Also, regarding the "Each PR should be backed by a JIRA" rule - please
don't make this strict and consider the relative effort to opening a JIRA
as opposed to just opening a PR for small PRs that fix something obvious.

For example, two days ago I opened two PRs while investigating a reported
JIRA bug (FLINK-2858 <https://issues.apache.org/jira/browse/FLINK-2858>):

https://github.com/apache/flink/pull/1259
https://github.com/apache/flink/pull/1260

1259 removes obsolete references to the (now removed 'flink-spargel' code
from the POM), while 1260 updates a paragraph of the "How to Build"
documentation and fixes some broken href anchors.

Just my two cents here, but fixes (not only hotfixes) that

* resolve minor and obvious issues with the existing code or the
documentation,
* can be followed by everybody just by looking at the diff

should be just cherry-picked (and if needed amended) by a committer without
too much unnecessary discussion and excluded from the "shepherding process".


2015-10-17 12:32 GMT+02:00 Alexander Alexandrov <
alexander.s.alexand...@gmail.com>:

> One suggestion from me: in GitHub you can make clear who the current
> sheppard is through the "Assignee" field in the PR (which can and IMHO
> should be different from the user who actually opened the request).
>
> Regards,
> A.
>
> 2015-10-16 15:58 GMT+02:00 Fabian Hueske <fhue...@gmail.com>:
>
>> Hi folks,
>>
>> I think we can split of the discussion of a PR meeting.
>>
>> Are there any more comments on the proposal itself?
>> Otherwise, I would go ahead and put the described process (modulo the
>> comments) into a document for our website.
>>
>> Cheers, Fabian
>>
>> 2015-10-07 16:57 GMT+02:00 Fabian Hueske <fhue...@gmail.com>:
>>
>> > I like the idea of meeting once a week to discuss about PRs as well.
>> >
>> > Regarding lingering PRs, you can simply sort the Flink PRs in Github by
>> > "least recently updated"
>> >
>> > Cheers,
>> > Fabian
>> >
>> > 2015-10-07 16:48 GMT+02:00 Theodore Vasiloudis <
>> > theodoros.vasilou...@gmail.com>:
>> >
>> >> >
>> >> > Could we maybe do a "PR overall status assessment" once per week or
>> so,
>> >> > where we find those problematic PRs and try to assign them / close
>> them?
>> >>
>> >>
>> >> I like this idea, as it would raise  awareness about lingering PRs.
>> Does
>> >> anybody know if there is
>> >> some way to integrate this into JIRA, so we can easily see (and
>> >> filter/sort) lingering PRs?
>> >>
>> >> Cheers,
>> >> Theo
>> >>
>> >> On Wed, Oct 7, 2015 at 12:04 PM, Vasiliki Kalavri <
>> >> vasilikikala...@gmail.com
>> >> > wrote:
>> >>
>> >> > Hey,
>> >> >
>> >> > I agree that we need to organize the PR process. A PR management tool
>> >> would
>> >> > be great.
>> >> >
>> >> > However, it seems to me that the shepherding process described is
>> -more
>> >> or
>> >> > less- what we've already been doing. There is usually a person that
>> >> reviews
>> >> > the PR and kind-of drives the process. Maybe making this explicit
>> will
>> >> make
>> >> > things go faster.
>> >> >
>> >> > There is a problem I see here, quite related to what Theo also
>> >> mentioned.
>> >> > For how long do we let a PR lingering around without a shepherd? What
>> >> do we
>> >> > do if nobody volunteers?
>> >> > Could we maybe do a "PR overall status assessment" once per week or
>> so,
>> >> > where we find those problematic PRs and try to assign them / close
>> them?
>> >> >
>> >> > Finally, I think shepherding one's own PR is a bad idea (the review
>> >> part)
>> >> > unless it's something trivial.
>> >> >
>> >> > Cheers and see you very soon,
>> >> > -Vasia.
>> >> > On Oct 7, 2015 11:24 AM, "Matthias J. Sax" <mj...@apache.org> wrote:
>> >> >
>> >> > > Ok. That makes sense. So most people will need to change behavior
>> and
>> >> > > start discussions in JIRA and not over dev list. Furthermore,
>> issues
>> >> > > list must be monitored more carefully... (I personally, watch dev
