Is JDK 13 supposed to work now? I was able to get archives if I skipped
tests, but w Java 8 the tests hung, and Java 13 tests had errors.



On Fri, May 1, 2020 at 6:27 PM Andrew Palumbo <andrew_palu...@msn.com>
wrote:

>
> Hey All, been very sick again,  I may be offline for a couple of weeks,
> I am probably not going to be able to commit to times in the next couple of
> weeks,  I'll be back and forth to SD and sleeping alot.  Thank you again,
> Christofer, for the help.  If anyone needs me for anything, please use my
> apalu...@apache.org address, (i am not subscribed to mahout with that) or
> give a shout on slack, so that i dont miss it.
>
> Thanks.
>
> Andy
>
> ---------- Forwarded message ----------
> From: Christofer Dutz <christofer.d...@c-ware.de>
> Date: Apr 24, 2020 2:18 AM
> Subject: Re: Hi ... need some help?
> To: dev@mahout.apache.org
> Cc:
>
>
> Hi all,
>
> just found the email with the time for the call today ... that's 19:00 /
> 7pm here ... perfect.
> Would just need some information on how to join.
>
> Chris
>
>
> Am 20.04.20, 17:31 schrieb "Andrew Musselman" <andrew.mussel...@gmail.com
> >:
>
>     Thanks Chris, will take a look at your PR.
>
>     I think we would be fine upgrading anything that is still making
>     improvements, probably makes sense to discuss Friday on our call if
> you can
>     make it.
>
>     Best
>     Andrew
>
>     On Mon, Apr 20, 2020 at 1:53 AM Christofer Dutz <
> christofer.d...@c-ware.de>
>     wrote:
>
>     > Hi Folks,
>     >
>     > so I've now tested the build with java 1.8, 9, 10 and they work ...
>     > 11 I'm getting errors about unsupported java major versions again ...
>     > guess there's some old library version in there somewhere.
>     >
>     > But at least I managed to get you out of this 1.7 trap.
>     >
>     > Chris
>     >
>     >
>     > Am 20.04.20, 09:46 schrieb "Christofer Dutz" <
> christofer.d...@c-ware.de>:
>     >
>     >     Hi folks,
>     >
>     >     so I was now able to build (including all tests) with Java 8 and
> 9 ...
>     > currently trying 10 ...
>     >
>     >     Are there any objection that some maven dependencies get updated
> to
>     > more recent versions? I mean ... the hbase-client you're using is
> more than
>     > 5 years old ...
>     >
>     >     Chris
>     >
>     >
>     >     Am 20.04.20, 00:29 schrieb "Andrew Musselman" <
>     > andrew.mussel...@gmail.com>:
>     >
>     >         No problem; would 10:00 a.m. Pacific next Friday the 24th
> work for
>     > you time
>     >         zone-wise?
>     >
>     >         On Sun, Apr 19, 2020 at 12:15 PM Christofer Dutz <
>     > christofer.d...@c-ware.de>
>     >         wrote:
>     >
>     >         > Sorry ...
>     >         >
>     >         > didn't see your response ... into Mahout too deep ;-)
>     >         > Guess we have to postpone this to sometime over the week.
>     >         >
>     >         > Chris
>     >         >
>     >         >
>     >         > Am 19.04.20, 19:56 schrieb "Andrew Musselman" <
>     > andrew.mussel...@gmail.com
>     >         > >:
>     >         >
>     >         >     *what time
>     >         >
>     >         >     On Sun, Apr 19, 2020 at 10:51 Andrew Musselman <
>     >         > andrew.mussel...@gmail.com>
>     >         >     wrote:
>     >         >
>     >         >     > I think it's safe to move to 1.8; yeah what tune is
> good
>     > for you?
>     >         > I'm in
>     >         >     > Pacific time zone and am flexible this afternoon.
>     >         >     >
>     >         >     > Trevor you free?
>     >         >     >
>     >         >     > On Sun, Apr 19, 2020 at 09:37 Christofer Dutz <
>     >         > christofer.d...@c-ware.de>
>     >         >     > wrote:
>     >         >     >
>     >         >     >> Yikes! ... well guess then I can't help you folks
> as it's
>     > almost
>     >         >     >> impossible to get my hands on a 1.7 version.
