Extending and improving our "How to contribute" page

[Martin Liesenberg]

Hi,

GitHub just introduced a way to supply PR templates. [1]

To support the changes discussed here, we could add a simple template with
check boxes like:
[ ] did you add tests
[ ] did you check against the coding guidelines
[ ] is there a jira supporting the PR

Let me know what you think. The language/tone probably needs a bit of
refinement.

best regards
martin

[1] https://github.com/blog/2111-issue-and-pull-request-templates

Till Rohrmann <[hidden email]> schrieb am Do., 15. Okt. 2015 um
11:58 Uhr:

> Thanks for leading the effort Fabian!
>
> On Fri, Oct 9, 2015 at 10:07 AM, Maximilian Michels <[hidden email]>
> wrote:
>
> > Very nice work, Fabian. I think we'll have to send around a reminder
> > from time to time and, perhaps, evaluate the new guidelines after some
> > period of time. It's great to have these documents now as a reference.
> >
> > On Thu, Oct 8, 2015 at 5:36 PM, Stephan Ewen <[hidden email]> wrote:
> > > Great, thanks Fabian!
> > >
> > > On Thu, Oct 8, 2015 at 5:28 PM, Henry Saputra <[hidden email]
> >
> > > wrote:
> > >
> > >> Thanks again for leading this effort, Fabian
> > >>
> > >> - Henry
> > >>
> > >> On Thursday, October 8, 2015, Fabian Hueske <[hidden email]>
> wrote:
> > >>
> > >> > Hi everybody,
> > >> >
> > >> > I merged our new contribution guidelines a few minutes ago.
> > >> >
> > >> > I'd like to emphasize that these rules do not have any effect, if
> > nobody
> > >> > follows them.
> > >> > So please follow our contribution rules and make others aware of
> them
> > as
> > >> > well.
> > >> >
> > >> > Specifically
> > >> > - pay attention that all PRs are backed by a JIRA and ask to create
> a
> > >> JIRA
> > >> > if that is not the case
> > >> > - early discuss whether a feature request is valid (before code is
> > >> > contributed) to avoid frustrating late rejections of PRs.
> > >> > - request, provide, and discuss design docs for sensible
> > contributions to
> > >> > avoid major redesigns / rejections of PRs.
> > >> >
> > >> > Thank you,
> > >> > Fabian
> > >> >
> > >> > 2015-10-07 10:16 GMT+02:00 Fabian Hueske <[hidden email]
> > >> <javascript:;>
> > >> > >:
> > >> >
> > >> > > Thanks for the feedback everybody.
> > >> > > I updated the PR and would like to merge it later today if there
> > are no
> > >> > > more comments.
> > >> > >
> > >> > > Cheers, Fabian
> > >> > >
> > >> > >
> > >> > > 2015-10-05 14:09 GMT+02:00 Fabian Hueske <[hidden email]
> > >> > <javascript:;>>:
> > >> > >
> > >> > >> Hi,
> > >> > >>
> > >> > >> I opened a PR with the discussed changes [1].
> > >> > >> Please review, give feedback, and suggest changes.
> > >> > >>
> > >> > >> Cheers, Fabian
> > >> > >>
> > >> > >> [1] https://github.com/apache/flink-web/pull/11
> > >> > >>
> > >> > >>
> > >> > >> 2015-09-28 18:02 GMT+02:00 Fabian Hueske <[hidden email]
> > >> > <javascript:;>>:
> > >> > >>
> > >> > >>> @Chiwan, sure. Will do that. Thanks for pointing it out :-)
> > >> > >>>
> > >> > >>> 2015-09-28 18:00 GMT+02:00 Chiwan Park <[hidden email]
> > >> > <javascript:;>>:
> > >> > >>>
> > >> > >>>> @Fabian, Could you cover FLINK-2712 in your pull request? I
> think
> > >> that
> > >> > >>>> it would be better than split pull request.
> > >> > >>>>
> > >> > >>>> Regards,
> > >> > >>>> Chiwan Park
> > >> > >>>>
> > >> > >>>> > On Sep 28, 2015, at 4:51 PM, Fabian Hueske <
> [hidden email]
> > >> > <javascript:;>> wrote:
> > >> > >>>> >
> > >> > >>>> > Thanks everybody for the discussion.
> > >> > >>>> > I'll prepare a pull request to update the "How to contribute"
> > and
> > >> > >>>> "Coding
> > >> > >>>> > Guidelines".
> > >> > >>>> >
> > >> > >>>> > Thanks,
> > >> > >>>> > Fabian
> > >> > >>>> >
> > >> > >>>> > 2015-09-26 9:06 GMT+02:00 Maximilian Michels <[hidden email]
> > >> > <javascript:;>>:
> > >> > >>>> >
> > >> > >>>> >> Hi Fabian,
> > >> > >>>> >>
> > >> > >>>> >> This is a very important topic. Thanks for starting the
> > >> discussion.
> > >> > >>>> >>
> > >> > >>>> >> 1) JIRA discussion
> > >> > >>>> >>
> > >> > >>>> >> Absolutely. No new feature should be introduced without a
> > >> > discussion.
> > >> > >>>> >> Frankly, I see the problem that sometimes discussions only
> > come
> > >> up
> > >> > >>>> >> when the pull request has been opened. However, this can be
> > >> > overcome
> > >> > >>>> >> by the design document.
> > >> > >>>> >>
> > >> > >>>> >> 2) Design document
> > >> > >>>> >>
> > >> > >>>> >> +1 for the document. It increases transparency but also
> helps
> > the
> > >> > >>>> >> contributor to think his idea through before starting to
> code.
> > >> The
> > >> > >>>> >> document could also be written directly in JIRA. That way,
> it
> > is
> > >> > more
> > >> > >>>> >> accessible. JIRA offers mark up; even images can be attached
> > and
> > >> > >>>> >> displayed in the JIRA description.
> > >> > >>>> >>
> > >> > >>>> >> I'd like to propose another section "Limitations" for the
> > design
> > >> > >>>> >> document. Breaking API changes should also be listed on a
> > special
> > >> > >>>> Wiki
> > >> > >>>> >> page.
> > >> > >>>> >>
> > >> > >>>> >> 3) Coding style
> > >> > >>>> >>
> > >> > >>>> >> In addition to updating the document, do we want to enforce
> > >> coding
> > >> > >>>> >> styles also by adding new Maven Checkstyle rules? IMHO
> strict
> > >> rules
> > >> > >>>> >> could cause more annoyances than they actually contribute to
> > the
> > >> > >>>> >> readability of the code. Perhaps this should be discussed
> in a
> > >> > >>>> >> separate thread.
> > >> > >>>> >>
> > >> > >>>> >> +1 for collecting common problems and design patterns to
> > include
> > >> > them
> > >> > >>>> >> in the document. I was thinking, that we should also cover
> > some
> > >> of
> > >> > >>>> the
> > >> > >>>> >> features of tools and dependencies we heavily use, e.g.
> > Travis,
> > >> > >>>> >> Mockito, Guava, Log4j, FlinkMiniCluster, Unit testing vs IT
> > >> cases,
> > >> > >>>> >> etc.
> > >> > >>>> >>
> > >> > >>>> >> 4 ) Restructuring the how to contribute guide
> > >> > >>>> >>
> > >> > >>>> >> Good idea to have a meta document that explains how
> > contributing
> > >> > >>>> works
> > >> > >>>> >> in general, and another document for technical things.
> > >> > >>>> >>
> > >> > >>>> >>
> > >> > >>>> >> Cheers,
> > >> > >>>> >> Max
> > >> > >>>> >>
> > >> > >>>> >>
> > >> > >>>> >> On Thu, Sep 24, 2015 at 2:53 PM, Fabian Hueske <
> > >> [hidden email]
> > >> > <javascript:;>>
> > >> > >>>> wrote:
> > >> > >>>> >>>
> > >> > >>>> >>> Thanks everybody for feedback and comments.
> > >> > >>>> >>>
> > >> > >>>> >>> Regarding 1) and 2):
> > >> > >>>> >>>
> > >> > >>>> >>> I like the idea of keeping the discussion of new features
> and
> > >> > >>>> >> improvements
> > >> > >>>> >>> in JIRA as Kostas proposed.
> > >> > >>>> >>> Our coding guidelines [1] already request a JIRA issue for
> > each
> > >> > pull
> > >> > >>>> >>> request.
> > >> > >>>> >>>
> > >> > >>>> >>> How about we highlight this requirement more prominently
> and
> > >> > follow
> > >> > >>>> this
> > >> > >>>> >>> rule more strict from now on.
> > >> > >>>> >>> JIRA issues for new features and improvements should
> clearly
> > >> > >>>> specify the
> > >> > >>>> >>> scope and requirements for the new feature / improvement.
> > >> > >>>> >>> The level of detail is up to the reporter of the issue, but
> > the
> > >> > >>>> community
> > >> > >>>> >>> can request more detail or change the scope and
> requirements
> > by
> > >> > >>>> >> discussion.
> > >> > >>>> >>> When a JIRA issue for a new feature or improvement is
> opened,
> > >> the
> > >> > >>>> >> community
> > >> > >>>> >>> can start a discussion whether the feature is desirable for
> > >> Flink
> > >> > >>>> or not.
> > >> > >>>> >>> Any contributor (including the reporter) can also attach a
> > >> > >>>> >>> "design-doc-requested" label to the issue. A design
> document
> > can
> > >> > be
> > >> > >>>> >>> proposed by anybody, including the reporter or assignee of
> > the
> > >> > JIRA
> > >> > >>>> >> issue.
> > >> > >>>> >>> However, the issue cannot be resolved and a corresponding
> PR
> > not
> > >> > be
> > >> > >>>> >> merged
> > >> > >>>> >>> before a design document has been accepted by lazy
> consensus.
> > >> > >>>> Hence, an
> > >> > >>>> >>> assignee should propose a design doc before starting to
> code
> > to
> > >> > >>>> avoid
> > >> > >>>> >> major
> > >> > >>>> >>> redesigns of the implementation.
> > >> > >>>> >>>
> > >> > >>>> >>> This way it is up to the community when to start a
> discussion
> > >> > about
> > >> > >>>> >> whether
> > >> > >>>> >>> a feature request is accepted or to request a design
> > document.
> > >> We
> > >> > >>>> can
> > >> > >>>> >> make
> > >> > >>>> >>> design documents mandatory for changes that touch the
> public
> > >> API.
> > >> > >>>> >>>
> > >> > >>>> >>> Regarding 3):
> > >> > >>>> >>>
> > >> > >>>> >>> I agree with Vasia, that we should collect suggestions for
> > >> common
> > >> > >>>> >> patterns
> > >> > >>>> >>> and also continuously update the coding guidelines.
> > >> > >>>> >>> @Henry, I had best practices (exception handling, tests,
> > etc.)
> > >> in
> > >> > >>>> mind.
> > >> > >>>> >>> Syntactic code style is important as well, but we should
> > have a
> > >> > >>>> separate
> > >> > >>>> >>> discussion about that, IMO.
> > >> > >>>> >>>
> > >> > >>>> >>> Proposal for a design document template:
> > >> > >>>> >>>
> > >> > >>>> >>> - Overview of general approach
> > >> > >>>> >>> - API changes (changed interfaces, new / deprecated
> > >> configuration
> > >> > >>>> >>> parameters, changed behavior)
> > >> > >>>> >>> - Main components and classes to touch
> > >> > >>>> >>>
> > >> > >>>> >>> Cheers,
> > >> > >>>> >>> Fabian
> > >> > >>>> >>>
> > >> > >>>> >>> [1] http://flink.apache.org/coding-guidelines.html
> > >> > >>>> >>> <http://flink.apache.org/coding-guidelines.html>