>> >> > > carefully and only skip over issues list right now)
>> >> > >
>> >> > > -Matthias
>> >> > >
>> >> > > On 10/07/2015 10:22 AM, Fabian Hueske wrote:
>> >> > > > @Matthias: That's a good point. Each PR should be backed by a
>> JIRA
>> >> > issue.
>> >> > > > If that's not the case, we have to make the contributor aware of
>> >> that
>> >> > > rule.
>> >> > > > I'll update the process to keep all discussions in JIRA (will be
>> >> > mirrored
>> >> > > > to issues ML), OK?
>> >> > > >
>> >> > > > @Theo: You are right. Adding this process won't be the silver
>> >> bullet to
>> >> > > fix
>> >> > > > all PR related issues.
>> >> > > > But I hope it will help to improve the overall situation.
>> >> > > >
>> >> > > > Are there any other comment? Otherwise I would start to prepare
>> add
>> >> > this
>> >> > > to
>> >> > > > our website.
>> >> > > >
>> >> > > > Thanks, Fabian
>> >> > > >
>> >> > > > 2015-10-06 9:46 GMT+02:00 Theodore Vasiloudis <
>> >> > > > theodoros.vasilou...@gmail.com>:
>> >> > > >
>> >> > > >> One problem that we are seeing with FlinkML PRs is that there
>> are
>> >> > simply
>> >> > > >> not enough commiters to "shepherd" all of them.
>> >> > > >>
>> >> > > >> While I think this process would help generally, I don't think
>> it
>> >> > would
>> >> > > >> solve this kind of problem.
>> >> > > >>
>> >> > > >> Regards,
>> >> > > >> Theodore
>> >> > > >>
>> >> > > >> On Mon, Oct 5, 2015 at 3:28 PM, Matthias J. Sax <
>> mj...@apache.org>
>> >> > > wrote:
>> >> > > >>
>> >> > > >>> One comment:
>> >> > > >>> We should ensure that contributors follow discussions on the
>> dev
>> >> > > mailing
>> >> > > >>> list. Otherwise, they might miss important discussions
>> regarding
>> >> > their
>> >> > > >>> PR (what happened already). Thus, the contributor was waiting
>> for
>> >> > > >>> feedback on the PR, while the reviewer(s) waited for the PR to
>> be
>> >> > > >>> updated according to the discussion consensus, resulting in
>> >> > unnecessary
>> >> > > >>> delays.
>> >> > > >>>
>> >> > > >>> -Matthias
>> >> > > >>>
>> >> > > >>>
>> >> > > >>>
>> >> > > >>> On 10/05/2015 02:18 PM, Fabian Hueske wrote:
>> >> > > >>>> Hi everybody,
>> >> > > >>>>
>> >> > > >>>> Along with our efforts to improve the “How to contribute”
>> guide,
>> >> I
>> >> > > >> would
>> >> > > >>>> like to start a discussion about a setting up a review process
>> >> for
>> >> > > pull
>> >> > > >>>> requests.
>> >> > > >>>>
>> >> > > >>>> Right now, I feel that our PR review efforts are often a bit
>> >> > > >> unorganized.
>> >> > > >>>> This leads to situation such as:
>> >> > > >>>>
>> >> > > >>>> - PRs which are lingering around without review or feedback
>> >> > > >>>> - PRs which got a +1 for merging but which did not get merged
>> >> > > >>>> - PRs which have been rejected after a long time
>> >> > > >>>> - PRs which became irrelevant because some component was
>> >> rewritten
>> >> > > >>>> - PRs which are lingering around and have been abandoned by
>> their
>> >> > > >>>> contributors
>> >> > > >>>>
>> >> > > >>>> To address these issues I propose to define a pull request
>> review
>> >> > > >> process
>> >> > > >>>> as follows:
>> >> > > >>>>
>> >> > > >>>> 1. [Get a Shepherd] Each pull request is taken care of by a
>> >> > shepherd.
>> >> > > >>>> Shepherds are committers that voluntarily sign up and *feel
>> >> > > >> responsible*
>> >> > > >>>> for helping the PR through the process until it is merged (or
>> >> > > >> discarded).
>> >> > > >>>> The shepherd is also the person to contact for the author of
>> the
>> >> > PR. A
>> >> > > >>>> committer becomes the shepherd of a PR by dropping a comment
>> on
>> >> > Github
>> >> > > >>> like
>> >> > > >>>> “I would like to shepherd this PR”. A PR can be reassigned
>> with
>> >> lazy
>> >> > > >>>> consensus.
>> >> > > >>>>
>> >> > > >>>> 2. [Accept Decision] The first decision for a PR should be