>     >         >     >>
>     >         >     >> What's preventing you from going to 1.8+?
>     >         >     >>
>     >         >     >> Any your build says 1.8 and above:
>     >         >     >>         <requireJavaVersion>
>     >         >     >>                   <version>[1.8,)</version>
>     >         >     >>                 </requireJavaVersion>
>     >         >     >>
>     >         >     >> Regarding the artifacts ... would it be ok to have
> the
>     > maven
>     >         > artifacts
>     >         >     >> using classifiers and perhaps the files in the libs
> and
>     >         > distribution to
>     >         >     >> follow the typical scala sheme?
>     >         >     >>
>     >         >     >> Chris
>     >         >     >>
>     >         >     >> Am 19.04.20, 17:56 schrieb "Trevor Grant" <
>     > trevor.d.gr...@gmail.com
>     >         > >:
>     >         >     >>
>     >         >     >>     Yea, we have a requirement on 1.7. we need to
> get it
>     > up to 8,
>     >         > but
>     >         >     >>     considered that a different issue.
>     >         >     >>
>     >         >     >>     Maven throws warning, sbt breaks down entirely
> (when
>     > importing)-
>     >         >     >> hence why
>     >         >     >>     we were using a script to replace 2.11 w 2.12
>     >         >     >>
>     >         >     >>     On Sun, Apr 19, 2020, 10:33 AM Christofer Dutz <
>     >         >     >> christofer.d...@c-ware.de>
>     >         >     >>     wrote:
>     >         >     >>
>     >         >     >>     > Well I have been compiling with various jdks
> from 8
>     > to 14.
>     >         > However I
>     >         >     >>     > noticed that if I select a jdk and start the
> build
>     > that the
>     >         > Scala
>     >         >     >> parts
>     >         >     >>     > Seefahrt to the version in my systems path.
> Which
>     > then
>     >         > results in
>     >         >     >> all sorts
>     >         >     >>     > of major version problems.
>     >         >     >>     >
>     >         >     >>     > For the Scalatest plugin I managed to have it
> use
>     > the maven
>     >         >     >> java.home...
>     >         >     >>     > The Scala compiler is being a little trickyer.
>     >         >     >>     >
>     >         >     >>     > Will continue this evening. Keep your fingers
>     > crossed.
>     >         >     >>     >
>     >         >     >>     > Also does maven totally not like variables in
>     > artifactids.
>     >         >     >>     >
>     >         >     >>     > Chris
>     >         >     >>     > ________________________________
>     >         >     >>     > Von: Trevor Grant <trevor.d.gr...@gmail.com>
>     >         >     >>     > Gesendet: Sonntag, 19. April 2020 15:41
>     >         >     >>     > An: Mahout Dev List <dev@mahout.apache.org>
>     >         >     >>     > Betreff: Re: Hi ... need some help?
>     >         >     >>     >
>     >         >     >>     > Hey Chris,
>     >         >     >>     >
>     >         >     >>     > First of all- thank you so much for your work
> so
>     > far.
>     >         >     >>     >
>     >         >     >>     > The build 100% currently works, the only
> issue is
>     > with
>     >         > releasing
>     >         >     >> binaries.
>     >         >     >>     > Are you compiling w 1.7? Not really sure why
>     > artifact IDs are
>     >         >     >> changing?
>     >         >     >>     > That's very strange.
>     >         >     >>     >
>     >         >     >>     > To answer your question regarding the
> community
>     > block- no, it
>     >         > is
>     >         >     >> not as if
>     >         >     >>     > there is a company that pays us to work on
> Mahout
>     > and the
>     >         > rest is
>     >         >     >>     > community. What it means is that while we
>     > appreciate those
>     >         > code
>     >         >     >>     > contributions, no one still actively involved
> is
>     > maintaining
>     >         > them
>     >         >     >> and we
>     >         >     >>     > advise people to use at their own risk. The
>     > refactor to a
>     >         >     >> `community`
>     >         >     >>     > folder was meant to reflect the reality of the
>     > situation.
>     >         >     >>     >
>     >         >     >>     > The only test issues I was aware of were with
>     > Javadocs when
>     >         > trying
>     >         >     >> to do a
>     >         >     >>     > release with Java 1.8+ those would fail due to
>     > formatting.