> > >> > >>>> >>>
> > >> > >>>> >>> 2015-09-24 10:52 GMT+02:00 Chiwan Park <
> > [hidden email]
> > >> > <javascript:;>>:
> > >> > >>>> >>>
> > >> > >>>> >>>> Thanks Fabian for starting the discussion.
> > >> > >>>> >>>>
> > >> > >>>> >>>> +1 for overall approach.
> > >> > >>>> >>>>
> > >> > >>>> >>>> About (1), expressing that consensus must be required for
> > new
> > >> > >>>> feature
> > >> > >>>> >> in
> > >> > >>>> >>>> “How to contribute” page is very nice. Some pull requests
> > were
> > >> > sent
> > >> > >>>> >> without
> > >> > >>>> >>>> consensus. The contributors had to rewrote their pull
> > requests.
> > >> > >>>> >>>>
> > >> > >>>> >>>> Agree with (2), (3) and (4).
> > >> > >>>> >>>>
> > >> > >>>> >>>> Regards,
> > >> > >>>> >>>> Chiwan Park
> > >> > >>>> >>>>
> > >> > >>>> >>>>> On Sep 24, 2015, at 2:23 AM, Henry Saputra <
> > >> > >>>> [hidden email] <javascript:;>>
> > >> > >>>> >>>> wrote:
> > >> > >>>> >>>>>
> > >> > >>>> >>>>> Thanks again, Fabian for starting the discussions.
> > >> > >>>> >>>>>
> > >> > >>>> >>>>> For (1) and (2) I think it is good idea and will help
> > people
> > >> to
> > >> > >>>> >>>>> understand and follow the author thought process.
> > >> > >>>> >>>>> Following up with Stephan's reply, some new features
> > solutions
> > >> > >>>> could
> > >> > >>>> >>>>> be explained thoroughly in the PR descriptions but some
> > >> requires
> > >> > >>>> >>>>> additional reviews of the proposed design.
> > >> > >>>> >>>>> I like the idea of using tag in JIRA whether new features
> > >> should
> > >> > >>>> or
> > >> > >>>> >>>>> should not being accompanied by design document.
> > >> > >>>> >>>>>
> > >> > >>>> >>>>> Agree with (3) and (4).
> > >> > >>>> >>>>> As for (3) are you thinking about more of style of code
> > syntax
> > >> > via
> > >> > >>>> >>>>> checkstyle updates, or best practices in term of no
> mutable
> > >> > state
> > >> > >>>> if
> > >> > >>>> >>>>> possible, throw precise Exception if possible for
> > interfaces,
> > >> > >>>> etc. ?
> > >> > >>>> >>>>>
> > >> > >>>> >>>>> - Henry
> > >> > >>>> >>>>>
> > >> > >>>> >>>>>
> > >> > >>>> >>>>>
> > >> > >>>> >>>>>
> > >> > >>>> >>>>> On Wed, Sep 23, 2015 at 9:31 AM, Stephan Ewen <
> > >> [hidden email]
> > >> > <javascript:;>>
> > >> > >>>> >> wrote:
> > >> > >>>> >>>>>> Thanks, Fabian for driving this!
> > >> > >>>> >>>>>>
> > >> > >>>> >>>>>> I agree with your points.
> > >> > >>>> >>>>>>
> > >> > >>>> >>>>>> Concerning Vasia's comment to not raise the bar too
> high:
> > >> > >>>> >>>>>> That is true, the requirements should be reasonable. We
> > can
> > >> > >>>> >> definitely
> > >> > >>>> >>>> tag
> > >> > >>>> >>>>>> issues as "simple" which means they do not require a
> > design
> > >> > >>>> >> document.
> > >> > >>>> >>>> That
> > >> > >>>> >>>>>> should be more for new features and needs not be very
> > >> detailed.
> > >> > >>>> >>>>>>
> > >> > >>>> >>>>>> We could also make the inverse, meaning we explicitly
> tag
> > >> > certain
> > >> > >>>> >>>> issues as
> > >> > >>>> >>>>>> "requires design document".
> > >> > >>>> >>>>>>
> > >> > >>>> >>>>>> Greetings,
> > >> > >>>> >>>>>> Stephan
> > >> > >>>> >>>>>>
> > >> > >>>> >>>>>>
> > >> > >>>> >>>>>>
> > >> > >>>> >>>>>>
> > >> > >>>> >>>>>> On Wed, Sep 23, 2015 at 5:05 PM, Vasiliki Kalavri <
> > >> > >>>> >>>> [hidden email] <javascript:;>
> > >> > >>>> >>>>>>> wrote:
> > >> > >>>> >>>>>>
> > >> > >>>> >>>>>>> Hi,
> > >> > >>>> >>>>>>>
> > >> > >>>> >>>>>>> I agree with you Fabian. Clarifying these issues in the
> > "How
> > >> > to
> > >> > >>>> >>>> Contribute"
> > >> > >>>> >>>>>>> guide will save lots of time both to reviewers and
> > >> > contributors.
> > >> > >>>> >> It is
> > >> > >>>> >>>> a
> > >> > >>>> >>>>>>> really disappointing situation when someone spends time
> > >> > >>>> >> implementing
> > >> > >>>> >>>>>>> something and their PR ends up being rejected because
> > either
> > >> > the
> > >> > >>>> >>>> feature
> > >> > >>>> >>>>>>> was not needed or the implementation details were never
> > >> agreed
> > >> > >>>> on.
> > >> > >>>> >>>>>>>
> > >> > >>>> >>>>>>> That said, I think we should also make sure that we
> don't
> > >> > raise
> > >> > >>>> the
> > >> > >>>> >>>> bar too
> > >> > >>>> >>>>>>> high for simple contributions.
> > >> > >>>> >>>>>>>
> > >> > >>>> >>>>>>> Regarding (1) and (2), I think we should clarify what
> > kind
> > >> of
> > >> > >>>> >>>>>>> additions/changes require this process to be followed.
> > e.g.
> > >> do
> > >> > >>>> we
> > >> > >>>> >> need
> > >> > >>>> >>>> to
> > >> > >>>> >>>>>>> discuss additions for which JIRAs already exist? Ideas
> > >> > described
> > >> > >>>> >> in the
> > >> > >>>> >>>>>>> roadmaps? Adding a new algorithm to Gelly/Flink-ML?
> > >> > >>>> >>>>>>>
> > >> > >>>> >>>>>>> Regarding (3), maybe we can all suggest some
> > >> examples/patterns
> > >> > >>>> that
> > >> > >>>> >>>> we've
> > >> > >>>> >>>>>>> seen when reviewing PRs and then choose the most common
> > (or
> > >> > >>>> all).
> > >> > >>>> >>>>>>>
> > >> > >>>> >>>>>>> (4) sounds good to me.
> > >> > >>>> >>>>>>>
> > >> > >>>> >>>>>>> Cheers,
> > >> > >>>> >>>>>>> Vasia.
> > >> > >>>> >>>>>>>
> > >> > >>>> >>>>>>> On 23 September 2015 at 15:08, Kostas Tzoumas <
> > >> > >>>> [hidden email] <javascript:;>
> > >> > >>>> >>>
> > >> > >>>> >>>> wrote:
> > >> > >>>> >>>>>>>
> > >> > >>>> >>>>>>>> Big +1.
> > >> > >>>> >>>>>>>>
> > >> > >>>> >>>>>>>> For (1), a discussion in JIRA would also be an option
> > IMO
> > >> > >>>> >>>>>>>>
> > >> > >>>> >>>>>>>> For (2), let us come up with few examples on what
> > >> > constitutes a
> > >> > >>>> >>>> feature
> > >> > >>>> >>>>>>>> that needs a design doc, and what should be in the doc
> > (IMO
> > >> > >>>> >>>>>>>> architecture/general approach, components touched,
> > >> interfaces
> > >> > >>>> >> changed)
> > >> > >>>> >>>>>>>>
> > >> > >>>> >>>>>>>>
> > >> > >>>> >>>>>>>>
> > >> > >>>> >>>>>>>> On Wed, Sep 23, 2015 at 2:24 PM, Fabian Hueske <
> > >> > >>>> [hidden email] <javascript:;>
> > >> > >>>> >>>
> > >> > >>>> >>>>>>> wrote:
> > >> > >>>> >>>>>>>>
> > >> > >>>> >>>>>>>>> Hi everybody,
> > >> > >>>> >>>>>>>>>
> > >> > >>>> >>>>>>>>> I guess we all have noticed that the Flink community
> is
> > >> > >>>> quickly
> > >> > >>>> >>>> growing
> > >> > >>>> >>>>>>>> and
> > >> > >>>> >>>>>>>>> more and more contributions are coming in. Recently,
> a
> > few
> > >> > >>>> >>>>>>> contributions
> > >> > >>>> >>>>>>>>> proposed new features without being discussed on the
> > >> mailing
> > >> > >>>> >> list.
> > >> > >>>> >>>> Some
> > >> > >>>> >>>>>>>> of
> > >> > >>>> >>>>>>>>> these contributions were not accepted in the end. In
> > other
> > >> > >>>> cases,
> > >> > >>>> >>>> pull
> > >> > >>>> >>>>>>>>> requests had to be heavily reworked because the
> > approach
> > >> > taken
> > >> > >>>> >> was
> > >> > >>>> >>>> not
> > >> > >>>> >>>>>>>> the
> > >> > >>>> >>>>>>>>> best one. These are situations which should be
> avoided
> > >> > because
> > >> > >>>> >> both
> > >> > >>>> >>>> the
> > >> > >>>> >>>>>>>>> contributor as well as the person who reviewed the
> > >> > >>>> contribution
> > >> > >>>> >>>>>>> invested
> > >> > >>>> >>>>>>>> a
> > >> > >>>> >>>>>>>>> lot of time for nothing.
> > >> > >>>> >>>>>>>>>
> > >> > >>>> >>>>>>>>> I had a look at our “How to contribute” and “Coding
> > >> > guideline”
> > >> > >>>> >> pages
> > >> > >>>> >>>>>>> and
> > >> > >>>> >>>>>>>>> think, we can improve them. I see basically two
> issues:
> > >> > >>>> >>>>>>>>>
> > >> > >>>> >>>>>>>>> 1. The documents do not explain how to propose and
> > discuss
> > >> > new
> > >> > >>>> >>>>>>> features
> > >> > >>>> >>>>>>>>> and improvements.
> > >> > >>>> >>>>>>>>> 2. The documents are quite technical and the
> structure
> > >> could
> > >> > >>>> be
> > >> > >>>> >>>>>>>> improved,
> > >> > >>>> >>>>>>>>> IMO.
> > >> > >>>> >>>>>>>>>
> > >> > >>>> >>>>>>>>> I would like to improve these pages and propose the
> > >> > following
> > >> > >>>> >>>>>>> additions:
> > >> > >>>> >>>>>>>>>
> > >> > >>>> >>>>>>>>> 1. Request contributors and committers to start
> > >> discussions
> > >> > on
> > >> > >>>> >> the
> > >> > >>>> >>>>>>>>> mailing list for new features. This discussion should
> > help
> > >> > to
> > >> > >>>> >> figure
> > >> > >>>> >>>>>>> out
> > >> > >>>> >>>>>>>>> whether such a new feature is a good fit for Flink
> and
> > >> give
> > >> > >>>> first
> > >> > >>>> >>>>>>>> pointers
> > >> > >>>> >>>>>>>>> for a design to implement it.
> > >> > >>>> >>>>>>>>> 2. Require contributors and committers to write
> design
> > >> > >>>> >> documents for
> > >> > >>>> >>>>>>>> all
> > >> > >>>> >>>>>>>>> new features and major improvements. These documents
> > >> should
> > >> > be
> > >> > >>>> >>>> attached
> > >> > >>>> >>>>>>>> to
> > >> > >>>> >>>>>>>>> a JIRA issue and follow a template which needs to be
> > >> > defined.
> > >> > >>>> >>>>>>>>> 3. Extend the “Coding Style Guides” and add patterns
> > that
> > >> > are
> > >> > >>>> >>>>>>> commonly
> > >> > >>>> >>>>>>>>> remarked in pull requests.
> > >> > >>>> >>>>>>>>> 4. Restructure the current pages into three pages: a
> > >> general
> > >> > >>>> >> guide
> > >> > >>>> >>>>>>> for
> > >> > >>>> >>>>>>>>> contributions and two guides for how to contribute to
> > code
> > >> > and
> > >> > >>>> >>>> website
> > >> > >>>> >>>>>>>> with
> > >> > >>>> >>>>>>>>> all technical issues (repository, IDE setup, build
> > system,
> > >> > >>>> etc.)
> > >> > >>>> >>>>>>>>>
> > >> > >>>> >>>>>>>>> Looking forward for your comments,
> > >> > >>>> >>>>>>>>> Fabian
> > >> > >>>> >>>>>>>>>
> > >> > >>>> >>>>>>>>
> > >> > >>>> >>>>>>>
> > >> > >>>> >>>>
> > >> > >>>> >>>>
> > >> > >>>> >>>>
> > >> > >>>> >>>>
> > >> > >>>> >>>>
> > >> > >>>> >>>>
> > >> > >>>> >>
> > >> > >>>>
> > >> > >>>>
> > >> > >>>>
> > >> > >>>>
> > >> > >>>>
> > >> > >>>>
> > >> > >>>
> > >> > >>
> > >> > >
> > >> >
> > >>
> >
>

