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From Patrick Hunt <ph...@apache.org>
Subject Re: Decrease number of threads in Jenkins builds to reduce flakyness
Date Fri, 12 Oct 2018 14:52:55 GMT
iirc the number of threads was increased to improve performance. Reducing
is fine, but do we understand why it's failing? Perhaps it's finding real
issues as a result of the artificial concurrency/load.

Patrick

On Fri, Oct 12, 2018 at 7:12 AM Andor Molnar <andor@cloudera.com.invalid>
wrote:

> Thanks for the feedback.
> I'm running a few tests now: branch-3.5 on 2 threads and trunk on 4 threads
> to see what's the impact on the build time.
>
> Github PR job is hard to configure, because its settings are hard coded
> into a shell script in the codebase. I have to open PR for that.
>
> Andor
>
>
>
> On Fri, Oct 12, 2018 at 2:46 PM, Norbert Kalmar <
> nkalmar@cloudera.com.invalid> wrote:
>
> > +1, running the tests locally with 1 thread always passes (well, I run it
> > about 5 times, but still)
> > On the other hand, running it on 8 threads yields similarly flaky results
> > as Apache runs. (Although it is much faster, but if we have to run 6-8-10
> > times sometimes to get a green run...)
> >
> > Norbert
> >
> > On Fri, Oct 12, 2018 at 2:05 PM Enrico Olivelli <eolivelli@gmail.com>
> > wrote:
> >
> > > +1
> > >
> > > Enrico
> > >
> > > Il ven 12 ott 2018, 13:52 Andor Molnar <andor@apache.org> ha scritto:
> > >
> > > > Hi,
> > > >
> > > > What do you think of changing number of threads running unit tests in
> > > > Jenkins from current 8 to 4 or even 2?
> > > >
> > > > Running unit tests inside Cloudera environment on a single thread
> shows
> > > the
> > > > builds much more stable. That would be probably too slow, but maybe
> > > running
> > > > at least less threads would improve the situation.
> > > >
> > > > It's getting very annoying that I cannot get a green build on GitHub
> > with
> > > > only a few retests.
> > > >
> > > > Regards,
> > > > Andor
> > > >
> > > --
> > >
> > >
> > > -- Enrico Olivelli
> > >
> >
>

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