Re: > Are they using their own Travis CI pool, or did the switch to
an entirely different CI service?
I reached out to Wes and Krisztián from Apache Arrow PMC. They are
currently moving away from ASF's Travis to their own in-house metal
machines at [1] with custom CI application at [2]. They've seen
significant improvement w.r.t both much higher performance and
basically no resource waiting time, "night-and-day" difference
quoting Wes.
Re: > If we can just switch to our own Travis pool, just for our
project, then this might be something we can do fairly quickly?
I believe so, according to [3] and [4]
[1] https://ci.ursalabs.org/ <https://ci.ursalabs.org/#/>
[2] https://github.com/ursa-labs/ursabot
[3]
https://docs.travis-ci.com/user/migrate/open-source-repository-migration
[4]
https://docs.travis-ci.com/user/migrate/open-source-on-travis-ci-com
On Wed, Jul 3, 2019 at 12:01 AM Chesnay Schepler <ches...@apache.org
<mailto:ches...@apache.org>> wrote:
Are they using their own Travis CI pool, or did the switch to an
entirely different CI service?
If we can just switch to our own Travis pool, just for our
project, then
this might be something we can do fairly quickly?
On 03/07/2019 05:55, Bowen Li wrote:
> I responded in the INFRA ticket [1] that I believe they are
using a wrong
> metric against Flink and the total build time is a completely
different
> thing than guaranteed build capacity.
>
> My response:
>
> "As mentioned above, since I started to pay attention to Flink's
build
> queue a few tens of days ago, I'm in Seattle and I saw no build
was kicking
> off in PST daytime in weekdays for Flink. Our teammates in China
and Europe
> have also reported similar observations. So we need to evaluate
how the
> large total build time came from - if 1) your number and 2) our
> observations from three locations that cover pretty much a full
day, are
> all true, I **guess** one reason can be that - highly likely the
extra
> build time came from weekends when other Apache projects may be
idle and
> Flink just drains hard its congested queue.
>
> Please be aware of that we're not complaining about the lack of
resources
> in general, I'm complaining about the lack of **stable,
dedicated**
> resources. An example for the latter one is, currently even if
no build is
> in Flink's queue and I submit a request to be the queue head
in PST
> morning, my build won't even start in 6-8+h. That is an absurd
amount of
> waiting time.
>
> That's saying, if ASF INFRA decides to adopt a quota system and
grants
> Flink five DEDICATED servers that runs all the time only for
Flink, that'll
> be PERFECT and can totally solve our problem now.
>
> Please be aware of that we're not complaining about the lack of
resources
> in general, I'm complaining about the lack of **stable,
dedicated**
> resources. An example for the latter one is, currently even if
no build is
> in Flink's queue and I submit a request to be the queue head
in PST
> morning, my build won't even start in 6-8+h. That is an absurd
amount of
> waiting time.
>
>
> That's saying, if ASF INFRA decides to adopt a quota system and
grants
> Flink five DEDICATED servers that runs all the time only for
Flink, that'll
> be PERFECT and can totally solve our problem now.
>
> I feel what's missing in the ASF INFRA's Travis resource pool is
some level
> of build capacity SLAs and certainty"
>
>
> Again, I believe there are differences in nature of these two
problems,
> long build time v.s. lack of dedicated build resource. That's
saying,
> shortening build time may relieve the situation, and may not.
I'm sightly
> negative on disabling IT cases for PRs, due to the downside is
that we are
> at risk of any potential bugs in PR that UTs doesn't catch, and
may cost a
> lot more to fix and if it slows others down or even block
others, but am
> open to others opinions on it.
>
> AFAICT from INFRA ticket[1], donating to ASF INFRA won't be
feasible to
> solve our problem since INFRA's pool is fully shared and they
have no
> control and finer insights over resource allocation to a
specific Apache
> project. As mentioned in [1], Apache Arrow is moving away from
ASF INFRA
> Travis pool (they are actually surprised Flink hasn't plan to do
so). I
> know that Spark is on its own build infra. If we all agree that
funding our
> own build infra, I'd be glad to help investigate any potential
options
> after releasing 1.9 since I'm super busy with 1.9 now.
>
> [1] https://issues.apache.org/jira/browse/INFRA-18533
>
>
>
> On Tue, Jul 2, 2019 at 4:46 AM Chesnay Schepler
<ches...@apache.org <mailto:ches...@apache.org>> wrote:
>
>> As a short-term stopgap, since we can assume this issue to
become much
>> worse in the following days/weeks, we could disable IT cases in
PRs and
>> only run them on master.
>>
>> On 02/07/2019 12:03, Chesnay Schepler wrote:
>>> People really have to stop thinking that just because
something works
>>> for us it is also a good solution.