[mxm]

Hi Martin,

Sounds like a good idea to me to create a checklist like this. It
would be a nice reminder for people who didn't read the
how-to-contribute section of the README :)

Cheers,
Max

On Thu, Feb 18, 2016 at 9:31 AM, Martin Liesenberg
<[hidden email]> wrote:

> Hi,
>
> GitHub just introduced a way to supply PR templates. [1]
>
> To support the changes discussed here, we could add a simple template with
> check boxes like:
> [ ] did you add tests
> [ ] did you check against the coding guidelines
> [ ] is there a jira supporting the PR
>
> Let me know what you think. The language/tone probably needs a bit of
> refinement.
>
> best regards
> martin
>
> [1] https://github.com/blog/2111-issue-and-pull-request-templates
>
> Till Rohrmann <[hidden email]> schrieb am Do., 15. Okt. 2015 um
> 11:58 Uhr:
>
>> Thanks for leading the effort Fabian!
>>
>> On Fri, Oct 9, 2015 at 10:07 AM, Maximilian Michels <[hidden email]>
>> wrote:
>>
>> > Very nice work, Fabian. I think we'll have to send around a reminder
>> > from time to time and, perhaps, evaluate the new guidelines after some
>> > period of time. It's great to have these documents now as a reference.
>> >
>> > On Thu, Oct 8, 2015 at 5:36 PM, Stephan Ewen <[hidden email]> wrote:
>> > > Great, thanks Fabian!
>> > >
>> > > On Thu, Oct 8, 2015 at 5:28 PM, Henry Saputra <[hidden email]
>> >
>> > > wrote:
>> > >
>> > >> Thanks again for leading this effort, Fabian
>> > >>
>> > >> - Henry
>> > >>
>> > >> On Thursday, October 8, 2015, Fabian Hueske <[hidden email]>
>> wrote:
>> > >>
>> > >> > Hi everybody,
>> > >> >
>> > >> > I merged our new contribution guidelines a few minutes ago.
>> > >> >
>> > >> > I'd like to emphasize that these rules do not have any effect, if
>> > nobody
>> > >> > follows them.
>> > >> > So please follow our contribution rules and make others aware of
>> them
>> > as
>> > >> > well.
>> > >> >
>> > >> > Specifically
>> > >> > - pay attention that all PRs are backed by a JIRA and ask to create
>> a
>> > >> JIRA
>> > >> > if that is not the case
>> > >> > - early discuss whether a feature request is valid (before code is
>> > >> > contributed) to avoid frustrating late rejections of PRs.
>> > >> > - request, provide, and discuss design docs for sensible
>> > contributions to
>> > >> > avoid major redesigns / rejections of PRs.
>> > >> >
>> > >> > Thank you,
>> > >> > Fabian
>> > >> >
>> > >> > 2015-10-07 10:16 GMT+02:00 Fabian Hueske <[hidden email]
>> > >> <javascript:;>
>> > >> > >:
>> > >> >
>> > >> > > Thanks for the feedback everybody.
>> > >> > > I updated the PR and would like to merge it later today if there
>> > are no
>> > >> > > more comments.
>> > >> > >
>> > >> > > Cheers, Fabian
>> > >> > >
>> > >> > >
>> > >> > > 2015-10-05 14:09 GMT+02:00 Fabian Hueske <[hidden email]
>> > >> > <javascript:;>>:
>> > >> > >
>> > >> > >> Hi,
>> > >> > >>
>> > >> > >> I opened a PR with the discussed changes [1].
>> > >> > >> Please review, give feedback, and suggest changes.
>> > >> > >>
>> > >> > >> Cheers, Fabian
>> > >> > >>
>> > >> > >> [1] https://github.com/apache/flink-web/pull/11
>> > >> > >>
>> > >> > >>
>> > >> > >> 2015-09-28 18:02 GMT+02:00 Fabian Hueske <[hidden email]
>> > >> > <javascript:;>>:
>> > >> > >>
>> > >> > >>> @Chiwan, sure. Will do that. Thanks for pointing it out :-)
>> > >> > >>>
>> > >> > >>> 2015-09-28 18:00 GMT+02:00 Chiwan Park <[hidden email]
>> > >> > <javascript:;>>:
>> > >> > >>>
>> > >> > >>>> @Fabian, Could you cover FLINK-2712 in your pull request? I
>> think
>> > >> that
>> > >> > >>>> it would be better than split pull request.
>> > >> > >>>>
>> > >> > >>>> Regards,
>> > >> > >>>> Chiwan Park
>> > >> > >>>>
>> > >> > >>>> > On Sep 28, 2015, at 4:51 PM, Fabian Hueske <
>> [hidden email]
>> > >> > <javascript:;>> wrote:
>> > >> > >>>> >
>> > >> > >>>> > Thanks everybody for the discussion.
>> > >> > >>>> > I'll prepare a pull request to update the "How to contribute"
>> > and
>> > >> > >>>> "Coding
>> > >> > >>>> > Guidelines".
>> > >> > >>>> >
>> > >> > >>>> > Thanks,
>> > >> > >>>> > Fabian
>> > >> > >>>> >
>> > >> > >>>> > 2015-09-26 9:06 GMT+02:00 Maximilian Michels <[hidden email]
>> > >> > <javascript:;>>:
>> > >> > >>>> >
>> > >> > >>>> >> Hi Fabian,
>> > >> > >>>> >>
>> > >> > >>>> >> This is a very important topic. Thanks for starting the
>> > >> discussion.
>> > >> > >>>> >>
>> > >> > >>>> >> 1) JIRA discussion
>> > >> > >>>> >>
>> > >> > >>>> >> Absolutely. No new feature should be introduced without a
>> > >> > discussion.
>> > >> > >>>> >> Frankly, I see the problem that sometimes discussions only
>> > come
>> > >> up
>> > >> > >>>> >> when the pull request has been opened. However, this can be
>> > >> > overcome
>> > >> > >>>> >> by the design document.
>> > >> > >>>> >>
>> > >> > >>>> >> 2) Design document
>> > >> > >>>> >>
>> > >> > >>>> >> +1 for the document. It increases transparency but also
>> helps
>> > the
>> > >> > >>>> >> contributor to think his idea through before starting to
>> code.
>> > >> The
>> > >> > >>>> >> document could also be written directly in JIRA. That way,
>> it
>> > is
>> > >> > more
>> > >> > >>>> >> accessible. JIRA offers mark up; even images can be attached
>> > and
>> > >> > >>>> >> displayed in the JIRA description.
>> > >> > >>>> >>
>> > >> > >>>> >> I'd like to propose another section "Limitations" for the
>> > design
>> > >> > >>>> >> document. Breaking API changes should also be listed on a
>> > special
>> > >> > >>>> Wiki
>> > >> > >>>> >> page.
>> > >> > >>>> >>
>> > >> > >>>> >> 3) Coding style
>> > >> > >>>> >>
>> > >> > >>>> >> In addition to updating the document, do we want to enforce
>> > >> coding
>> > >> > >>>> >> styles also by adding new Maven Checkstyle rules? IMHO
>> strict
>> > >> rules
>> > >> > >>>> >> could cause more annoyances than they actually contribute to
>> > the
>> > >> > >>>> >> readability of the code. Perhaps this should be discussed
>> in a
>> > >> > >>>> >> separate thread.
>> > >> > >>>> >>
>> > >> > >>>> >> +1 for collecting common problems and design patterns to
>> > include
>> > >> > them
>> > >> > >>>> >> in the document. I was thinking, that we should also cover
>> > some
>> > >> of
>> > >> > >>>> the
>> > >> > >>>> >> features of tools and dependencies we heavily use, e.g.
>> > Travis,
>> > >> > >>>> >> Mockito, Guava, Log4j, FlinkMiniCluster, Unit testing vs IT
>> > >> cases,
>> > >> > >>>> >> etc.
>> > >> > >>>> >>
>> > >> > >>>> >> 4 ) Restructuring the how to contribute guide
>> > >> > >>>> >>
>> > >> > >>>> >> Good idea to have a meta document that explains how
>> > contributing
>> > >> > >>>> works
>> > >> > >>>> >> in general, and another document for technical things.
>> > >> > >>>> >>
>> > >> > >>>> >>
>> > >> > >>>> >> Cheers,
>> > >> > >>>> >> Max
>> > >> > >>>> >>
>> > >> > >>>> >>
>> > >> > >>>> >> On Thu, Sep 24, 2015 at 2:53 PM, Fabian Hueske <
>> > >> [hidden email]
>> > >> > <javascript:;>>
>> > >> > >>>> wrote:
>> > >> > >>>> >>>
>> > >> > >>>> >>> Thanks everybody for feedback and comments.
>> > >> > >>>> >>>
>> > >> > >>>> >>> Regarding 1) and 2):
>> > >> > >>>> >>>
>> > >> > >>>> >>> I like the idea of keeping the discussion of new features
>> and
>> > >> > >>>> >> improvements
>> > >> > >>>> >>> in JIRA as Kostas proposed.
>> > >> > >>>> >>> Our coding guidelines [1] already request a JIRA issue for
>> > each
>> > >> > pull
>> > >> > >>>> >>> request.
>> > >> > >>>> >>>
>> > >> > >>>> >>> How about we highlight this requirement more prominently
>> and
>> > >> > follow
>> > >> > >>>> this
>> > >> > >>>> >>> rule more strict from now on.
>> > >> > >>>> >>> JIRA issues for new features and improvements should
>> clearly
>> > >> > >>>> specify the
>> > >> > >>>> >>> scope and requirements for the new feature / improvement.
>> > >> > >>>> >>> The level of detail is up to the reporter of the issue, but
>> > the
>> > >> > >>>> community
>> > >> > >>>> >>> can request more detail or change the scope and
>> requirements
>> > by
>> > >> > >>>> >> discussion.
>> > >> > >>>> >>> When a JIRA issue for a new feature or improvement is
>> opened,
>> > >> the
>> > >> > >>>> >> community
>> > >> > >>>> >>> can start a discussion whether the feature is desirable for
>> > >> Flink
>> > >> > >>>> or not.
>> > >> > >>>> >>> Any contributor (including the reporter) can also attach a
>> > >> > >>>> >>> "design-doc-requested" label to the issue. A design
>> document
>> > can
>> > >> > be
>> > >> > >>>> >>> proposed by anybody, including the reporter or assignee of
>> > the
>> > >> > JIRA
>> > >> > >>>> >> issue.
>> > >> > >>>> >>> However, the issue cannot be resolved and a corresponding
>> PR
>> > not
>> > >> > be
>> > >> > >>>> >> merged
>> > >> > >>>> >>> before a design document has been accepted by lazy
>> consensus.
>> > >> > >>>> Hence, an
>> > >> > >>>> >>> assignee should propose a design doc before starting to
>> code
>> > to
>> > >> > >>>> avoid
>> > >> > >>>> >> major
>> > >> > >>>> >>> redesigns of the implementation.
>> > >> > >>>> >>>
>> > >> > >>>> >>> This way it is up to the community when to start a
>> discussion
>> > >> > about
>> > >> > >>>> >> whether
>> > >> > >>>> >>> a feature request is accepted or to request a design
>> > document.
>> > >> We
>> > >> > >>>> can
>> > >> > >>>> >> make
>> > >> > >>>> >>> design documents mandatory for changes that touch the
>> public
>> > >> API.
>> > >> > >>>> >>>
>> > >> > >>>> >>> Regarding 3):
>> > >> > >>>> >>>
>> > >> > >>>> >>> I agree with Vasia, that we should collect suggestions for
>> > >> common
>> > >> > >>>> >> patterns
>> > >> > >>>> >>> and also continuously update the coding guidelines.
>> > >> > >>>> >>> @Henry, I had best practices (exception handling, tests,
>> > etc.)
>> > >> in
>> > >> > >>>> mind.
>> > >> > >>>> >>> Syntactic code style is important as well, but we should
>> > have a
>> > >> > >>>> separate
>> > >> > >>>> >>> discussion about that, IMO.
>> > >> > >>>> >>>
>> > >> > >>>> >>> Proposal for a design document template:
>> > >> > >>>> >>>
>> > >> > >>>> >>> - Overview of general approach
>> > >> > >>>> >>> - API changes (changed interfaces, new / deprecated
>> > >> configuration
>> > >> > >>>> >>> parameters, changed behavior)
>> > >> > >>>> >>> - Main components and classes to touch
>> > >> > >>>> >>>
>> > >> > >>>> >>> Cheers,
>> > >> > >>>> >>> Fabian
>> > >> > >>>> >>>
>> > >> > >>>> >>> [1] http://flink.apache.org/coding-guidelines.html