>     >         >     >>     >
>     >         >     >>     > I feel like you're hitting some unique
> issues, and
>     > maybe we
>     >         > could
>     >         >     >> help you
>     >         >     >>     > out / there may exist simple solutions.
>     >         >     >>     >
>     >         >     >>     > Thank you again for your help!
>     >         >     >>     >
>     >         >     >>     > tg
>     >         >     >>     >
>     >         >     >>     >
>     >         >     >>     >
>     >         >     >>     >
>     >         >     >>     > On Sun, Apr 19, 2020 at 2:17 AM Christofer
> Dutz <
>     >         >     >> christofer.d...@c-ware.de
>     >         >     >>     > >
>     >         >     >>     > wrote:
>     >         >     >>     >
>     >         >     >>     > > Hi folks,
>     >         >     >>     > >
>     >         >     >>     > > So yesterday I invested several hours in
> cleaning
>     > up your
>     >         > build.
>     >         >     >> I got
>     >         >     >>     > > quite far, currently trying to get the
> tests to
>     > pass. For
>     >         > some
>     >         >     >>     > > Scala-Java-major-version problems, but
> working on
>     > fixing
>     >         > them.
>     >         >     >>     > >
>     >         >     >>     > > However sind things will be different. I
> hope
>     > that's OK.
>     >         >     >> Especially with
>     >         >     >>     > > the artifact ids.
>     >         >     >>     > >
>     >         >     >>     > > Just as a question: does the build
> currently work
>     > at all?
>     >         >     >> Especially in
>     >         >     >>     > > the community block I had to fix quite a
> few API
>     > changes
>     >         > where
>     >         >     >> the code
>     >         >     >>     > in
>     >         >     >>     > > the blocks were for older versions of
> libraries.
>     >         >     >>     > >
>     >         >     >>     > > I hope I get some more tests to pass today.
>     >         >     >>     > >
>     >         >     >>     > > Chris
>     >         >     >>     > > ________________________________
>     >         >     >>     > > Von: Andrew Musselman <a...@apache.org>
>     >         >     >>     > > Gesendet: Donnerstag, 16. April 2020 20:35
>     >         >     >>     > > An: Mahout Dev List <dev@mahout.apache.org>
>     >         >     >>     > > Betreff: Re: Hi ... need some help?
>     >         >     >>     > >
>     >         >     >>     > > Looking forward to working on this with you;
>     > thanks again!
>     >         >     >>     > >
>     >         >     >>     > > On Thu, Apr 16, 2020 at 11:09 AM Christofer
> Dutz <
>     >         >     >>     > > christofer.d...@c-ware.de>
>     >         >     >>     > > wrote:
>     >         >     >>     > >
>     >         >     >>     > > > Hi Andrew,
>     >         >     >>     > > >
>     >         >     >>     > > > guess I'll start with the fork and
> contact you
>     > folks on
>     >         > slack.
>     >         >     >>     > > >
>     >         >     >>     > > > Chris
>     >         >     >>     > > >
>     >         >     >>     > > >
>     >         >     >>     > > >
>     >         >     >>     > > > Am 16.04.20, 19:43 schrieb "Andrew
> Musselman" <
>     >         > a...@apache.org>:
>     >         >     >>     > > >
>     >         >     >>     > > >     Chris, thank you for your help..
>     >         >     >>     > > >
>     >         >     >>     > > >     Yeah if you fork what's in master you
> can
>     > see what
>     >         > state
>     >         >     >> it's in;
>     >         >     >>     > we
>     >         >     >>     > > > are in
>     >         >     >>     > > >     the #mahout channel in tge-asf slack
> and
>     > this is also
>     >         > a
>     >         >     >> fine way to
>     >         >     >>     > > > keep
>     >         >     >>     > > >     track of discussion.
>     >         >     >>     > > >
>     >         >     >>     > > >     We could file a JIRA ticket as well,
>     > however you
>     >         > prefer to
>     >         >     >> work.