>>> Also, please remember that our builds run for 2h from start to
finish,
>>> and not the 14 _minutes_ it takes for zeppelin.
>>> We are dealing with an entirely different scale here, both in
terms of
>>> build times and number of builds.
>>>
>>> In this very thread people have been complaining about long
queue
>>> times for their builds. Surprise, other Apache projects have
been
>>> suffering the very same thing due to us not controlling our
build
>>> times. While switching services (be it Jenkins, CircleCI or
whatever)
>>> will possibly work for us (and these options are actually
attractive,
>>> like CircleCI's proper support for build artifacts), it will
also
>>> result in us likely negatively affecting other projects in
significant
>>> ways.
>>>
>>> Sure, the Jenkins setup has a good user experience for us, at
the cost
>>> of blocking Jenkins workers for a _lot_ of time. Right now we
have 25
>>> PR's in our queue; that's possibly 50h we'd consume of Jenkins
>>> resources, and the European contributors haven't even really
started yet.
>>>
>>> FYI, the latest INFRA response from INFRA-18533:
>>>
>>> "Our rough metrics shows that Flink used over 5800 hours of
build time
>>> last month. That is equal to EIGHT servers running 24/7 for
the ENTIRE
>>> MONTH. EIGHT. nonstop.
>>> When we discovered this last night, we discussed it some and
are going
>>> to tune down Flink to allow only five executors maximum. We
cannot
>>> allow Flink to consume so much of a Foundation shared
resource."
>>>
>>> So yes, we either
>>> a) have to heavily reduce our CI usage or
>>> b) fund our own, either maintaining it ourselves or donating
to Apache.
>>>
>>> On 02/07/2019 05:11, Bowen Li wrote:
>>>> By looking at the git history of the Jenkins script, its core
part
>>>> was finished in March 2017 (and only two minor update in
2017/2018),
>>>> so it's been running for over two years now and feels like
Zepplin
>>>> community has been quite happy with it. @Jeff Zhang
>>>> <mailto:zjf...@gmail.com <mailto:zjf...@gmail.com>> can you
share your insights and user
>>>> experience with the Jenkins+Travis approach?
>>>>
>>>> Things like:
>>>>
>>>> - has the approach completely solved the resource capacity
problem
>>>> for Zepplin community? is Zepplin community happy with the
result?
>>>> - is the whole configuration chain stable (e.g. uptime)
enough?
>>>> - how often do you need to maintain the Jenkins infra? how
many
>>>> people are usually involved in maintenance and bug-fixes?
>>>>
>>>> The downside of this approach seems mostly to be on the
maintenance
>>>> to me - maintain the script and Jenkins infra.
>>>>
>>>> ** Having Our Own Travis-CI.com Account **
>>>>
>>>> Another alternative I've been thinking of is to have our own
>>>> travis-ci.com <http://travis-ci.com> <http://travis-ci.com>
account with paid dedicated
>>>> resources. Note travis-ci.org <http://travis-ci.org>
<http://travis-ci.org> is the free
>>>> version and travis-ci.com <http://travis-ci.com>
<http://travis-ci.com> is the commercial
>>>> version. We currently use a shared resource pool managed by
ASK INFRA
>>>> team on travis-ci.org <http://travis-ci.org>
<http://travis-ci.org>, but we have no control
>>>> over it - we can't see how it's configured, how much
resources are
>>>> available, how resources are allocated among Apache projects,
etc.
>>>> The nice thing about having an account on travis-ci.com
<http://travis-ci.com>
>>>> <http://travis-ci.com> are:
>>>>
>>>> - relatively low cost with much better resource guarantee
than what
>>>> we currently have [1]: $249/month with 5 dedicated
concurrency,
>>>> $489/month with 10 concurrency
>>>> - low maintenance work compared to using Jenkins
>>>> - (potentially) no migration cost according to Travis's doc
[2]
>>>> (pending verification)
>>>> - full control over the build capacity/configuration
compared to
>>>> using ASF INFRA's pool
>>>>
>>>> I'd be surprised if we as such a vibrant community cannot
find and
>>>> fund $249*12=$2988 a year in exchange for a much better
developer
>>>> experience and much higher productivity.
>>>>
>>>> [1] https://travis-ci.com/plans
>>>> [2]
>>>>
>>
https://docs.travis-ci.com/user/migrate/open-source-repository-migration
>>>> On Sat, Jun 29, 2019 at 8:39 AM Chesnay Schepler
<ches...@apache.org <mailto:ches...@apache.org>
>>>> <mailto:ches...@apache.org <mailto:ches...@apache.org>>>
wrote:
>>>>
>>>> So yes, the Jenkins job keeps pulling the state from
Travis until it
>>>> finishes.
>>>>
>>>> Note sure I'm comfortable with the idea of using Jenkins
workers
>>>> just to
>>>> idle for a several hours.