>> > >> > >>>> >>> <http://flink.apache.org/coding-guidelines.html>
>> > >> > >>>> >>>
>> > >> > >>>> >>> 2015-09-24 10:52 GMT+02:00 Chiwan Park <
>> > [hidden email]
>> > >> > <javascript:;>>:
>> > >> > >>>> >>>
>> > >> > >>>> >>>> Thanks Fabian for starting the discussion.
>> > >> > >>>> >>>>
>> > >> > >>>> >>>> +1 for overall approach.
>> > >> > >>>> >>>>
>> > >> > >>>> >>>> About (1), expressing that consensus must be required for
>> > new
>> > >> > >>>> feature
>> > >> > >>>> >> in
>> > >> > >>>> >>>> “How to contribute” page is very nice. Some pull requests
>> > were
>> > >> > sent
>> > >> > >>>> >> without
>> > >> > >>>> >>>> consensus. The contributors had to rewrote their pull
>> > requests.
>> > >> > >>>> >>>>
>> > >> > >>>> >>>> Agree with (2), (3) and (4).
>> > >> > >>>> >>>>
>> > >> > >>>> >>>> Regards,
>> > >> > >>>> >>>> Chiwan Park
>> > >> > >>>> >>>>
>> > >> > >>>> >>>>> On Sep 24, 2015, at 2:23 AM, Henry Saputra <
>> > >> > >>>> [hidden email] <javascript:;>>
>> > >> > >>>> >>>> wrote:
>> > >> > >>>> >>>>>
>> > >> > >>>> >>>>> Thanks again, Fabian for starting the discussions.
>> > >> > >>>> >>>>>
>> > >> > >>>> >>>>> For (1) and (2) I think it is good idea and will help
>> > people
>> > >> to
>> > >> > >>>> >>>>> understand and follow the author thought process.
>> > >> > >>>> >>>>> Following up with Stephan's reply, some new features
>> > solutions
>> > >> > >>>> could
>> > >> > >>>> >>>>> be explained thoroughly in the PR descriptions but some
>> > >> requires
>> > >> > >>>> >>>>> additional reviews of the proposed design.
>> > >> > >>>> >>>>> I like the idea of using tag in JIRA whether new features
>> > >> should
>> > >> > >>>> or
>> > >> > >>>> >>>>> should not being accompanied by design document.
>> > >> > >>>> >>>>>
>> > >> > >>>> >>>>> Agree with (3) and (4).
>> > >> > >>>> >>>>> As for (3) are you thinking about more of style of code
>> > syntax
>> > >> > via
>> > >> > >>>> >>>>> checkstyle updates, or best practices in term of no
>> mutable
>> > >> > state
>> > >> > >>>> if
>> > >> > >>>> >>>>> possible, throw precise Exception if possible for
>> > interfaces,
>> > >> > >>>> etc. ?
>> > >> > >>>> >>>>>
>> > >> > >>>> >>>>> - Henry
>> > >> > >>>> >>>>>
>> > >> > >>>> >>>>>
>> > >> > >>>> >>>>>
>> > >> > >>>> >>>>>
>> > >> > >>>> >>>>> On Wed, Sep 23, 2015 at 9:31 AM, Stephan Ewen <
>> > >> [hidden email]
>> > >> > <javascript:;>>
>> > >> > >>>> >> wrote:
>> > >> > >>>> >>>>>> Thanks, Fabian for driving this!
>> > >> > >>>> >>>>>>
>> > >> > >>>> >>>>>> I agree with your points.
>> > >> > >>>> >>>>>>
>> > >> > >>>> >>>>>> Concerning Vasia's comment to not raise the bar too
>> high:
>> > >> > >>>> >>>>>> That is true, the requirements should be reasonable. We
>> > can
>> > >> > >>>> >> definitely
>> > >> > >>>> >>>> tag
>> > >> > >>>> >>>>>> issues as "simple" which means they do not require a
>> > design
>> > >> > >>>> >> document.
>> > >> > >>>> >>>> That
>> > >> > >>>> >>>>>> should be more for new features and needs not be very
>> > >> detailed.
>> > >> > >>>> >>>>>>
>> > >> > >>>> >>>>>> We could also make the inverse, meaning we explicitly
>> tag
>> > >> > certain
>> > >> > >>>> >>>> issues as
>> > >> > >>>> >>>>>> "requires design document".
>> > >> > >>>> >>>>>>
>> > >> > >>>> >>>>>> Greetings,
>> > >> > >>>> >>>>>> Stephan
>> > >> > >>>> >>>>>>
>> > >> > >>>> >>>>>>
>> > >> > >>>> >>>>>>
>> > >> > >>>> >>>>>>
>> > >> > >>>> >>>>>> On Wed, Sep 23, 2015 at 5:05 PM, Vasiliki Kalavri <
>> > >> > >>>> >>>> [hidden email] <javascript:;>
>> > >> > >>>> >>>>>>> wrote:
>> > >> > >>>> >>>>>>
>> > >> > >>>> >>>>>>> Hi,
>> > >> > >>>> >>>>>>>
>> > >> > >>>> >>>>>>> I agree with you Fabian. Clarifying these issues in the
>> > "How
>> > >> > to
>> > >> > >>>> >>>> Contribute"
>> > >> > >>>> >>>>>>> guide will save lots of time both to reviewers and
>> > >> > contributors.
>> > >> > >>>> >> It is
>> > >> > >>>> >>>> a
>> > >> > >>>> >>>>>>> really disappointing situation when someone spends time
>> > >> > >>>> >> implementing
>> > >> > >>>> >>>>>>> something and their PR ends up being rejected because
>> > either
>> > >> > the
>> > >> > >>>> >>>> feature
>> > >> > >>>> >>>>>>> was not needed or the implementation details were never
>> > >> agreed
>> > >> > >>>> on.
>> > >> > >>>> >>>>>>>
>> > >> > >>>> >>>>>>> That said, I think we should also make sure that we
>> don't
>> > >> > raise
>> > >> > >>>> the
>> > >> > >>>> >>>> bar too
>> > >> > >>>> >>>>>>> high for simple contributions.
>> > >> > >>>> >>>>>>>
>> > >> > >>>> >>>>>>> Regarding (1) and (2), I think we should clarify what
>> > kind
>> > >> of
>> > >> > >>>> >>>>>>> additions/changes require this process to be followed.
>> > e.g.
>> > >> do
>> > >> > >>>> we
>> > >> > >>>> >> need
>> > >> > >>>> >>>> to
>> > >> > >>>> >>>>>>> discuss additions for which JIRAs already exist? Ideas
>> > >> > described
>> > >> > >>>> >> in the
>> > >> > >>>> >>>>>>> roadmaps? Adding a new algorithm to Gelly/Flink-ML?
>> > >> > >>>> >>>>>>>
>> > >> > >>>> >>>>>>> Regarding (3), maybe we can all suggest some
>> > >> examples/patterns
>> > >> > >>>> that
>> > >> > >>>> >>>> we've
>> > >> > >>>> >>>>>>> seen when reviewing PRs and then choose the most common
>> > (or
>> > >> > >>>> all).
>> > >> > >>>> >>>>>>>
>> > >> > >>>> >>>>>>> (4) sounds good to me.
>> > >> > >>>> >>>>>>>
>> > >> > >>>> >>>>>>> Cheers,
>> > >> > >>>> >>>>>>> Vasia.
>> > >> > >>>> >>>>>>>
>> > >> > >>>> >>>>>>> On 23 September 2015 at 15:08, Kostas Tzoumas <
>> > >> > >>>> [hidden email] <javascript:;>
>> > >> > >>>> >>>
>> > >> > >>>> >>>> wrote:
>> > >> > >>>> >>>>>>>
>> > >> > >>>> >>>>>>>> Big +1.
>> > >> > >>>> >>>>>>>>
>> > >> > >>>> >>>>>>>> For (1), a discussion in JIRA would also be an option
>> > IMO
>> > >> > >>>> >>>>>>>>
>> > >> > >>>> >>>>>>>> For (2), let us come up with few examples on what
>> > >> > constitutes a
>> > >> > >>>> >>>> feature
>> > >> > >>>> >>>>>>>> that needs a design doc, and what should be in the doc
>> > (IMO
>> > >> > >>>> >>>>>>>> architecture/general approach, components touched,
>> > >> interfaces
>> > >> > >>>> >> changed)
>> > >> > >>>> >>>>>>>>
>> > >> > >>>> >>>>>>>>
>> > >> > >>>> >>>>>>>>
>> > >> > >>>> >>>>>>>> On Wed, Sep 23, 2015 at 2:24 PM, Fabian Hueske <
>> > >> > >>>> [hidden email] <javascript:;>
>> > >> > >>>> >>>
>> > >> > >>>> >>>>>>> wrote:
>> > >> > >>>> >>>>>>>>
>> > >> > >>>> >>>>>>>>> Hi everybody,
>> > >> > >>>> >>>>>>>>>
>> > >> > >>>> >>>>>>>>> I guess we all have noticed that the Flink community
>> is
>> > >> > >>>> quickly
>> > >> > >>>> >>>> growing
>> > >> > >>>> >>>>>>>> and
>> > >> > >>>> >>>>>>>>> more and more contributions are coming in. Recently,
>> a
>> > few
>> > >> > >>>> >>>>>>> contributions
>> > >> > >>>> >>>>>>>>> proposed new features without being discussed on the
>> > >> mailing
>> > >> > >>>> >> list.
>> > >> > >>>> >>>> Some
>> > >> > >>>> >>>>>>>> of
>> > >> > >>>> >>>>>>>>> these contributions were not accepted in the end. In
>> > other
>> > >> > >>>> cases,
>> > >> > >>>> >>>> pull
>> > >> > >>>> >>>>>>>>> requests had to be heavily reworked because the
>> > approach
>> > >> > taken
>> > >> > >>>> >> was
>> > >> > >>>> >>>> not
>> > >> > >>>> >>>>>>>> the
>> > >> > >>>> >>>>>>>>> best one. These are situations which should be
>> avoided
>> > >> > because
>> > >> > >>>> >> both
>> > >> > >>>> >>>> the
>> > >> > >>>> >>>>>>>>> contributor as well as the person who reviewed the
>> > >> > >>>> contribution
>> > >> > >>>> >>>>>>> invested
>> > >> > >>>> >>>>>>>> a
>> > >> > >>>> >>>>>>>>> lot of time for nothing.
>> > >> > >>>> >>>>>>>>>
>> > >> > >>>> >>>>>>>>> I had a look at our “How to contribute” and “Coding
>> > >> > guideline”
>> > >> > >>>> >> pages
>> > >> > >>>> >>>>>>> and
>> > >> > >>>> >>>>>>>>> think, we can improve them. I see basically two
>> issues:
>> > >> > >>>> >>>>>>>>>
>> > >> > >>>> >>>>>>>>> 1. The documents do not explain how to propose and
>> > discuss
>> > >> > new
>> > >> > >>>> >>>>>>> features
>> > >> > >>>> >>>>>>>>> and improvements.
>> > >> > >>>> >>>>>>>>> 2. The documents are quite technical and the
>> structure
>> > >> could
>> > >> > >>>> be
>> > >> > >>>> >>>>>>>> improved,
>> > >> > >>>> >>>>>>>>> IMO.
>> > >> > >>>> >>>>>>>>>
>> > >> > >>>> >>>>>>>>> I would like to improve these pages and propose the
>> > >> > following
>> > >> > >>>> >>>>>>> additions:
>> > >> > >>>> >>>>>>>>>
>> > >> > >>>> >>>>>>>>> 1. Request contributors and committers to start
>> > >> discussions
>> > >> > on
>> > >> > >>>> >> the
>> > >> > >>>> >>>>>>>>> mailing list for new features. This discussion should
>> > help
>> > >> > to
>> > >> > >>>> >> figure
>> > >> > >>>> >>>>>>> out
>> > >> > >>>> >>>>>>>>> whether such a new feature is a good fit for Flink
>> and
>> > >> give
>> > >> > >>>> first
>> > >> > >>>> >>>>>>>> pointers
>> > >> > >>>> >>>>>>>>> for a design to implement it.
>> > >> > >>>> >>>>>>>>> 2. Require contributors and committers to write
>> design
>> > >> > >>>> >> documents for
>> > >> > >>>> >>>>>>>> all
>> > >> > >>>> >>>>>>>>> new features and major improvements. These documents
>> > >> should
>> > >> > be
>> > >> > >>>> >>>> attached
>> > >> > >>>> >>>>>>>> to
>> > >> > >>>> >>>>>>>>> a JIRA issue and follow a template which needs to be
>> > >> > defined.
>> > >> > >>>> >>>>>>>>> 3. Extend the “Coding Style Guides” and add patterns
>> > that
>> > >> > are
>> > >> > >>>> >>>>>>> commonly
>> > >> > >>>> >>>>>>>>> remarked in pull requests.
>> > >> > >>>> >>>>>>>>> 4. Restructure the current pages into three pages: a
>> > >> general
>> > >> > >>>> >> guide
>> > >> > >>>> >>>>>>> for
>> > >> > >>>> >>>>>>>>> contributions and two guides for how to contribute to
>> > code
>> > >> > and
>> > >> > >>>> >>>> website
>> > >> > >>>> >>>>>>>> with
>> > >> > >>>> >>>>>>>>> all technical issues (repository, IDE setup, build
>> > system,
>> > >> > >>>> etc.)
>> > >> > >>>> >>>>>>>>>
>> > >> > >>>> >>>>>>>>> Looking forward for your comments,
>> > >> > >>>> >>>>>>>>> Fabian
>> > >> > >>>> >>>>>>>>>
>> > >> > >>>> >>>>>>>>
>> > >> > >>>> >>>>>>>
>> > >> > >>>> >>>>
>> > >> > >>>> >>>>
>> > >> > >>>> >>>>
>> > >> > >>>> >>>>
>> > >> > >>>> >>>>
>> > >> > >>>> >>>>
>> > >> > >>>> >>
>> > >> > >>>>
>> > >> > >>>>
>> > >> > >>>>
>> > >> > >>>>
>> > >> > >>>>
>> > >> > >>>>
>> > >> > >>>
>> > >> > >>
>> > >> > >
>> > >> >
>> > >>
>> >
>>