>     >         >     >>     > > >
>     >         >     >>     > > >     Best
>     >         >     >>     > > >     Andrew
>     >         >     >>     > > >
>     >         >     >>     > > >     On Thu, Apr 16, 2020 at 06:59
> Christofer
>     > Dutz <
>     >         >     >>     > > > christofer.d...@c-ware.de>
>     >         >     >>     > > >     wrote:
>     >         >     >>     > > >
>     >         >     >>     > > >     > Hi Trevor,
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > ok ... first of all ... the Mahout
> PMC is
>     > defining a
>     >         >     >> "community
>     >         >     >>     > > >     > maintained" library which is not
>     > maintained by the
>     >         > mahout
>     >         >     >> PMC?!?!
>     >         >     >>     > > >     > I thought at Apache everything is
> about
>     > Community
>     >         > over
>     >         >     >> code. So
>     >         >     >>     > is
>     >         >     >>     > > a
>     >         >     >>     > > >     > company driving the non-community
> stuff?
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > But back to your build issues:
>     >         >     >>     > > >     > I had a look and I too encountered
> these
>     > comments
>     >         > and
>     >         >     >> remarks and
>     >         >     >>     > > >     > sometimes patterns I recognized and
> could
>     > imagine
>     >         > why
>     >         >     >> they were
>     >         >     >>     > > > created.
>     >         >     >>     > > >     > Yes quite a bit of the build could
> be
>     > cleaned up and
>     >         >     >> simplified a
>     >         >     >>     > > > lot.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > So how about I create a fork and
> try to
>     > do a
>     >         > cleanup of
>     >         >     >> the
>     >         >     >>     > build.
>     >         >     >>     > > >     > Usually I also leave comments about
> what
>     > I do as I
>     >         > hope
>     >         >     >> I'll not
>     >         >     >>     > be
>     >         >     >>     > > > the
>     >         >     >>     > > >     > only one maintaining a build and
>     > documenting things
>     >         > helps
>     >         >     >> people
>     >         >     >>     > > > feel more
>     >         >     >>     > > >     > confident.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > However in some cases I will have
>     > questions ... so
>     >         > would
>     >         >     >> someone
>     >         >     >>     > be
>     >         >     >>     > > >     > available on Slack for quick
> questions?
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > Usually switching to another build
> system
>     > does
>     >         > solve some
>     >         >     >>     > problems
>     >         >     >>     > > > ...
>     >         >     >>     > > >     > mostly the reason to switch is that
> it
>     > solved the
>     >         > main
>     >         >     >> problem
>     >         >     >>     > that
>     >         >     >>     > > > you are
>     >         >     >>     > > >     > having with the old.
>     >         >     >>     > > >     > However you usually notice too late
> that
>     > you get
>     >         > yourself
>     >         >     >> a lot
>     >         >     >>     > of
>     >         >     >>     > > > new
>     >         >     >>     > > >     > problems. I remember doing some
> contract
>     > work for an
>     >         >     >> insurance
>     >         >     >>     > > > company and
>     >         >     >>     > > >     > they were totally down Maven-road
> but
>     > then had to
>     >         > build
>     >         >     >> something
>     >         >     >>     > > > with SBT
>     >         >     >>     > > >     > ... in the end I compiled the thing
> on my
>     > laptop,
>     >         > copied
>     >         >     >> it to a
>     >         >     >>     > > USB
>     >         >     >>     > > > stick
>     >         >     >>     > > >     > and told the people what was on the
> stick
>     > and that
>     >         > I'll be
>     >         >     >>     > having a
>     >         >     >>     > > > coffee
>     >         >     >>     > > >     > and will be back in 30 minutes.
> When I
>     > came back
>     >         > the sick
>     >         >     >> wasn't
>     >         >     >>     > at
>     >         >     >>     > > > the
>     >         >     >>     > > >     > same place and the build problem was
>     > "solved" ;-)
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > So I think it's quite good to stick
> to
>     > maven ...
