well Gradle is used in CI environments all over the place, so it must
work.
But I think we need some different configurations in the Gradle command
used. For example, it is highly suggested that the Gradle daemon be
disabled in CI but I'm not sure all of our jobs actually do that. I'll look
into that...
I wouldn't mind having the Gradle deamon always on, if it helps we
could even pre-load it with some tuned configuration.
The only drawback I see is to make it easy to upgrade Gradle version,
in case one needs, without having to go through server configuration
scripts.
We need strict isolation about writes in the cache though; for now
I'll disable it, not least for the concerns that Yoann and Gunnar
pointed out, then we can experiment with cool ideas more carefully.
Funny, one would expect to know by know about the perils of a
distributed cache :)
On Tue, Jan 16, 2018 at 3:30 PM Sanne Grinovero <sanne(a)hibernate.org> wrote:
>
> Yes I did it for Gradle too, sorry. The `/efs-maven-artifacts` is the
> guilty mount point.
>
> I don't know any quick solutions for the various concerns you all
> raised, so I'll roll this back tonight.
>
> It's good to know that it's not too hard to have a shared FS between
> these machines; needs better planning though.
>
> Thanks,
> Sanne
>
> On 16 January 2018 at 19:41, Steve Ebersole <steve(a)hibernate.org> wrote:
> > Did you happen to do the same for Gradle caches?
> >
> > Some jobs are failing:
> >
> >
> > * What went wrong:
> > Could not resolve all dependencies for configuration
> > ':buildSrc:runtimeClasspath'.
> >> Timeout waiting to lock artifact cache
> >> (/efs-maven-artifacts/.gradle/caches/modules-2). It is currently in use
> >> by
> >> another Gradle instance.
> > Owner PID: 1423
> > Our PID: 10249
> > Owner Operation: resolve configuration ':classpath'
> > Our operation:
> > Lock file:
> > /efs-maven-artifacts/.gradle/caches/modules-2/modules-2.lock
> >
> >
> >
> > On Mon, Jan 15, 2018 at 5:06 AM Yoann Rodiere <yoann(a)hibernate.org>
> > wrote:
> >>
> >> > We should reconfigure those to not "install" - that's
actually a bad
> >> > habit, legacy from Maven 2 times - people nowadays recommend using
> >> > "mvn clean verify", especially on CI environments.
> >>
> >> I could not agree more, that would be cleaner, but that's not possible.
> >> And
> >> believe me, I tried hard. Last time I checked, some of the plugins we
> >> use
> >> with dynamic dependency resolution would ignore the artifacts being
> >> built,
> >> and would always fetch the artifacts from the Maven repos (for
> >> SNAPSHOTs,
> >> they would end up using nightlies).
> >> I'm not talking about when we use standard maven markup to declare
> >> dependencies, but when the plugin itself has to fetch dependencies
> >> "dynamically", which happens when we setup a WildFly server with
our
> >> own
> >> modules in particular. See maven-dependency-plugin's
"artifactItems"
> >> configuration.
> >>
> >>
> >>
> >> On Mon, 15 Jan 2018 at 11:29 Sanne Grinovero <sanne(a)hibernate.org>
> >> wrote:
> >>
> >> > On 15 January 2018 at 08:42, Yoann Rodiere <yoann(a)hibernate.org>
> >> > wrote:
> >> > > Thanks Sanne !
> >> > >
> >> > > I have one question...
> >> > >
> >> > >> Please never rely on this as "storage": it's
just meant as cache
> >> > >> and
> >> > >> we reserve the right to wipe it all out at any time.
> >> > >
> >> > > I gather you say that so that we don't try to
"release" artifacts
> >> > > into
> >> > this
> >> > > cache? But temporary storage for the duration of one build will
> >> > > still
> >> > > be
> >> > > safe?
> >> > >
> >> > > Because our builds obviously rely on the local repository for
> >> > > short-term
> >> > > storage (for the duration of the build). For example the
> >> > > dependencies
> >> > > are
> >> > > only checked and downloaded if necessary at the beginning of the
> >> > > build,
> >> > and
> >> > > then are expected to exist in the local repository until the
build
> >> > > stops.
> >> > > Another example: our WildFly modules are first built and
installed
> >> > > in
> >> > > the
> >> > > "modules" subproject, and later "fetched" from
the local repository
> >> > > in
> >> > the
> >> > > "integrationtest/wildfly" subproject.