[Martin Liesenberg]

Cool, if no one objects, I'll create a JIRA ticket and open a corresponding
PR during the weekend.

Best regards
Martin

On Thu, 18 Feb 2016, 17:36 Maximilian Michels <[hidden email]> wrote:

> Hi Martin,
>
> Sounds like a good idea to me to create a checklist like this. It
> would be a nice reminder for people who didn't read the
> how-to-contribute section of the README :)
>
> Cheers,
> Max
>
> On Thu, Feb 18, 2016 at 9:31 AM, Martin Liesenberg
> <[hidden email]> wrote:
> > Hi,
> >
> > GitHub just introduced a way to supply PR templates. [1]
> >
> > To support the changes discussed here, we could add a simple template
> with
> > check boxes like:
> > [ ] did you add tests
> > [ ] did you check against the coding guidelines
> > [ ] is there a jira supporting the PR
> >
> > Let me know what you think. The language/tone probably needs a bit of
> > refinement.
> >
> > best regards
> > martin
> >
> > [1] https://github.com/blog/2111-issue-and-pull-request-templates
> >
> > Till Rohrmann <[hidden email]> schrieb am Do., 15. Okt. 2015 um
> > 11:58 Uhr:
> >
> >> Thanks for leading the effort Fabian!
> >>
> >> On Fri, Oct 9, 2015 at 10:07 AM, Maximilian Michels <[hidden email]>
> >> wrote:
> >>
> >> > Very nice work, Fabian. I think we'll have to send around a reminder
> >> > from time to time and, perhaps, evaluate the new guidelines after some
> >> > period of time. It's great to have these documents now as a reference.
> >> >
> >> > On Thu, Oct 8, 2015 at 5:36 PM, Stephan Ewen <[hidden email]>
> wrote:
> >> > > Great, thanks Fabian!
> >> > >
> >> > > On Thu, Oct 8, 2015 at 5:28 PM, Henry Saputra <
> [hidden email]
> >> >
> >> > > wrote:
> >> > >
> >> > >> Thanks again for leading this effort, Fabian
> >> > >>
> >> > >> - Henry
> >> > >>
> >> > >> On Thursday, October 8, 2015, Fabian Hueske <[hidden email]>
> >> wrote:
> >> > >>
> >> > >> > Hi everybody,
> >> > >> >
> >> > >> > I merged our new contribution guidelines a few minutes ago.
> >> > >> >
> >> > >> > I'd like to emphasize that these rules do not have any effect, if
> >> > nobody
> >> > >> > follows them.
> >> > >> > So please follow our contribution rules and make others aware of
> >> them
> >> > as
> >> > >> > well.
> >> > >> >
> >> > >> > Specifically
> >> > >> > - pay attention that all PRs are backed by a JIRA and ask to
> create
> >> a
> >> > >> JIRA
> >> > >> > if that is not the case
> >> > >> > - early discuss whether a feature request is valid (before code
> is
> >> > >> > contributed) to avoid frustrating late rejections of PRs.
> >> > >> > - request, provide, and discuss design docs for sensible
> >> > contributions to
> >> > >> > avoid major redesigns / rejections of PRs.
> >> > >> >
> >> > >> > Thank you,
> >> > >> > Fabian
> >> > >> >
> >> > >> > 2015-10-07 10:16 GMT+02:00 Fabian Hueske <[hidden email]
> >> > >> <javascript:;>
> >> > >> > >:
> >> > >> >
> >> > >> > > Thanks for the feedback everybody.
> >> > >> > > I updated the PR and would like to merge it later today if
> there
> >> > are no
> >> > >> > > more comments.
> >> > >> > >
> >> > >> > > Cheers, Fabian
> >> > >> > >
> >> > >> > >
> >> > >> > > 2015-10-05 14:09 GMT+02:00 Fabian Hueske <[hidden email]
> >> > >> > <javascript:;>>:
> >> > >> > >
> >> > >> > >> Hi,
> >> > >> > >>
> >> > >> > >> I opened a PR with the discussed changes [1].
> >> > >> > >> Please review, give feedback, and suggest changes.
> >> > >> > >>
> >> > >> > >> Cheers, Fabian
> >> > >> > >>
> >> > >> > >> [1] https://github.com/apache/flink-web/pull/11
> >> > >> > >>
> >> > >> > >>
> >> > >> > >> 2015-09-28 18:02 GMT+02:00 Fabian Hueske <[hidden email]
> >> > >> > <javascript:;>>:
> >> > >> > >>
> >> > >> > >>> @Chiwan, sure. Will do that. Thanks for pointing it out :-)
> >> > >> > >>>
> >> > >> > >>> 2015-09-28 18:00 GMT+02:00 Chiwan Park <
> [hidden email]
> >> > >> > <javascript:;>>:
> >> > >> > >>>
> >> > >> > >>>> @Fabian, Could you cover FLINK-2712 in your pull request? I
> >> think
> >> > >> that
> >> > >> > >>>> it would be better than split pull request.
> >> > >> > >>>>
> >> > >> > >>>> Regards,
> >> > >> > >>>> Chiwan Park
> >> > >> > >>>>
> >> > >> > >>>> > On Sep 28, 2015, at 4:51 PM, Fabian Hueske <
> >> [hidden email]
> >> > >> > <javascript:;>> wrote:
> >> > >> > >>>> >
> >> > >> > >>>> > Thanks everybody for the discussion.
> >> > >> > >>>> > I'll prepare a pull request to update the "How to
> contribute"
> >> > and
> >> > >> > >>>> "Coding
> >> > >> > >>>> > Guidelines".
> >> > >> > >>>> >
> >> > >> > >>>> > Thanks,
> >> > >> > >>>> > Fabian
> >> > >> > >>>> >
> >> > >> > >>>> > 2015-09-26 9:06 GMT+02:00 Maximilian Michels <
> [hidden email]
> >> > >> > <javascript:;>>:
> >> > >> > >>>> >
> >> > >> > >>>> >> Hi Fabian,
> >> > >> > >>>> >>
> >> > >> > >>>> >> This is a very important topic. Thanks for starting the
> >> > >> discussion.
> >> > >> > >>>> >>
> >> > >> > >>>> >> 1) JIRA discussion
> >> > >> > >>>> >>
> >> > >> > >>>> >> Absolutely. No new feature should be introduced without a
> >> > >> > discussion.
> >> > >> > >>>> >> Frankly, I see the problem that sometimes discussions
> only
> >> > come
> >> > >> up
> >> > >> > >>>> >> when the pull request has been opened. However, this can
> be
> >> > >> > overcome
> >> > >> > >>>> >> by the design document.
> >> > >> > >>>> >>
> >> > >> > >>>> >> 2) Design document
> >> > >> > >>>> >>
> >> > >> > >>>> >> +1 for the document. It increases transparency but also
> >> helps
> >> > the
> >> > >> > >>>> >> contributor to think his idea through before starting to
> >> code.
> >> > >> The
> >> > >> > >>>> >> document could also be written directly in JIRA. That
> way,
> >> it
> >> > is
> >> > >> > more
> >> > >> > >>>> >> accessible. JIRA offers mark up; even images can be
> attached
> >> > and
> >> > >> > >>>> >> displayed in the JIRA description.
> >> > >> > >>>> >>
> >> > >> > >>>> >> I'd like to propose another section "Limitations" for the
> >> > design
> >> > >> > >>>> >> document. Breaking API changes should also be listed on a
> >> > special
> >> > >> > >>>> Wiki
> >> > >> > >>>> >> page.
> >> > >> > >>>> >>
> >> > >> > >>>> >> 3) Coding style
> >> > >> > >>>> >>
> >> > >> > >>>> >> In addition to updating the document, do we want to
> enforce
> >> > >> coding
> >> > >> > >>>> >> styles also by adding new Maven Checkstyle rules? IMHO
> >> strict
> >> > >> rules
> >> > >> > >>>> >> could cause more annoyances than they actually
> contribute to
> >> > the
> >> > >> > >>>> >> readability of the code. Perhaps this should be discussed
> >> in a
> >> > >> > >>>> >> separate thread.
> >> > >> > >>>> >>
> >> > >> > >>>> >> +1 for collecting common problems and design patterns to
> >> > include
> >> > >> > them
> >> > >> > >>>> >> in the document. I was thinking, that we should also
> cover
> >> > some
> >> > >> of
> >> > >> > >>>> the
> >> > >> > >>>> >> features of tools and dependencies we heavily use, e.g.
> >> > Travis,
> >> > >> > >>>> >> Mockito, Guava, Log4j, FlinkMiniCluster, Unit testing vs
> IT
> >> > >> cases,
> >> > >> > >>>> >> etc.
> >> > >> > >>>> >>
> >> > >> > >>>> >> 4 ) Restructuring the how to contribute guide
> >> > >> > >>>> >>
> >> > >> > >>>> >> Good idea to have a meta document that explains how
> >> > contributing
> >> > >> > >>>> works
> >> > >> > >>>> >> in general, and another document for technical things.
> >> > >> > >>>> >>
> >> > >> > >>>> >>
> >> > >> > >>>> >> Cheers,
> >> > >> > >>>> >> Max
> >> > >> > >>>> >>
> >> > >> > >>>> >>