>     >         > that is
>     >         >     >> very
>     >         >     >>     > > > mature, you
>     >         >     >>     > > >     > can do almost everything you want
> with it
>     > and it
>     >         >     >> integrates
>     >         >     >>     > > > perfectly into
>     >         >     >>     > > >     > the Apache infrastructure.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > But that's just my opinion.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > So if you want me to help, I'll be
> happy
>     > to be of
>     >         >     >> assistance.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > Chris
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >
>     >         >     >>     > > >     > Am 16.04.20, 15:28 schrieb "Trevor
> Grant"
>     > <
>     >         >     >>     > > trevor.d.gr...@gmail.com
>     >         >     >>     > > > >:
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     Hey Christopher,
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     I would agree with what Stevo
>     > outlined but add
>     >         > some
>     >         >     >> more
>     >         >     >>     > > context
>     >         >     >>     > > > and a
>     >         >     >>     > > >     >     couple related JIRA issues.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     For 0.14.0 We did a big
> refactor and
>     > finally
>     >         > moved the
>     >         >     >>     > > MapReduce
>     >         >     >>     > > > based
>     >         >     >>     > > >     >     Mahout all into what we called
>     > "community/"
>     >         > that is
>     >         >     >> community
>     >         >     >>     > > >     > maintained,
>     >         >     >>     > > >     >     which is to say, we're not
>     > maintaining it
>     >         > anymore
>     >         >     >> (sunset
>     >         >     >>     > > began I
>     >         >     >>     > > >     > think in
>     >         >     >>     > > >     >     2015).
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     But all of our POMs were so
> huge and
>     > fat because
>     >         >     >> they'd been
>     >         >     >>     > > > layered up
>     >         >     >>     > > >     >     over the years by people coming
> and
>     > going and
>     >         >     >> dropping in
>     >         >     >>     > > code. I
>     >         >     >>     > > >     > wouldn't
>     >         >     >>     > > >     >     call these drive- bys, its just
> been
>     > over 10
>     >         > years
>     >         >     >> and people
>     >         >     >>     > > > come and
>     >         >     >>     > > >     > go.
>     >         >     >>     > > >     >     Such is the life of Apache
> Projects.
>     > So we had a
>     >         >     >> situation
>     >         >     >>     > > where
>     >         >     >>     > > > a lot
>     >         >     >>     > > >     > of
>     >         >     >>     > > >     >     the old Map Reduce stuff and
> the POMs
>     > were
>     >         > considered
>     >         >     >>     > > > "old-magic" no
>     >         >     >>     > > >     > one
>     >         >     >>     > > >     >     really knew how it was all tied
>     > together, but we
>     >         >     >> didn't want
>     >         >     >>     > to
>     >         >     >>     > > > mess
>     >         >     >>     > > >     > with
>     >         >     >>     > > >     >     it for fear of breaking
> something in
>     > the "new"
>     >         > Mahout
>     >         >     >> (aka
>     >         >     >>     > > > Samsar)
>     >         >     >>     > > >     > which is
>     >         >     >>     > > >     >     the Scala/Spark based library
> that it
>     > is now*
>     >         > (to
>     >         >     >> others in
>     >         >     >>     > the
>     >         >     >>     > > >     > community:
>     >         >     >>     > > >     >     I know it runs on other
> engines, but
>     > for
>     >         > simplicity,
>     >         >     >> I'm just
>     >         >     >>     > > > calling
>     >         >     >>     > > >     > it
>     >         >     >>     > > >     >     "runs-on-spark").
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     For 0.14.0 We decided to trim
> out as
>     > much of
>     >         > that
>     >         >     >> which was
>     >         >     >>     > > > possible.
>     >         >     >>     > > >     > We
>     >         >     >>     > > >     >     did some major liposuction on
> POMs,
>     > re organized
>     >         >     >> things, etc.
>     >         >     >>     > > > This was
>     >         >     >>     > > >     > done
>     >         >     >>     > > >     >     by commenting out a section,
> then
>     > seeing if it
>     >         > would
>     >         >     >> still
>     >         >     >>     > > > build. So
>     >         >     >>     > > >     > the
>     >         >     >>     > > >     >     current release
>     >         >     >>     > > >     >     _does_ build. And aside for
> some CLI
>     > driver
>     >         > issues
>     >         >     >> which are
>     >         >     >>     > > > outlined
>     >         >     >>     > > >     > in
>     >         >     >>     > > >     >     [1], the project runs fairly
> smooth.