>>>>
>>>> On 29/06/2019 14:56, Jeff Zhang wrote:
>>>> > Here's what zeppelin community did, we make a python
script to
>>>> check the
>>>> > build status of pull request.
>>>> > Here's script:
>>>> >
https://github.com/apache/zeppelin/blob/master/travis_check.py
>>>> >
>>>> > And this is the script we used in Jenkins build job.
>>>> >
>>>> > if [ -f "travis_check.py" ]; then
>>>> > git log -n 1
>>>> > STATUS=$(curl -s $BUILD_URL | grep -e "GitHub pull
>>>> request.*from.*" | sed
>>>> > 's/.*GitHub pull request <a
>>>> > href=\"\(https[^"]*\).*from[^"]*.\(https[^"]*\).*/\1
\2/g')
>>>> > AUTHOR=$(echo $STATUS | sed 's/.*[/]\(.*\)$/\1/g')
>>>> > PR=$(echo $STATUS | awk '{print $1}' | sed
>>>> 's/.*[/]\(.*\)$/\1/g')
>>>> > #COMMIT=$(git log -n 1 | grep "^Merge:" | awk
'{print $3}')
>>>> > #if [ -z $COMMIT ]; then
>>>> > # COMMIT=$(curl -s
>>>> https://api.github.com/repos/apache/zeppelin/pulls/$PR
>>>> > | grep -e "\"label\":" -e "\"ref\":" -e "\"sha\":" |
tr '\n' ' '
>>>> | sed
>>>> > 's/\(.*sha[^,]*,\)\(.*ref.*\)/\1 = \2/g' | tr = '\n' |
grep -v
>>>> "apache:" |
>>>> > sed 's/.*sha.[^"]*["]\([^"]*\).*/\1/g')
>>>> > #fi
>>>> >
>>>> > # get commit hash from PR
>>>> > COMMIT=$(curl -s
>>>> https://api.github.com/repos/apache/zeppelin/pulls/$PR |
>>>> > grep -e "\"label\":" -e "\"ref\":" -e "\"sha\":" | tr
'\n' ' '
>>>> | sed
>>>> > 's/\(.*sha[^,]*,\)\(.*ref.*\)/\1 = \2/g' | tr = '\n' |
grep -v
>>>> "apache:" |
>>>> > sed 's/.*sha.[^"]*["]\([^"]*\).*/\1/g')
>>>> > sleep 30 # sleep few moment to wait travis starts
the build
>>>> > RET_CODE=0
>>>> > python ./travis_check.py ${AUTHOR} ${COMMIT} ||
RET_CODE=$?
>>>> > if [ $RET_CODE -eq 2 ]; then # try with repository
name when
>>>> travis-ci is
>>>> > not available in the account
>>>> > RET_CODE=0
>>>> > AUTHOR=$(curl -s
>>>> https://api.github.com/repos/apache/zeppelin/pulls/$PR
>>>> > | grep '"full_name":' | grep -v "apache/zeppelin" | sed
>>>> > 's/.*[:][^"]*["]\([^/]*\).*/\1/g')
>>>> > python ./travis_check.py ${AUTHOR} ${COMMIT} ||
RET_CODE=$?
>>>> > fi
>>>> >
>>>> > if [ $RET_CODE -eq 2 ]; then # fail with can't find
build
>>>> information in
>>>> > the travis
>>>> > set +x
>>>> > echo
"-----------------------------------------------------"
>>>> > echo "Looks like travis-ci is not configured for
your fork."
>>>> > echo "Please setup by swich on 'zeppelin'
repository at
>>>> > https://travis-ci.org/profile and travis-ci."
>>>> > echo "And then make sure 'Build branch updates'
option is
>>>> enabled in
>>>> > the settings
https://travis-ci.org/${AUTHOR}/zeppelin/settings
<https://travis-ci.org/$%7BAUTHOR%7D/zeppelin/settings>
>>>> <https://travis-ci.org/$%7BAUTHOR%7D/zeppelin/settings>."
>>>> > echo ""
>>>> > echo "To trigger CI after setup, you will need
ammend your
>>>> last commit
>>>> > with"
>>>> > echo "git commit --amend"
>>>> > echo "git push your-remote HEAD --force"
>>>> > echo ""
>>>> > echo "See
>>>> >
>>>>
>>
http://zeppelin.apache.org/contribution/contributions.html#continuous-integration
>>>> > ."
>>>> > fi
>>>> >
>>>> > exit $RET_CODE
>>>> > else
>>>> > set +x
>>>> > echo "travis_check.py does not exists"
>>>> > exit 1
>>>> > fi
>>>> >
>>>> > Chesnay Schepler <ches...@apache.org
<mailto:ches...@apache.org>
>>>> <mailto:ches...@apache.org <mailto:ches...@apache.org>>>
于2019年6月29日周六 下午3:17写道：
>>>> >
>>>> >> Does this imply that a Jenkins job is active as long
as the
>>>> Travis build
>>>> >> runs?