> >> > >> > >>>> >> On Thu, Sep 24, 2015 at 2:53 PM, Fabian Hueske <
> >> > >> [hidden email]
> >> > >> > <javascript:;>>
> >> > >> > >>>> wrote:
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> Thanks everybody for feedback and comments.
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> Regarding 1) and 2):
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> I like the idea of keeping the discussion of new
> features
> >> and
> >> > >> > >>>> >> improvements
> >> > >> > >>>> >>> in JIRA as Kostas proposed.
> >> > >> > >>>> >>> Our coding guidelines [1] already request a JIRA issue
> for
> >> > each
> >> > >> > pull
> >> > >> > >>>> >>> request.
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> How about we highlight this requirement more prominently
> >> and
> >> > >> > follow
> >> > >> > >>>> this
> >> > >> > >>>> >>> rule more strict from now on.
> >> > >> > >>>> >>> JIRA issues for new features and improvements should
> >> clearly
> >> > >> > >>>> specify the
> >> > >> > >>>> >>> scope and requirements for the new feature /
> improvement.
> >> > >> > >>>> >>> The level of detail is up to the reporter of the issue,
> but
> >> > the
> >> > >> > >>>> community
> >> > >> > >>>> >>> can request more detail or change the scope and
> >> requirements
> >> > by
> >> > >> > >>>> >> discussion.
> >> > >> > >>>> >>> When a JIRA issue for a new feature or improvement is
> >> opened,
> >> > >> the
> >> > >> > >>>> >> community
> >> > >> > >>>> >>> can start a discussion whether the feature is desirable
> for
> >> > >> Flink
> >> > >> > >>>> or not.
> >> > >> > >>>> >>> Any contributor (including the reporter) can also
> attach a
> >> > >> > >>>> >>> "design-doc-requested" label to the issue. A design
> >> document
> >> > can
> >> > >> > be
> >> > >> > >>>> >>> proposed by anybody, including the reporter or assignee
> of
> >> > the
> >> > >> > JIRA
> >> > >> > >>>> >> issue.
> >> > >> > >>>> >>> However, the issue cannot be resolved and a
> corresponding
> >> PR
> >> > not
> >> > >> > be
> >> > >> > >>>> >> merged
> >> > >> > >>>> >>> before a design document has been accepted by lazy
> >> consensus.
> >> > >> > >>>> Hence, an
> >> > >> > >>>> >>> assignee should propose a design doc before starting to
> >> code
> >> > to
> >> > >> > >>>> avoid
> >> > >> > >>>> >> major
> >> > >> > >>>> >>> redesigns of the implementation.
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> This way it is up to the community when to start a
> >> discussion
> >> > >> > about
> >> > >> > >>>> >> whether
> >> > >> > >>>> >>> a feature request is accepted or to request a design
> >> > document.
> >> > >> We
> >> > >> > >>>> can
> >> > >> > >>>> >> make
> >> > >> > >>>> >>> design documents mandatory for changes that touch the
> >> public
> >> > >> API.
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> Regarding 3):
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> I agree with Vasia, that we should collect suggestions
> for
> >> > >> common
> >> > >> > >>>> >> patterns
> >> > >> > >>>> >>> and also continuously update the coding guidelines.
> >> > >> > >>>> >>> @Henry, I had best practices (exception handling, tests,
> >> > etc.)
> >> > >> in
> >> > >> > >>>> mind.
> >> > >> > >>>> >>> Syntactic code style is important as well, but we should
> >> > have a
> >> > >> > >>>> separate
> >> > >> > >>>> >>> discussion about that, IMO.
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> Proposal for a design document template:
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> - Overview of general approach
> >> > >> > >>>> >>> - API changes (changed interfaces, new / deprecated
> >> > >> configuration
> >> > >> > >>>> >>> parameters, changed behavior)
> >> > >> > >>>> >>> - Main components and classes to touch
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> Cheers,
> >> > >> > >>>> >>> Fabian
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> [1] http://flink.apache.org/coding-guidelines.html
> >> > >> > >>>> >>> <http://flink.apache.org/coding-guidelines.html>
> >> > >> > >>>> >>>
> >> > >> > >>>> >>> 2015-09-24 10:52 GMT+02:00 Chiwan Park <
> >> > [hidden email]
> >> > >> > <javascript:;>>:
> >> > >> > >>>> >>>
> >> > >> > >>>> >>>> Thanks Fabian for starting the discussion.
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>> +1 for overall approach.
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>> About (1), expressing that consensus must be required
> for
> >> > new
> >> > >> > >>>> feature
> >> > >> > >>>> >> in
> >> > >> > >>>> >>>> “How to contribute” page is very nice. Some pull
> requests
> >> > were
> >> > >> > sent
> >> > >> > >>>> >> without
> >> > >> > >>>> >>>> consensus. The contributors had to rewrote their pull
> >> > requests.
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>> Agree with (2), (3) and (4).
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>> Regards,
> >> > >> > >>>> >>>> Chiwan Park
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>>> On Sep 24, 2015, at 2:23 AM, Henry Saputra <
> >> > >> > >>>> [hidden email] <javascript:;>>
> >> > >> > >>>> >>>> wrote:
> >> > >> > >>>> >>>>>
> >> > >> > >>>> >>>>> Thanks again, Fabian for starting the discussions.
> >> > >> > >>>> >>>>>
> >> > >> > >>>> >>>>> For (1) and (2) I think it is good idea and will help
> >> > people
> >> > >> to
> >> > >> > >>>> >>>>> understand and follow the author thought process.
> >> > >> > >>>> >>>>> Following up with Stephan's reply, some new features
> >> > solutions
> >> > >> > >>>> could
> >> > >> > >>>> >>>>> be explained thoroughly in the PR descriptions but
> some
> >> > >> requires
> >> > >> > >>>> >>>>> additional reviews of the proposed design.
> >> > >> > >>>> >>>>> I like the idea of using tag in JIRA whether new
> features
> >> > >> should
> >> > >> > >>>> or
> >> > >> > >>>> >>>>> should not being accompanied by design document.
> >> > >> > >>>> >>>>>
> >> > >> > >>>> >>>>> Agree with (3) and (4).
> >> > >> > >>>> >>>>> As for (3) are you thinking about more of style of
> code
> >> > syntax
> >> > >> > via
> >> > >> > >>>> >>>>> checkstyle updates, or best practices in term of no
> >> mutable
> >> > >> > state
> >> > >> > >>>> if
> >> > >> > >>>> >>>>> possible, throw precise Exception if possible for
> >> > interfaces,
> >> > >> > >>>> etc. ?
> >> > >> > >>>> >>>>>
> >> > >> > >>>> >>>>> - Henry
> >> > >> > >>>> >>>>>
> >> > >> > >>>> >>>>>
> >> > >> > >>>> >>>>>
> >> > >> > >>>> >>>>>
> >> > >> > >>>> >>>>> On Wed, Sep 23, 2015 at 9:31 AM, Stephan Ewen <
> >> > >> [hidden email]
> >> > >> > <javascript:;>>
> >> > >> > >>>> >> wrote:
> >> > >> > >>>> >>>>>> Thanks, Fabian for driving this!
> >> > >> > >>>> >>>>>>
> >> > >> > >>>> >>>>>> I agree with your points.
> >> > >> > >>>> >>>>>>
> >> > >> > >>>> >>>>>> Concerning Vasia's comment to not raise the bar too
> >> high:
> >> > >> > >>>> >>>>>> That is true, the requirements should be reasonable.
> We
> >> > can
> >> > >> > >>>> >> definitely
> >> > >> > >>>> >>>> tag
> >> > >> > >>>> >>>>>> issues as "simple" which means they do not require a
> >> > design
> >> > >> > >>>> >> document.
> >> > >> > >>>> >>>> That
> >> > >> > >>>> >>>>>> should be more for new features and needs not be very
> >> > >> detailed.
> >> > >> > >>>> >>>>>>
> >> > >> > >>>> >>>>>> We could also make the inverse, meaning we explicitly
> >> tag
> >> > >> > certain
> >> > >> > >>>> >>>> issues as
> >> > >> > >>>> >>>>>> "requires design document".
> >> > >> > >>>> >>>>>>
> >> > >> > >>>> >>>>>> Greetings,