>     > (An SBT
>     >         > would
>     >         >     >> probably
>     >         >     >>     > > > solve [1],
>     >         >     >>     > > >     > I
>     >         >     >>     > > >     >     believe Pat Ferrel has made his
> own
>     > SBT script
>     >         > to
>     >         >     >> compile
>     >         >     >>     > > > Mahout, which
>     >         >     >>     > > >     >     solved that problem for them).
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     The issue we ran into with the
>     > releases (and the
>     >         >     >> reason I
>     >         >     >>     > think
>     >         >     >>     > > > you're
>     >         >     >>     > > >     >     here), is that we also somewhere
>     > along the line
>     >         >     >> commented out
>     >         >     >>     > > > something
>     >         >     >>     > > >     >     that was important to the
> release
>     > process.
>     >         > Hence why
>     >         >     >> 0.14.0
>     >         >     >>     > > > released
>     >         >     >>     > > >     > source
>     >         >     >>     > > >     >     only.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     Since 2008, there has been a
> lot of
>     > great work
>     >         > on
>     >         >     >> generating
>     >         >     >>     > > > plugins
>     >         >     >>     > > >     > for
>     >         >     >>     > > >     >     doing Apache releases. Instead
> of the
>     > awkward
>     >         > hacks
>     >         >     >> that made
>     >         >     >>     > > up
>     >         >     >>     > > > the
>     >         >     >>     > > >     > old
>     >         >     >>     > > >     >     poms (literally comments that
> said,
>     > "this is a
>     >         > hack,
>     >         >     >> there's
>     >         >     >>     > > > supposedly
>     >         >     >>     > > >     >     something better coming from
> ..."
>     > dated like
>     >         > 2012),
>     >         >     >> we would
>     >         >     >>     > > > like to
>     >         >     >>     > > >     > do it
>     >         >     >>     > > >     >     the "right way" and incorporate
> the
>     > appropriate
>     >         >     >> plugins.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     Refactoring to SBT was _one_
> proposed
>     > solution.
>     >         > We're
>     >         >     >> also OK
>     >         >     >>     > > >     > continuing to
>     >         >     >>     > > >     >     use Maven, and I agree with
> what you
>     > said about
>     >         > the
>     >         >     >> cross
>     >         >     >>     > > > compiling. We
>     >         >     >>     > > >     >     actually have a script that just
>     > changes the
>     >         > scala
>     >         >     >> version.
>     >         >     >>     > We
>     >         >     >>     > > > tried
>     >         >     >>     > > >     > using
>     >         >     >>     > > >     >     the classifiers but there were
> issues
>     > in SBT,
>     >         > but the
>     >         >     >> way
>     >         >     >>     > > you're
>     >         >     >>     > > >     > proposing
>     >         >     >>     > > >     >     sounds a lot more pro than the
> route
>     > we were
>     >         > trying
>     >         >     >> for.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     That said- we'd be OK just
> releasing
>     > one
>     >         > scala/spark
>     >         >     >> version
>     >         >     >>     > at
>     >         >     >>     > > > a time.
>     >         >     >>     > > >     >     But getting the convenience
> binaries
>     > to
>     >         >     >> release/publish would
>     >         >     >>     > > be
>     >         >     >>     > > > a
>     >         >     >>     > > >     > major
>     >         >     >>     > > >     >     first step.
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     Also, we really appreciate the
> help,
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     tg
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     [1]
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >
>     >         >     >>     > > >
>     >         >     >>     > >
>     >         >     >>     >
>     >         >     >>
>     >         >
>     >
> https://issues.apache.org/jira/projects/MAHOUT/issues/MAHOUT-2093?filter=allopenissues
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     On Thu, Apr 16, 2020 at 4:50 AM
>     > Christofer Dutz
>     >         > <
>     >         >     >>     > > >     > christofer.d...@c-ware.de>
>     >         >     >>     > > >     >     wrote:
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >     > Hi Stevo,
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > so let me summarize what I
>     > understood:
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > - There are some modules in
> mahout
>     > that are
>     >         > built
>     >         >     >> with
>     >         >     >>     > Scala,
>     >         >     >>     > > > some
>     >         >     >>     > > >     > with
>     >         >     >>     > > >     >     > java and some with both (At
> least
>     > that's what
>     >         > I see
>     >         >     >> when
>     >         >     >>     > > > checking
>     >         >     >>     > > >     > out the
>     >         >     >>     > > >     >     > project)
>     >         >     >>     > > >     >     > - The current build uses
> Scala 2.11
>     > to build
>     >         > the
>     >         >     >> Scala
>     >         >     >>     > code.
