ZooKeeper client is used by tons of users and
> >>>>>>>>>>> unfortunately many projects are still on JDK8, if we move
> >>>>>>>>>>> ZooKeeper to JDK11 the risk is to block
> >>>>>>>>>> users
> >>>>>>>>>>> from the adoption,
> >>>>>>>>>>> that is that we will see the world to stay on 3.6.x and
> >>>>>>>>>>> we will have
> >>>>>>>>>> again
> >>>>>>>>>>> a long lived release line, like 3.4.
> >>>>>>>>>>>
> >>>>>>>>>>> Testing the client on JDK8 would be possible if we create
> >>>>>>>>>>> some kind of additional module with system tests, then we
> >>>>>>>>>>> can start the
> >>>> server
> >>>>>>>>>>> on
> >>>>>>>>>> docker
> >>>>>>>>>>> on JDK11+ and start a client on JDK8 with Maven toolchain
> >>>>>>>>>>> it should possible to run surefire tests using a separate
> >>>>>>>>>>> JVM.
> >>>>>>>>>>>
> >>>>>>>>>>> So in my vision 2 options:
> >>>>>>>>>>> 1) fully JDK11 - drop JDK8 at all
> >>>>>>>>>>> 2) build with JDK11 - server only on JDK11 - add system
> >>>>>>>>>>> tests with docker and toolchains that ensure the
> >>>>>>>>>>> ZooKeeper client (and all
> >>>>>>>>>>> dependencies)
> >>>>>>>>>>> still work on JDK8
> >>>>>>>>>>>
> >>>>>>>>>>> From my point of view about the ZooKeeper ecosystem
> >>>>>>>>>>> option 2) will be far better, but we need resources to
> >>>>>>>>>>> work on a new test suite.
> >>>>>>>>>>>
> >>>>>>>>>>> Enrico
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>> Il giorno mer 21 ott 2020 alle ore 10:43 Andor Molnar <
> >>>>>>>>>>> an...@apache.org>
> >>>>>>>>>> ha
> >>>>>>>>>>> scritto:
> >>>>>>>>>>>
> >>>>>>>>>>>> Tamas, Enrico,
> >>>>>>>>>>>>
> >>>>>>>>>>>> Sorry I don’t follow. Why do we have to test the client
> >>>>>>>>>>>> with JDK 8 in version 3.7.0?
> >>>>>>>>>>>>
> >>>>>>>>>>>> Andor
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>>> On 2020. Oct 20., at 22:29, Tamas Penzes <
> >>>>>>>>>>>>> tam...@cloudera.com.INVALID>
> >>>>>>>>>>>> wrote:
> >>>>>>>>>>>>> Hi Enrico,
> >>>>>>>>>>>>>
> >>>>>>>>>>>>> Separating ZooKeeper client and server is a huge work,
> >>>>>>>>>>>>> but we might not need it.
> >>>>>>>>>>>>> As you mentioned we have to test ZK client with Java 8,
> >>>>>>>>>>>>> what about separating only the test cases which we need
> >>>>>>>>>>>>> to run with
> >>>>>>>>>>>>> Java8 too?
> >>>>>>>>>>>>> In Curator we have the ZK compatibility tests where we
> >>>>>>>>>>>>> run a limited
> >>>>>>>>>>>> amount
> >>>>>>>>>>>>> of Curator's jUnit tests with a different ZK version.
> >>>>>>>>>>>>> We might be able to do the same here, tag tests which
> >>>>>>>>>>>>> are testing ZK
> >>>>>>>>>>>> client
> >>>>>>>>>>>>> and run them separately with Java 8. The only
> >>>>>>>>>>>>> limitation is that these tests must stay JDK8
> >>>>>>>>>>>>> compatible.
> >>>>>>>>>>>>> But from the tags we will see which ones are those.
> >>>>>>>>>>>>>
> >>>>>>>>>>>>> What do you think?
> >>>>>>>>>>>>>
> >>>>>>>>>>>>> Regards, Tamaas
> >>>>>>>>>>>>>
> >>>>>>>>>>>>> On Sat, Oct 17, 2020 at 7:45 AM Enrico Olivelli <
> >>>>>>>>>>>>> eolive...@gmail.com>
> >>>>>>>>>>>> wrote:
> >>>>>>>>>>>>>> Christopher
> >>>>>>>>>>>>>> I appreciate your idea and I also moved lots of my
> >>>>>>>>>>>>>> projects to work
> >>>>>>>>>> the
> >>>>>>>>>>>> way
> >>>>>>>>>>>>>> you are suggesting.