> >> > >> > >>>> >>>>>> Stephan
> >> > >> > >>>> >>>>>>
> >> > >> > >>>> >>>>>>
> >> > >> > >>>> >>>>>>
> >> > >> > >>>> >>>>>>
> >> > >> > >>>> >>>>>> On Wed, Sep 23, 2015 at 5:05 PM, Vasiliki Kalavri <
> >> > >> > >>>> >>>> [hidden email] <javascript:;>
> >> > >> > >>>> >>>>>>> wrote:
> >> > >> > >>>> >>>>>>
> >> > >> > >>>> >>>>>>> Hi,
> >> > >> > >>>> >>>>>>>
> >> > >> > >>>> >>>>>>> I agree with you Fabian. Clarifying these issues in
> the
> >> > "How
> >> > >> > to
> >> > >> > >>>> >>>> Contribute"
> >> > >> > >>>> >>>>>>> guide will save lots of time both to reviewers and
> >> > >> > contributors.
> >> > >> > >>>> >> It is
> >> > >> > >>>> >>>> a
> >> > >> > >>>> >>>>>>> really disappointing situation when someone spends
> time
> >> > >> > >>>> >> implementing
> >> > >> > >>>> >>>>>>> something and their PR ends up being rejected
> because
> >> > either
> >> > >> > the
> >> > >> > >>>> >>>> feature
> >> > >> > >>>> >>>>>>> was not needed or the implementation details were
> never
> >> > >> agreed
> >> > >> > >>>> on.
> >> > >> > >>>> >>>>>>>
> >> > >> > >>>> >>>>>>> That said, I think we should also make sure that we
> >> don't
> >> > >> > raise
> >> > >> > >>>> the
> >> > >> > >>>> >>>> bar too
> >> > >> > >>>> >>>>>>> high for simple contributions.
> >> > >> > >>>> >>>>>>>
> >> > >> > >>>> >>>>>>> Regarding (1) and (2), I think we should clarify
> what
> >> > kind
> >> > >> of
> >> > >> > >>>> >>>>>>> additions/changes require this process to be
> followed.
> >> > e.g.
> >> > >> do
> >> > >> > >>>> we
> >> > >> > >>>> >> need
> >> > >> > >>>> >>>> to
> >> > >> > >>>> >>>>>>> discuss additions for which JIRAs already exist?
> Ideas
> >> > >> > described
> >> > >> > >>>> >> in the
> >> > >> > >>>> >>>>>>> roadmaps? Adding a new algorithm to Gelly/Flink-ML?
> >> > >> > >>>> >>>>>>>
> >> > >> > >>>> >>>>>>> Regarding (3), maybe we can all suggest some
> >> > >> examples/patterns
> >> > >> > >>>> that
> >> > >> > >>>> >>>> we've
> >> > >> > >>>> >>>>>>> seen when reviewing PRs and then choose the most
> common
> >> > (or
> >> > >> > >>>> all).
> >> > >> > >>>> >>>>>>>
> >> > >> > >>>> >>>>>>> (4) sounds good to me.
> >> > >> > >>>> >>>>>>>
> >> > >> > >>>> >>>>>>> Cheers,
> >> > >> > >>>> >>>>>>> Vasia.
> >> > >> > >>>> >>>>>>>
> >> > >> > >>>> >>>>>>> On 23 September 2015 at 15:08, Kostas Tzoumas <
> >> > >> > >>>> [hidden email] <javascript:;>
> >> > >> > >>>> >>>
> >> > >> > >>>> >>>> wrote:
> >> > >> > >>>> >>>>>>>
> >> > >> > >>>> >>>>>>>> Big +1.
> >> > >> > >>>> >>>>>>>>
> >> > >> > >>>> >>>>>>>> For (1), a discussion in JIRA would also be an
> option
> >> > IMO
> >> > >> > >>>> >>>>>>>>
> >> > >> > >>>> >>>>>>>> For (2), let us come up with few examples on what
> >> > >> > constitutes a
> >> > >> > >>>> >>>> feature
> >> > >> > >>>> >>>>>>>> that needs a design doc, and what should be in the
> doc
> >> > (IMO
> >> > >> > >>>> >>>>>>>> architecture/general approach, components touched,
> >> > >> interfaces
> >> > >> > >>>> >> changed)
> >> > >> > >>>> >>>>>>>>
> >> > >> > >>>> >>>>>>>>
> >> > >> > >>>> >>>>>>>>
> >> > >> > >>>> >>>>>>>> On Wed, Sep 23, 2015 at 2:24 PM, Fabian Hueske <
> >> > >> > >>>> [hidden email] <javascript:;>
> >> > >> > >>>> >>>
> >> > >> > >>>> >>>>>>> wrote:
> >> > >> > >>>> >>>>>>>>
> >> > >> > >>>> >>>>>>>>> Hi everybody,
> >> > >> > >>>> >>>>>>>>>
> >> > >> > >>>> >>>>>>>>> I guess we all have noticed that the Flink
> community
> >> is
> >> > >> > >>>> quickly
> >> > >> > >>>> >>>> growing
> >> > >> > >>>> >>>>>>>> and
> >> > >> > >>>> >>>>>>>>> more and more contributions are coming in.
> Recently,
> >> a
> >> > few
> >> > >> > >>>> >>>>>>> contributions
> >> > >> > >>>> >>>>>>>>> proposed new features without being discussed on
> the
> >> > >> mailing
> >> > >> > >>>> >> list.
> >> > >> > >>>> >>>> Some
> >> > >> > >>>> >>>>>>>> of
> >> > >> > >>>> >>>>>>>>> these contributions were not accepted in the end.
> In
> >> > other
> >> > >> > >>>> cases,
> >> > >> > >>>> >>>> pull
> >> > >> > >>>> >>>>>>>>> requests had to be heavily reworked because the
> >> > approach
> >> > >> > taken
> >> > >> > >>>> >> was
> >> > >> > >>>> >>>> not
> >> > >> > >>>> >>>>>>>> the
> >> > >> > >>>> >>>>>>>>> best one. These are situations which should be
> >> avoided
> >> > >> > because
> >> > >> > >>>> >> both
> >> > >> > >>>> >>>> the
> >> > >> > >>>> >>>>>>>>> contributor as well as the person who reviewed the
> >> > >> > >>>> contribution
> >> > >> > >>>> >>>>>>> invested
> >> > >> > >>>> >>>>>>>> a
> >> > >> > >>>> >>>>>>>>> lot of time for nothing.
> >> > >> > >>>> >>>>>>>>>
> >> > >> > >>>> >>>>>>>>> I had a look at our “How to contribute” and
> “Coding
> >> > >> > guideline”
> >> > >> > >>>> >> pages
> >> > >> > >>>> >>>>>>> and
> >> > >> > >>>> >>>>>>>>> think, we can improve them. I see basically two
> >> issues:
> >> > >> > >>>> >>>>>>>>>
> >> > >> > >>>> >>>>>>>>> 1. The documents do not explain how to propose and
> >> > discuss
> >> > >> > new
> >> > >> > >>>> >>>>>>> features
> >> > >> > >>>> >>>>>>>>> and improvements.
> >> > >> > >>>> >>>>>>>>> 2. The documents are quite technical and the
> >> structure
> >> > >> could
> >> > >> > >>>> be
> >> > >> > >>>> >>>>>>>> improved,
> >> > >> > >>>> >>>>>>>>> IMO.
> >> > >> > >>>> >>>>>>>>>
> >> > >> > >>>> >>>>>>>>> I would like to improve these pages and propose
> the
> >> > >> > following
> >> > >> > >>>> >>>>>>> additions:
> >> > >> > >>>> >>>>>>>>>
> >> > >> > >>>> >>>>>>>>> 1. Request contributors and committers to start
> >> > >> discussions
> >> > >> > on
> >> > >> > >>>> >> the
> >> > >> > >>>> >>>>>>>>> mailing list for new features. This discussion
> should
> >> > help
> >> > >> > to
> >> > >> > >>>> >> figure
> >> > >> > >>>> >>>>>>> out
> >> > >> > >>>> >>>>>>>>> whether such a new feature is a good fit for Flink
> >> and
> >> > >> give
> >> > >> > >>>> first
> >> > >> > >>>> >>>>>>>> pointers
> >> > >> > >>>> >>>>>>>>> for a design to implement it.
> >> > >> > >>>> >>>>>>>>> 2. Require contributors and committers to write
> >> design
> >> > >> > >>>> >> documents for
> >> > >> > >>>> >>>>>>>> all
> >> > >> > >>>> >>>>>>>>> new features and major improvements. These
> documents
> >> > >> should
> >> > >> > be
> >> > >> > >>>> >>>> attached
> >> > >> > >>>> >>>>>>>> to
> >> > >> > >>>> >>>>>>>>> a JIRA issue and follow a template which needs to
> be
> >> > >> > defined.
> >> > >> > >>>> >>>>>>>>> 3. Extend the “Coding Style Guides” and add
> patterns
> >> > that
> >> > >> > are
> >> > >> > >>>> >>>>>>> commonly
> >> > >> > >>>> >>>>>>>>> remarked in pull requests.
> >> > >> > >>>> >>>>>>>>> 4. Restructure the current pages into three
> pages: a
> >> > >> general
> >> > >> > >>>> >> guide
> >> > >> > >>>> >>>>>>> for
> >> > >> > >>>> >>>>>>>>> contributions and two guides for how to
> contribute to
> >> > code
> >> > >> > and
> >> > >> > >>>> >>>> website
> >> > >> > >>>> >>>>>>>> with
> >> > >> > >>>> >>>>>>>>> all technical issues (repository, IDE setup, build
> >> > system,
> >> > >> > >>>> etc.)
> >> > >> > >>>> >>>>>>>>>
> >> > >> > >>>> >>>>>>>>> Looking forward for your comments,
> >> > >> > >>>> >>>>>>>>> Fabian
> >> > >> > >>>> >>>>>>>>>
> >> > >> > >>>> >>>>>>>>
> >> > >> > >>>> >>>>>>>
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>>>
> >> > >> > >>>> >>
> >> > >> > >>>>
> >> > >> > >>>>
> >> > >> > >>>>
> >> > >> > >>>>
> >> > >> > >>>>
> >> > >> > >>>>
> >> > >> > >>>
> >> > >> > >>
> >> > >> > >
> >> > >> >
> >> > >>
> >> >
> >>
>