>     >         >     >>     > > >     >     > - The resulting libraries are
> only
>     > compatible
>     >         > with
>     >         >     >> Scala
>     >         >     >>     > 2.11
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > Now you want to also publish
>     > versions
>     >         > compatible
>     >         >     >> with Scala
>     >         >     >>     > > > 2.12?
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > If that's the case I think
> Maven
>     > could easily
>     >         > add
>     >         >     >> multiple
>     >         >     >>     > > > executions
>     >         >     >>     > > >     >     > where each compile compiles to
>     > different
>     >         > output
>     >         >     >>     > directories:
>     >         >     >>     > > >     >     > - Java --> target/classes
>     >         >     >>     > > >     >     > - Scala 2.11 -->
> target/classes-2.11
>     >         >     >>     > > >     >     > - Scala 2.12 -->
> target/classes-2.12
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > Then the packaging would also
> need
>     > a second
>     >         >     >> execution ...
>     >         >     >>     > > each
>     >         >     >>     > > > of the
>     >         >     >>     > > >     >     > executions bundling the
> classes and
>     > the
>     >         >     >> corresponding scala
>     >         >     >>     > > > output.
>     >         >     >>     > > >     >     > Ideally I would probably use
> maven
>     >         > classifiers to
>     >         >     >>     > distinguish
>     >         >     >>     > > > the
>     >         >     >>     > > >     >     > artifacts.
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > <dependency>
>     >         >     >>     > > >     >     >
>     >  <groupId>org.apache.mahout</groupId>
>     >         >     >>     > > >     >     >
>     >  <artifactId>mahout-spark</artifactId>
>     >         >     >>     > > >     >     >
>  <version>14.1-SNAPSHOT</version>
>     >         >     >>     > > >     >     >
>  <classifier>2.11</classifier>
>     >         >     >>     > > >     >     > </dependency>
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > Then it should all work in a
> normal
>     > maven
>     >         > build. In
>     >         >     >> the
>     >         >     >>     > > >     > distributions you
>     >         >     >>     > > >     >     > could also filter the versions
>     > according to
>     >         > their
>     >         >     >>     > > classifiers.
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > So if this is the case, I
> could
>     > help you with
>     >         > this.
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > Chris
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     > Am 16.04.20, 09:39 schrieb
> "Stevo
>     > Slavić" <
>     >         >     >>     > ssla...@gmail.com
>     >         >     >>     > > >:
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     >     Disclaimer: I'm not active
>     > Mahout
>     >         > maintainer
>     >         >     >> for quite
>     >         >     >>     > a
>     >         >     >>     > > > while,
>     >         >     >>     > > >     > have
>     >         >     >>     > > >     >     > some
>     >         >     >>     > > >     >     >     historical perspective,
> take it
>     > with a
>     >         > grain of
>     >         >     >> salt,
>     >         >     >>     > > > could be
>     >         >     >>     > > >     > I'm
>     >         >     >>     > > >     >     > missing
>     >         >     >>     > > >     >     >     the whole point you were
>     > approached for
>     >         > by a
>     >         >     >> wide
>     >         >     >>     > margin
>     >         >     >>     > > of
>     >         >     >>     > > >     > error.
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     >     At a point Mahout, some
> of its
>     > modules,
>     >         > have
>     >         >     >> turned
>     >         >     >>     > into
>     >         >     >>     > > a
>     >         >     >>     > > > scala
>     >         >     >>     > > >     >     >     library, and there was
> need to
>     > cross
>     >         > publish
>     >         >     >> those
>     >         >     >>     > > modules,
>     >         >     >>     > > >     > across
>     >         >     >>     > > >     >     >     different scala versions.