>> >> whether
>> >> > it
>> >> > > >> is
>> >> > > >>>> accepted or not. This depends on a) whether it is a desired
>> >> feature
>> >> > or
>> >> > > >>>> improvement for Flink and b) whether the higher-level solution
>> >> > design
>> >> > > >> is
>> >> > > >>>> appropriate. In many cases such as bug fixes or discussed
>> >> features
>> >> > or
>> >> > > >>>> improvements, this should be an easy decision. In case of
>> more a
>> >> > > >> complex
>> >> > > >>>> feature, the discussion should have been started when the
>> >> mandatory
>> >> > > >> JIRA
>> >> > > >>>> was created. If it is still not clear whether the PR should be
>> >> > > accepted
>> >> > > >>> or
>> >> > > >>>> not, a discussion should be started in JIRA (a JIRA issue
>> needs
>> >> to
>> >> > be
>> >> > > >>>> created if none exists). The acceptance decision should be
>> >> recorded
>> >> > by
>> >> > > >> a
>> >> > > >>>> “+1 to accept” message in Github. If the PR is not accepted,
>> it
>> >> > should
>> >> > > >> be
>> >> > > >>>> closed in a timely manner.
>> >> > > >>>>
>> >> > > >>>> 3. [Merge Decision] Once a PR has been “accepted”, it should
>> be
>> >> > > brought
>> >> > > >>>> into a mergeable state. This means the community should
>> quickly
>> >> > react
>> >> > > >> on
>> >> > > >>>> contributor questions or PR updates. Everybody is encouraged
>> to
>> >> > review
>> >> > > >>> pull
>> >> > > >>>> requests and give feedback. Ideally, the PR author does not
>> have
>> >> to
>> >> > > >> wait
>> >> > > >>>> for a long time to get feedback. The shepherd of a PR should
>> feel
>> >> > > >>>> responsible to drive this process forward. Once the PR is
>> >> considered
>> >> > > to
>> >> > > >>> be
>> >> > > >>>> mergeable, this should be recorded by a “+1 to merge” message
>> in
>> >> > > >> Github.
>> >> > > >>> If
>> >> > > >>>> the pull request becomes abandoned at some point in time, it
>> >> should
>> >> > be
>> >> > > >>>> either taken over by somebody else or be closed after a
>> >> reasonable
>> >> > > >> time.
>> >> > > >>>> Again, this can be done by anybody, but the shepherd should
>> feel
>> >> > > >>>> responsible to resolve the issue.
>> >> > > >>>>
>> >> > > >>>> 4. Once, the PR is in a mergeable state, it should be merged.
>> >> This
>> >> > can
>> >> > > >> be
>> >> > > >>>> done by anybody, however the shepherd should make sure that it
>> >> > happens
>> >> > > >>> in a
>> >> > > >>>> timely manner.
>> >> > > >>>>
>> >> > > >>>> IMPORTANT: Everybody is encouraged to discuss pull requests,
>> give
>> >> > > >>> feedback,
>> >> > > >>>> and merge pull requests which are in a good shape. However,
>> the
>> >> > > >> shepherd
>> >> > > >>>> should feel responsible to drive a PR forward if nothing
>> happens.
>> >> > > >>>>
>> >> > > >>>> By defining a review process for pull requests, I hope we can
>> >> > > >>>>
>> >> > > >>>> - Improve the satisfaction of and interaction with
>> contributors
>> >> > > >>>> - Improve and speed-up the review process of pull requests.
>> >> > > >>>> - Close irrelevant and stale PRs more timely
>> >> > > >>>> - Reduce the effort for code reviewing
>> >> > > >>>>
>> >> > > >>>> The review process can be supported by some tooling:
>> >> > > >>>>
>> >> > > >>>> - A QA bot that checks the quality of pull requests such as
>> >> increase
>> >> > > of
>> >> > > >>>> compiler warnings, code style, API changes, etc.
>> >> > > >>>> - A PR management tool such as Sparks PR dashboard (see:
>> >> > > >>>> https://spark-prs.appspot.com/)
>> >> > > >>>>
>> >> > > >>>> I would like to start discussions about using such tools
>> later as
>> >> > > >>> separate
>> >> > > >>>> discussions.
>> >> > > >>>>
>> >> > > >>>> Looking forward to your feedback,
>> >> > > >>>> Fabian
>> >> > > >>>>
>> >> > > >>>
>> >> > > >>>
>> >> > > >>
>> >> > > >
>> >> > >
>> >> > >
>> >> >
>> >>
>> >
>> >
>>
>
>

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