> >> > >
> >> > > If we were to clear the cache during a build, things would
probably
> >> > > go
> >> > > wrong. Worse, if two parallel builds were to install the same
> >> > > artifacts
> >> > > (e.g. hibernate-search-engine version 5.9.0-SNAPSHOT), we would
run
> >> > > the
> >> > risk
> >> > > of testing the wrong "version" of this artifact in one
of the
> >> > > builds...
> >> >
> >> > SNAPSHOT being installed are indeed a problem, e.g the PR testing
> >> > jobs
> >> > could conflict with the regular master jobs.
> >> > We should reconfigure those to not "install" - that's
actually a bad
> >> > habit, legacy from Maven 2 times - people nowadays recommend using
> >> > "mvn clean verify", especially on CI environments.
> >> >
> >> > I agree about the perils of clearing the cache during in-progress
> >> > builds
> >> > too.
> >> >
> >> > I just meant to warn that we don't have any backup plan in place,
and
> >> > I do plan to just wipe the whole thing occasionally:
> >> > - when we have any direct need, e.g. currupted downloads
> >> > - when it gets too large
> >> > - if it gets too expensive
> >> > - regularly, just to "practice" that everything works with
an empty
> >> > cache
> >> >
> >> > Also our "disaster recovery" plan to rebuild all
infrastructure will
> >> > always assume it's ok to reboot with having this file system
empty.
> >> >
> >> > Thanks,
> >> > Sanne
> >> >
> >> > >
> >> > >
> >> > > On Sun, 14 Jan 2018 at 01:18 Sanne Grinovero
<sanne(a)hibernate.org>
> >> > wrote:
> >> > >>
> >> > >> Hi all,
> >> > >>
> >> > >> while the new build machines are fast, some of you pointed
out
> >> > >> we're
> >> > >> now spending a relative high amount of time downloading maven
> >> > >> dependencies, this problem being compounded by the fact we
"nuke"
> >> > >> idle
> >> > >> slaves shortly after they become idle.
> >> > >>
> >> > >> I just spent the day testing a distributed file system, and
it's
> >> > >> now
> >> > >> running in "production".
> >> > >> It's used exclusively to store the Gradle and Maven
caches. This
> >> > >> is
> >> > >> stateful and independent from the lifecycle of individual
slave
> >> > >> nodes.
> >> > >>
> >> > >> Unfortunately this solution is not viable for Docker images,
so
> >> > >> while
> >> > >> I experimented with the idea I backed off from moving the
docker
> >> > >> storage graph to a similar device. Please don't waste time
trying
> >> > >> that
> >> > >> w/o carefully reading the Docker documentation or talking with
me
> >> > >> :)
> >> > >> Also, beyond correctness of storage semantics, it's likely
far
> >> > >> less
> >> > >> efficient for Docker.
> >> > >>
> >> > >> To learn more about our new cache:
> >> > >> -
> >> > >>
> >> >
> >> >
> >> >
https://github.com/hibernate/ci.hibernate.org/commit/dc6e0a4bd09fb3ae6347...
> >> > >> -
https://docs.aws.amazon.com/efs/latest/ug/how-it-works.html
> >> > >>
> >> > >> I'd add that - because of other IO tuning in place -
writes might
> >> > >> appear out of order to other nodes, and conflicts are not
handled.
> >> > >> Shouldn't be a problem since snapshots now have
timestamps, but
> >> > >> this
> >> > >> might be something to keep in mind.
> >> > >>
> >> > >> N.B.
> >> > >> Please never rely on this as "storage": it's
just meant as cache
> >> > >> and
> >> > >> we reserve the right to wipe it all out at any time.
> >> > >>
> >> > >> Thanks,
> >> > >> Sanne
> >> > >> _______________________________________________
> >> > >> hibernate-dev mailing list
> >> > >> hibernate-dev(a)lists.jboss.org
> >> > >>
https://lists.jboss.org/mailman/listinfo/hibernate-dev
> >> > >
> >> > >
> >> > >
> >> > > --
> >> > > Yoann Rodiere
> >> > > yoann(a)hibernate.org / yrodiere(a)redhat.com
> >> > > Software Engineer
> >> > > Hibernate NoORM team
> >> >
> >>
> >>
> >> --
> >> Yoann Rodiere
> >> yoann(a)hibernate.org / yrodiere(a)redhat.com
> >> Software Engineer
> >> Hibernate NoORM team
> >> _______________________________________________
> >> hibernate-dev mailing list
> >> hibernate-dev(a)lists.jboss.org
> >>
https://lists.jboss.org/mailman/listinfo/hibernate-dev