> Back
>     > than Maven
>     >         > scala
>     >         >     >> plugin
>     >         >     >>     > > > didn't
>     >         >     >>     > > >     > support
>     >         >     >>     > > >     >     > cross
>     >         >     >>     > > >     >     >     publishing, it doesn't
> fit well
>     > with
>     >         > Maven's
>     >         >     >> build
>     >         >     >>     > > > lifecycle
>     >         >     >>     > > >     > concept
>     >         >     >>     > > >     >     >     (multiple compile phases
> - one
>     > for each
>     >         > scala
>     >         >     >> version,
>     >         >     >>     > > and
>     >         >     >>     > > > what
>     >         >     >>     > > >     > not
>     >         >     >>     > > >     >     > would
>     >         >     >>     > > >     >     >     be needed). Switching to
> sbt
>     > could have
>     >         > solved
>     >         >     >> the
>     >         >     >>     > > problem.
>     >         >     >>     > > >     > Switch was
>     >         >     >>     > > >     >     >     deemed to be too big
> task, even
>     > though
>     >         > ages
>     >         >     >> have been
>     >         >     >>     > > > spent on
>     >         >     >>     > > >     > trying
>     >         >     >>     > > >     >     > to
>     >         >     >>     > > >     >     >     apply Maven (profiles) +
> bash
>     > scripts and
>     >         > what
>     >         >     >> not to
>     >         >     >>     > > > solve the
>     >         >     >>     > > >     >     > problem.
>     >         >     >>     > > >     >     >     Trying to apply same
> approach
>     > over and
>     >         > over
>     >         >     >> again and
>     >         >     >>     > > > expecting
>     >         >     >>     > > >     >     > different
>     >         >     >>     > > >     >     >     results is not smart, no
> expert
>     > can help
>     >         > there.
>     >         >     >> Mahout
>     >         >     >>     > > >     > maintainers and
>     >         >     >>     > > >     >     >     contributors, should
> consider
>     > alternative
>     >         >     >> approach, one
>     >         >     >>     > > of
>     >         >     >>     > > > them
>     >         >     >>     > > >     > being
>     >         >     >>     > > >     >     >     switching to sbt - it's
> scala
>     > native,
>     >         > supports
>     >         >     >> scala
>     >         >     >>     > > cross
>     >         >     >>     > > >     > publishing,
>     >         >     >>     > > >     >     >     supports publishing Maven
>     > compatible
>     >         > release
>     >         >     >> metadata
>     >         >     >>     > and
>     >         >     >>     > > >     > binaries.
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     >     Kind regards,
>     >         >     >>     > > >     >     >     Stevo Slavic.
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     >     On Thu, Apr 16, 2020 at
> 9:15 AM
>     >         > Christofer Dutz
>     >         >     >> <
>     >         >     >>     > > >     >     > christofer.d...@c-ware.de>
>     >         >     >>     > > >     >     >     wrote:
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     >     > Hi folks,
>     >         >     >>     > > >     >     >     >
>     >         >     >>     > > >     >     >     > my name is Chris and I’m
>     > involved in
>     >         > quite a
>     >         >     >> lot of
>     >         >     >>     > > > Apache
>     >         >     >>     > > >     > projects.
>     >         >     >>     > > >     >     >     > Justin approached me
> this
>     > morning,
>     >         > asking me
>     >         >     >> if I
>     >         >     >>     > could
>     >         >     >>     > > >     > perhaps help
>     >         >     >>     > > >     >     > you.
>     >         >     >>     > > >     >     >     > He told me you were
> having
>     > trouble with
>     >         > doing
>     >         >     >> Maven
>     >         >     >>     > > > releases.
>     >         >     >>     > > >     >     >     >
>     >         >     >>     > > >     >     >     > As Maven releases are my
>     > specialty,
>     >         > could you
>     >         >     >> please
>     >         >     >>     > > > summarize
>     >         >     >>     > > >     > the
>     >         >     >>     > > >     >     > issues
>     >         >     >>     > > >     >     >     > you are having?
>     >         >     >>     > > >     >     >     >
>     >         >     >>     > > >     >     >     > Chris
>     >         >     >>     > > >     >     >     >
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >     >
>     >         >     >>     > > >     >
>     >         >     >>     > > >     >
>     >         >     >>     > > >
>     >         >     >>     > > >
>     >         >     >>     > >
>     >         >     >>     >
>     >         >     >>
>     >         >     >>
>     >         >
>     >         >
>     >
>     >
>     >
>
>
>

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