>>>> >>
>>>> >> On 26/06/2019 21:28, Bowen Li wrote:
>>>> >>> Hi,
>>>> >>>
>>>> >>> @Dawid, I think the "long test running" as I
mentioned in the
>>>> first
>>>> >> email,
>>>> >>> also as you guys said, belongs to "a big effort
which is much
>>>> harder to
>>>> >>> accomplish in a short period of time and may deserve
its own
>>>> separate
>>>> >>> discussion". Thus I didn't include it in what we can
do in a
>>>> foreseeable
>>>> >>> short term.
>>>> >>>
>>>> >>> Besides, I don't think that's the ultimate reason
for lack of
>>>> build
>>>> >>> resources. Even if the build is shortened to
something like
>>>> 2h, the
>>>> >>> problems of no build machine works about 6 or more
hours in
>>>> PST daytime
>>>> >>> that I described will still happen, because no
machine from
>>>> ASF INFRA's
>>>> >>> pool is allocated to Flink. As I have paid close
attention to
>>>> the build
>>>> >>> queue in the past few weekdays, it's a pretty clear
pattern now.
>>>> >>>
>>>> >>> **The ultimate root cause** for that is - we don't
have any
>>>> **dedicated**
>>>> >>> build resources that we can stably rely on. I'm
actually ok to
>>>> wait for a
>>>> >>> long time if there are build requests running, it
means at
>>>> least we are
>>>> >>> making progress. But I'm not ok with no build
resource. A
>>>> better place I
>>>> >>> think we should aim at in short term is to always
have at
>>>> least a central
>>>> >>> pool (can be 3 or 5) of machines dedicated to build
Flink at
>>>> any time, or
>>>> >>> maybe use users resources.
>>>> >>>
>>>> >>> @Chesnay @Robert I synced with Jeff offline that
Zeppelin
>>>> community is
>>>> >>> using a Jenkins job to automatically build on users'
travis
>>>> account and
>>>> >>> link the result back to github PR. I guess the
Jenkins job
>>>> would fetch
>>>> >>> latest upstream master and build the PR against it.
Jeff has
>>>> filed
>>>> >> tickets
>>>> >>> to learn and get access to the Jenkins infra. It'll
better to
>>>> fully
>>>> >>> understand it first before judging this approach.
>>>> >>>
>>>> >>> I also heard good things about CircleCI, and ASF
INFRA seems
>>>> to have a
>>>> >> pool
>>>> >>> of build capacity there too. Can be an alternative
to consider.
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>> On Wed, Jun 26, 2019 at 12:44 AM Dawid Wysakowicz <
>>>> >> dwysakow...@apache.org
<mailto:dwysakow...@apache.org> <mailto:dwysakow...@apache.org
<mailto:dwysakow...@apache.org>>>
>>>> >>> wrote:
>>>> >>>
>>>> >>>> Sorry to jump in late, but I think Bowen missed the
most
>>>> important point
>>>> >>>> from Chesnay's previous message in the summary. The
ultimate
>>>> reason for
>>>> >>>> all the problems is that the tests take close to 2
hours to
>>>> run already.
>>>> >>>> I fully support this claim: "Unless people start
caring about
>>>> test times
>>>> >>>> before adding them, this issue cannot be solved"
>>>> >>>>
>>>> >>>> This is also another reason why using user's Travis
account
>>>> won't help.
>>>> >>>> Every few weeks we reach the user's time limit for
a single
>>>> profile.
>>>> >>>> This makes the user's builds simply fail, until we
either
>>>> properly
>>>> >>>> decrease the time the tests take (which I am not
sure we ever
>>>> did) or
>>>> >>>> postpone the problem by splitting into more
profiles. (Note
>>>> that the ASF
>>>> >>>> Travis account has higher time limits)
>>>> >>>>
>>>> >>>> Best,
>>>> >>>>
>>>> >>>> Dawid
>>>> >>>>
>>>> >>>> On 26/06/2019 09:36, Robert Metzger wrote:
>>>> >>>>> Do we know if using "the best" available hardware
would
>>>> improve the
>>>> >> build
>>>> >>>>> times?
>>>> >>>>> Imagine we would run the build on machines with
plenty of
>>>> main memory
>>>> >> to
>>>> >>>>> mount everything to ramdisk + the latest CPU
architecture?
>>>> >>>>>
>>>> >>>>> Throwing hardware at the problem could help reduce
the time
>>>> of an
>>>> >>>>> individual build, and using our own infrastructure
would
>>>> remove our
>>>> >>>>> dependency on Apache's Travis account (with the
obvious
>>>> downside of
>>>> >>>> having
>>>> >>>>> to maintain the infrastructure)
>>>> >>>>> We could use an open source travis alternative, to
have a
>>>> similar
>>>> >>>>> experience and make the migration easy.