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>>> We must run tests using real jdk8 to test the
> >>>>>>>>>>>>>> Zookeeper client. We
> >>>>>>>>>> must
> >>>>>>>>>>>>>> ensure that Zookeeper works well, especially while
> >>>>>>>>>>>>>> dealing with
> >>>>>>>>>> security
> >>>>>>>>>>>>>> stuff.
> >>>>>>>>>>>>>> Currently the client is in the same module of the
> >>>>>>>>>>>>>> server and it will
> >>>>>>>>>>>> take a
> >>>>>>>>>>>>>> good (huge) amount of work to separate them
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>>> Enrico
> >>>>>>>>>>>>>>
> >>>>>>>>>>>>>> Il Ven 16 Ott 2020, 23:25 Christopher
> >>>>>>>>>>>>>> <ctubb...@apache.org> ha
> >>>>>>>>>> scritto:
> >>>>>>>>>>>>>>> Hi ZK Devs,
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> With recent advancements in Java (since Java 9), it
> >>>>>>>>>>>>>>> is now generally no longer necessary to require that
> >>>>>>>>>>>>>>> software be developed on an older JDK in order to
> >>>>>>>>>>>>>>> have confidence that it will run on the older version
> >>>>>>>>>>>>>>> of Java. This is because, as of Java 9, all JDK
> >>>>>>>>>>>>>>> releases have better support for cross-compilation to
> >>>>>>>>>>>>>>> older Java versions.
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> What this means is that developers can confidently
> >>>>>>>>>>>>>>> make the build requirements for a project higher than
> >>>>>>>>>>>>>>> the Java version that will actually be supported at
> >>>>>>>>>>>>>>> runtime.
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> In fact, ZooKeeper already supports the necessary
> >>>>>>>>>>>>>>> flags in its Maven build configuration to ensure that
> >>>>>>>>>>>>>>> it uses JDK 8 compliance when building on a newer JDK
> >>>>>>>>>>>>>>> (I added this way back in
> >>>>>>>>>>>>>>> ZOOKEEPER-3739 /
> >>>>>>>>>>>>>>> https://github.com/apache/zookeeper/pull/1269)
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> So, I propose that we make JDK 11 the new minimum
> >>>>>>>>>>>>>>> version to *build* ZooKeeper with. This would not
> >>>>>>>>>>>>>>> change the runtime requirement, which would remain at
> >>>>>>>>>>>>>>> JDK 8.
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> The only necessary change to make this happen would
> >>>>>>>>>>>>>>> be to add the minimum Java version to the
> >>>>>>>>>>>>>>> maven-enforcer-plugin (like
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>
> >>>> https://github.com/apache/accumulo/blob/438f0efd34ef9d200bc8c7ecdd1
> >>>> 1d5dedb146519/pom.xml#L1162-L1164
> >>>>>>>>>>>>>>> )
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> This would allow ZooKeeper to to streamline its
> >>>>>>>>>>>>>>> development process a little bit by reducing the
> >>>>>>>>>>>>>>> amount of CI testing that is done as part of the
> >>>>>>>>>>>>>>> build. In other words, we can drop the CI builds for
> >>>>>>>>>>>>>>> JDK 8, which saves on build resources and time. The
> >>>>>>>>>>>>>>> return on investment is so low for the JDK 8 builds
> >>>>>>>>>>>>>>> anyway, because of the improved cross-compilation in
> >>>>>>>>>>>>>>> newer JDKs. So, there's not much value in building on
> >>>>>>>>>>>>>>> JDK 8 anyway.
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> Of course, I am only recommending this for *new*
> >>>>>>>>>>>>>>> release lines, starting with ZooKeeper 3.7.0/master
> >>>>>>>>>>>>>>> branch, because I would not want to change
> >>>>>>>>>>>>>>> expectations for users who will build their own
> >>>>>>>>>>>>>>> 3.5 and 3.6
> >>>>>>>>>>>>>>> versions as they continue to have patch versions
> >>>>>>>>>>>>>>> released.
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> What do you think?
> >>>>>>>>>>>>>>>
> >>>>>>>>>>>>>>> Kind Regards,
> >>>>>>>>>>>>>>> Christopher
> >>>>>>>>>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>
> >>>>>>
> >>>>>
> >>>>
> >>>
> >
> > ________________________________
> >
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