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Date: Wed, 30 Apr 2014 15:31:29 -0700
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 <CALte62z4OgyMfYLazFcGHGetgc1dN9n4TKtMHYXY1TDdQu09DQ@mail.gmail.com>
Subject: Re: JDK6 in 1.0
From: Ted Yu <yuzhihong@gmail.com>
To: "dev@hbase.apache.org" <dev@hbase.apache.org>
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bq. we stop building against JDK6 in jenkins

For QA run, JDK6 is used.
>From https://builds.apache.org/job/PreCommit-HBASE-Build/9436/console :

/usr/bin/java
java version "1.6.0_20"


FYI


On Wed, Apr 30, 2014 at 2:52 PM, Enis S=C3=B6ztutar <enis.soz@gmail.com> wr=
ote:

> On Wed, Apr 30, 2014 at 9:34 PM, Andrew Purtell <apurtell@apache.org>
> wrote:
>
> > What does support for JDK 6 mean in the community context here?
> >
>
> For me, dropping support explicitly means that we stop building against
> JDK6 in jenkins, and won't try to fix issues if they are jdk6 only. Relea=
se
> testing
> and unit tests are done on jdk7.
>
>
> >
> > The Hadoop discussion (eventually) settled on when they might adopt API=
s
> > only available in JDK 7 or later. We have no such proposals on the tabl=
e
> > here, right? I see this mentioned in option #1 but is there any 7+ API =
we
> > care about? Otherwise that discussion is premature.
> >
>
> There are only a handful of new APIs, which we can live without. I think
> the issue is about whether we will reject a patch
> or not if it contains JDK7 APIs. G1 is there, but we probably do not want
> to default to that for now.
>
>
> >
> > Unless we pick up new 7+ APIs then it's a question of what runtimes we
> are
> > running builds against or testing with. I plan to do this with 7 and 8
> just
> > as a personal preference. Keeping the lights on for JDK 6 on Jenkins
> seems
> > perfectly fine to do if we have volunteers to fix the issues found ther=
e.
> > That begs the question what happens when that build starts failing.
> Simply
> > filing JIRAs pointing out test failures is noise, those are junk issues
> > without failure analysis and patches. I suspect someone will do
> occasional
> > searches for such issues and close as Invalid or Cannot Reproduce. Anyo=
ne
> > here interested in committing to fix failing JDK 6 builds?
> >
>
> We can decide to keep the JDK6 but deprecate. To me, that means that the
> code should still compile
> and jenkins will run unit tests against it, but usual testing for release
> and precommit builds etc
> are done with jdk7. JDK6 is supported on a volunteer basis as you suggest=
.
>
>
> >
> >
> > On Wed, Apr 30, 2014 at 1:43 PM, Enis S=C3=B6ztutar <enis@apache.org> w=
rote:
> >
> > > Hi,
> > >
> > > Just wanted to kick off a discussion around whether or not we would
> > > explicitly drop support for JDK6 in 1.0, and hence all 1.x releases.
> > >
> > > There has been some discussion on hadoop common-dev[1] about this wit=
h
> no
> > > conclusion so far. The general consensus was that hadoop might drop
> jdk6
> > > support in 3.0, but keep it for 2.x releases (which makes sense for
> > them).
> > >
> > > I would like us to come to a decision for 1.0, and document this in
> > either
> > > outcome so that all 1.x releases can be validated against that
> decision.
> > >
> > > 1) Drop JDK6 support in 1.0 series:
> > >  - In this case, we will switch all jenkins builds of trunk (precommi=
t
> as
> > > well) to jdk7. 0.98- builds might keep jdk6 and jdk7 builds.
> > >  - Trunk code can use JDK7 APIs.
> > >
> > > 2) NOT drop JDK6 support in 1.0
> > >  - Keep a jenkins build running on jdk6 with trunk running unit tests=
.
> > >  - Decide whether we can drop support in 2.x.
> > >
> > >
> > > In either case we document this in book (A JDK version x HBase versio=
n
> > > release matrix)
> > >
> > >
> > > [1]
> > >
> > >
> >
> https://mail-archives.apache.org/mod_mbox/hadoop-common-dev/201404.mbox/%=
3CCABbyifM02nMVaRpARPqnSeJ8gb5x9WTTy8c18tAfr6Z4tQLy2g@mail.gmail.com%3E
> > >
> > > Enis
> > >
> >
> >
> >
> > --
> > Best regards,
> >
> >    - Andy
> >
> > Problems worthy of attack prove their worth by hitting back. - Piet Hei=
n
> > (via Tom White)
> >
>

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