>>>> >>>>>
>>>> >>>>>
>>>> >>>>> On Wed, Jun 26, 2019 at 9:34 AM Chesnay Schepler
>>>> <ches...@apache.org <mailto:ches...@apache.org>
<mailto:ches...@apache.org <mailto:ches...@apache.org>>>
>>>> >>>> wrote:
>>>> >>>>>> >From what I gathered, there's no special
sauce that the
>>>> Zeppelin
>>>> >>>>>> project uses which actually integrates a users
Travis
>>>> account into the
>>>> >>>> PR.
>>>> >>>>>> They just disabled Travis for PRs. And that's
kind of it.
>>>> >>>>>>
>>>> >>>>>> Naturally we can do this (duh) and safe the ASF a
fair
>>>> amount of
>>>> >>>>>> resources, but there are downsides:
>>>> >>>>>>
>>>> >>>>>> The discoverability of the Travis check takes a
nose-dive.
>>>> Either we
>>>> >>>>>> require every contributor to always, an every
commit, also
>>>> post a
>>>> >> Travis
>>>> >>>>>> build, or we have the reviewer sift through the
>>>> contributors account
>>>> >> to
>>>> >>>>>> find it.
>>>> >>>>>>
>>>> >>>>>> This is rather cumbersome. Additionally, it's
also not
>>>> equivalent to
>>>> >>>>>> having a PR build.
>>>> >>>>>>
>>>> >>>>>> A normal branch build takes a branch as is and
tests it. A
>>>> PR build
>>>> >>>>>> merges the branch into master, and then runs it.
(Fun fact:
>>>> This is
>>>> >> why
>>>> >>>>>> a PR without merge conflicts is not being run on
Travis.)
>>>> >>>>>>
>>>> >>>>>> And ultimately, everyone can already make use
of this
>>>> approach anyway.
>>>> >>>>>>
>>>> >>>>>> On 25/06/2019 08:02, Jark Wu wrote:
>>>> >>>>>>> Hi Jeff,
>>>> >>>>>>>
>>>> >>>>>>> Thanks for sharing the Zeppelin approach. I
think it's a
>>>> good idea to
>>>> >>>>>>> leverage user's travis account.
>>>> >>>>>>> In this way, we can have almost unlimited
concurrent build
>>>> jobs and
>>>> >>>>>>> developers can restart build by themselves
(currently only
>>>> committers
>>>> >>>>>>> can restart PR's build).
>>>> >>>>>>>
>>>> >>>>>>> But I'm still not very clear how to integrate
user's
>>>> travis build
>>>> >> into
>>>> >>>>>>> the Flink pull request's build automatically.
Can you
>>>> explain more in
>>>> >>>>>>> detail?
>>>> >>>>>>>
>>>> >>>>>>> Another question: does travis only build
branches for user
>>>> account?
>>>> >>>>>>> My concern is that builds for PRs will rebase
user's
>>>> commits against
>>>> >>>>>>> current master branch.
>>>> >>>>>>> This will help us to find problems before
merge. Builds
>>>> for branches
>>>> >>>>>>> will lose the impact of new commits in master.
>>>> >>>>>>> How does Zeppelin solve this problem?
>>>> >>>>>>>
>>>> >>>>>>> Thanks again for sharing the idea.
>>>> >>>>>>>
>>>> >>>>>>> Regards,
>>>> >>>>>>> Jark
>>>> >>>>>>>
>>>> >>>>>>> On Tue, 25 Jun 2019 at 11:01, Jeff Zhang
<zjf...@gmail.com <mailto:zjf...@gmail.com>
>>>> <mailto:zjf...@gmail.com <mailto:zjf...@gmail.com>>
>>>> >>>>>>> <mailto:zjf...@gmail.com
<mailto:zjf...@gmail.com> <mailto:zjf...@gmail.com
<mailto:zjf...@gmail.com>>>> wrote:
>>>> >>>>>>>
>>>> >>>>>>> Hi Folks,
>>>> >>>>>>>
>>>> >>>>>>> Zeppelin meet this kind of issue before, we
solve
>>>> it by
>>>> >> delegating
>>>> >>>>>>> each
>>>> >>>>>>> one's PR build to his travis account
(Everyone can
>>>> have 5 free
>>>> >>>>>>> slot for
>>>> >>>>>>> travis build).
>>>> >>>>>>> Apache account travis build is only triggered
when
>>>> PR is merged.
>>>> >>>>>>>
>>>> >>>>>>>
>>>> >>>>>>>
>>>> >>>>>>> Kurt Young <ykt...@gmail.com
<mailto:ykt...@gmail.com>
>>>> <mailto:ykt...@gmail.com <mailto:ykt...@gmail.com>>
<mailto:ykt...@gmail.com <mailto:ykt...@gmail.com>
>>>> <mailto:ykt...@gmail.com <mailto:ykt...@gmail.com>>>>
>>>> >>>>>>> 于2019年6月25日周二 上午10:16写道：
>>>> >>>>>>>
>>>> >>>>>>> > (Forgot to cc George)
>>>> >>>>>>> >
>>>> >>>>>>> > Best,
>>>> >>>>>>> > Kurt
>>>> >>>>>>> >
>>>> >>>>>>> >
>>>> >>>>>>> > On Tue, Jun 25, 2019 at 10:16 AM Kurt Young
>>>> <ykt...@gmail.com <mailto:ykt...@gmail.com>
<mailto:ykt...@gmail.com <mailto:ykt...@gmail.com>>
>>>> >>>>>>> <mailto:ykt...@gmail.com
<mailto:ykt...@gmail.com> <mailto:ykt...@gmail.com
<mailto:ykt...@gmail.com>>>>
>>>> wrote:
>>>> >>>>>>> >
>>>> >>>>>>> > > Hi Bowen,
>>>> >>>>>>> > >
>>>> >>>>>>> > > Thanks for bringing this up. We
actually have
>>>> discussed
>>>> >> about
>>>> >>>>>>> this, and I
>>>> >>>>>>> > > think Till and George have
>>>> >>>>>>> > > already spend sometime investigating
it. I have
>>>> cced both of
>>>> >>>>>>> them, and
>>>> >>>>>>> > > maybe they can share
>>>> >>>>>>> > > their findings.
>>>> >>>>>>> > >
>>>> >>>>>>> > > Best,
>>>> >>>>>>> > > Kurt
>>>> >>>>>>> > >
>>>> >>>>>>> > >
>>>> >>>>>>> > > On Tue, Jun 25, 2019 at 10:08 AM Jark Wu
>>>> <imj...@gmail.com <mailto:imj...@gmail.com>
<mailto:imj...@gmail.com <mailto:imj...@gmail.com>>
>>>> >>>>>>> <mailto:imj...@gmail.com
<mailto:imj...@gmail.com> <mailto:imj...@gmail.com
<mailto:imj...@gmail.com>>>>
>>>> wrote:
>>>> >>>>>>> > >
>>>> >>>>>>> > >> Hi Bowen,
>>>> >>>>>>> > >>
>>>> >>>>>>> > >> Thanks for bringing this. We also
suffered from
>>>> the long
>>>> >>>>>>> build time.
>>>> >>>>>>> > >> I agree that we should focus on
solving build
>>>> capacity
>>>> >>>>>>> problem in the
>>>> >>>>>>> > >> thread.
>>>> >>>>>>> > >>
>>>> >>>>>>> > >> My observation is there is only one
build is
>>>> running, all
>>>> >> the
>>>> >>>>>>> others
>>>> >>>>>>> > >> (other
>>>> >>>>>>> > >> PRs, master) are pending.
>>>> >>>>>>> > >> The pricing plan[1] of travis shows
it can
>>>> support
>>>> >> concurrent
>>>> >>>>>>> build
>>>> >>>>>>> > jobs.
>>>> >>>>>>> > >> But I don't know which plan we are
using, might
>>>> be the free
>>>> >>>>>>> plan for
>>>> >>>>>>> > open
>>>> >>>>>>> > >> source.
>>>> >>>>>>> > >>
>>>> >>>>>>> > >> I cc-ed Chesnay who may have some
experience on
>>>> Travis.
>>>> >>>>>>> > >>
>>>> >>>>>>> > >> Regards,
>>>> >>>>>>> > >> Jark
>>>> >>>>>>> > >>
>>>> >>>>>>> > >> [1]: https://travis-ci.com/plans
>>>> >>>>>>> > >>
>>>> >>>>>>> > >> On Tue, 25 Jun 2019 at 08:11, Bowen Li <
>>>> >> bowenl...@gmail.com <mailto:bowenl...@gmail.com>
<mailto:bowenl...@gmail.com <mailto:bowenl...@gmail.com>>
>>>> >>>>>>> <mailto:bowenl...@gmail.com
<mailto:bowenl...@gmail.com>
>>>> <mailto:bowenl...@gmail.com
<mailto:bowenl...@gmail.com>>>> wrote:
>>>> >>>>>>> > >>
>>>> >>>>>>> > >> > Hi Steven,
>>>> >>>>>>> > >> >
>>>> >>>>>>> > >> > I think you may not read what I
wrote. The
>>>> discussion is
>>>> >>>> about
>>>> >>>>>>> > "unstable
>>>> >>>>>>> > >> > build **capacity**", in another word
>>>> "unstable / lack of
>>>> >>>> build
>>>> >>>>>>> > >> resources",
>>>> >>>>>>> > >> > not "unstable build".
>>>> >>>>>>> > >> >
>>>> >>>>>>> > >> > On Mon, Jun 24, 2019 at 4:40 PM
Steven Wu
>>>> >>>>>>> <stevenz...@gmail.com
<mailto:stevenz...@gmail.com> <mailto:stevenz...@gmail.com
<mailto:stevenz...@gmail.com>>
>>>> <mailto:stevenz...@gmail.com
<mailto:stevenz...@gmail.com> <mailto:stevenz...@gmail.com
<mailto:stevenz...@gmail.com>>>>
>>>> >>>>>>> > wrote:
>>>> >>>>>>> > >> >
>>>> >>>>>>> > >> > > long and sometimes unstable build is
>>>> definitely a pain
>>>> >>>>>> point.
>>>> >>>>>>> > >> > >
>>>> >>>>>>> > >> > > I suspect the build failure here in
>>>> >> flink-connector-kafka
>>>> >>>>>>> is not
>>>> >>>>>>> > >> related
>>>> >>>>>>> > >> > to
>>>> >>>>>>> > >> > > my change. but there is no easy
re-run the
>>>> build on
>>>> >>>>>>> travis UI.
>>>> >>>>>>> > Google
>>>> >>>>>>> > >> > > search showed a trick of
close-and-open the
>>>> PR will
>>>> >>>>>>> trigger rebuild.
>>>> >>>>>>> > >> but
>>>> >>>>>>> > >> > > that could add noises to the PR
activities.
>>>> >>>>>>> > >> > >
>>>> https://travis-ci.org/apache/flink/jobs/545555519
>>>> >>>>>>> > >> > >
>>>> >>>>>>> > >> > > travis-ci for my personal repo
often failed
>>>> with
>>>> >>>>>>> exceeding time
>>>> >>>>>>> > limit
>>>> >>>>>>> > >> > after
>>>> >>>>>>> > >> > > 4+ hours.
>>>> >>>>>>> > >> > > The job exceeded the maximum time
limit for
>>>> jobs, and
>>>> >> has
>>>> >>>>>>> been
>>>> >>>>>>> > >> > terminated.
>>>> >>>>>>> > >> > >
>>>> >>>>>>> > >> > > On Mon, Jun 24, 2019 at 4:15 PM
Bowen Li
>>>> >>>>>>> <bowenl...@gmail.com
<mailto:bowenl...@gmail.com> <mailto:bowenl...@gmail.com
<mailto:bowenl...@gmail.com>>
>>>> <mailto:bowenl...@gmail.com <mailto:bowenl...@gmail.com>
<mailto:bowenl...@gmail.com <mailto:bowenl...@gmail.com>>>>
>>>> >>>>>>> > wrote:
>>>> >>>>>>> > >> > >
>>>> >>>>>>> > >> > > >
>>>> https://travis-ci.org/apache/flink/builds/549681530
>>>> >>>>>>> This build
>>>> >>>>>>> > >> > request
>>>> >>>>>>> > >> > > > has
>>>> >>>>>>> > >> > > > been sitting at **HEAD of the
queue**
>>>> since I first
>>>> >> saw
>>>> >>>>>>> it at PST
>>>> >>>>>>> > >> > 10:30am
>>>> >>>>>>> > >> > > > (not sure how long it's been
there before
>>>> 10:30am).
>>>> >>>>>>> It's PST
>>>> >>>>>>> > 4:12pm
>>>> >>>>>>> > >> now
>>>> >>>>>>> > >> > > and
>>>> >>>>>>> > >> > > > it hasn't started yet.
>>>> >>>>>>> > >> > > >
>>>> >>>>>>> > >> > > > On Mon, Jun 24, 2019 at 2:48 PM
Bowen Li
>>>> >>>>>>> <bowenl...@gmail.com
<mailto:bowenl...@gmail.com> <mailto:bowenl...@gmail.com
<mailto:bowenl...@gmail.com>>
>>>> <mailto:bowenl...@gmail.com <mailto:bowenl...@gmail.com>
<mailto:bowenl...@gmail.com <mailto:bowenl...@gmail.com>>>>
>>>> >>>>>>> > >> wrote:
>>>> >>>>>>> > >> > > >
>>>> >>>>>>> > >> > > > > Hi devs,
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > > > I've been experiencing the pain
>>>> resulting from lack
>>>> >>>>>>> of stable
>>>> >>>>>>> > >> build
>>>> >>>>>>> > >> > > > > capacity on Travis for Flink
PRs [1].
>>>> >> Specifically, I
>>>> >>>>>>> noticed
>>>> >>>>>>> > >> often
>>>> >>>>>>> > >> > > that
>>>> >>>>>>> > >> > > > no
>>>> >>>>>>> > >> > > > > build in the queue is making any
>>>> progress for
>>>> >> hours,
>>>> >>>> and
>>>> >>>>>>> > suddenly
>>>> >>>>>>> > >> 5
>>>> >>>>>>> > >> > or
>>>> >>>>>>> > >> > > 6
>>>> >>>>>>> > >> > > > > builds kick off all together
after the
>>>> long pause.
>>>> >>>>>>> I'm at PST
>>>> >>>>>>> > >> > (UTC-08)
>>>> >>>>>>> > >> > > > time
>>>> >>>>>>> > >> > > > > zone, and I've seen pause can
be as
>>>> long as 6 hours
>>>> >>>>>>> from PST 9am
>>>> >>>>>>> > >> to
>>>> >>>>>>> > >> > 3pm
>>>> >>>>>>> > >> > > > > (let alone the time needed to
drain the
>>>> queue
>>>> >>>>>>> afterwards).
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > > > I think this has greatly
impacted our
>>>> productivity.
>>>> >>>> I've
>>>> >>>>>>> > >> experienced
>>>> >>>>>>> > >> > > that
>>>> >>>>>>> > >> > > > > PRs submitted in the early
morning of
>>>> PST time zone
>>>> >>>>>>> won't finish
>>>> >>>>>>> > >> > their
>>>> >>>>>>> > >> > > > > build until late night of the
same day.
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > > > So my questions are:
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > > > - Has anyone else experienced
the same
>>>> problem or
>>>> >>>>>>> have similar
>>>> >>>>>>> > >> > > > observation
>>>> >>>>>>> > >> > > > > on TravisCI? (I suspect it
has things
>>>> to do with
>>>> >> time
>>>> >>>>>>> zone)
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > > > - What pricing plan of
TravisCI is
>>>> Flink currently
>>>> >>>>>>> using? Is it
>>>> >>>>>>> > >> the
>>>> >>>>>>> > >> > > free
>>>> >>>>>>> > >> > > > > plan for open source
projects? What
>>>> are the
>>>> >>>>>>> guaranteed build
>>>> >>>>>>> > >> capacity
>>>> >>>>>>> > >> > > of
>>>> >>>>>>> > >> > > > > the current plan?
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > > > - If the current pricing plan
(either
>>>> free or paid)
>>>> >>>>>> can't
>>>> >>>>>>> > provide
>>>> >>>>>>> > >> > > stable
>>>> >>>>>>> > >> > > > > build capacity, can we
upgrade to a
>>>> higher priced
>>>> >>>>>>> plan with
>>>> >>>>>>> > larger
>>>> >>>>>>> > >> > and
>>>> >>>>>>> > >> > > > more
>>>> >>>>>>> > >> > > > > stable build capacity?
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > > > BTW, another factor that
contribute to
>>>> the
>>>> >>>>>>> productivity problem
>>>> >>>>>>> > is
>>>> >>>>>>> > >> > that
>>>> >>>>>>> > >> > > > > our build is slow - we run
full build
>>>> for every PR
>>>> >>>> and a
>>>> >>>>>>> > >> successful
>>>> >>>>>>> > >> > > full
>>>> >>>>>>> > >> > > > > build takes ~5h. We
definitely have
>>>> more options to
>>>> >>>>>>> solve it,
>>>> >>>>>>> > for
>>>> >>>>>>> > >> > > > instance,
>>>> >>>>>>> > >> > > > > modularize the build graphs
and reuse
>>>> artifacts
>>>> >> from
>>>> >>>> the
>>>> >>>>>>> > previous
>>>> >>>>>>> > >> > > build.
>>>> >>>>>>> > >> > > > > But I think that can be a big
effort
>>>> which is much
>>>> >>>>>>> harder to
>>>> >>>>>>> > >> > accomplish
>>>> >>>>>>> > >> > > > in
>>>> >>>>>>> > >> > > > > a short period of time and
may deserve
>>>> its own
>>>> >>>> separate
>>>> >>>>>>> > >> discussion.
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > > > [1]
>>>> >> https://travis-ci.org/apache/flink/pull_requests
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > > >
>>>> >>>>>>> > >> > > >
>>>> >>>>>>> > >> > >
>>>> >>>>>>> > >> >
>>>> >>>>>>> > >>
>>>> >>>>>>> > >
>>>> >>>>>>> >
>>>> >>>>>>>
>>>> >>>>>>>
>>>> >>>>>>> --
>>>> >>>>>>> Best Regards
>>>> >>>>>>>
>>>> >>>>>>> Jeff Zhang
>>>> >>>>>>>
>>>> >>
>>>>
>>>
>>