[Fabian Hueske-2]

Thanks Martin!

can you add two more fields?

- Builds locally (mvn clean verify)
- Documentation updated or not updates necessary

Best, Fabian

2016-02-19 9:35 GMT+01:00 Martin Liesenberg <[hidden email]>:

> Cool, if no one objects, I'll create a JIRA ticket and open a corresponding
> PR during the weekend.
>
> Best regards
> Martin
>
> On Thu, 18 Feb 2016, 17:36 Maximilian Michels <[hidden email]> wrote:
>
> > Hi Martin,
> >
> > Sounds like a good idea to me to create a checklist like this. It
> > would be a nice reminder for people who didn't read the
> > how-to-contribute section of the README :)
> >
> > Cheers,
> > Max
> >
> > On Thu, Feb 18, 2016 at 9:31 AM, Martin Liesenberg
> > <[hidden email]> wrote:
> > > Hi,
> > >
> > > GitHub just introduced a way to supply PR templates. [1]
> > >
> > > To support the changes discussed here, we could add a simple template
> > with
> > > check boxes like:
> > > [ ] did you add tests
> > > [ ] did you check against the coding guidelines
> > > [ ] is there a jira supporting the PR
> > >
> > > Let me know what you think. The language/tone probably needs a bit of
> > > refinement.
> > >
> > > best regards
> > > martin
> > >
> > > [1] https://github.com/blog/2111-issue-and-pull-request-templates
> > >
> > > Till Rohrmann <[hidden email]> schrieb am Do., 15. Okt. 2015 um
> > > 11:58 Uhr:
> > >
> > >> Thanks for leading the effort Fabian!
> > >>
> > >> On Fri, Oct 9, 2015 at 10:07 AM, Maximilian Michels <[hidden email]>
> > >> wrote:
> > >>
> > >> > Very nice work, Fabian. I think we'll have to send around a reminder
> > >> > from time to time and, perhaps, evaluate the new guidelines after
> some
> > >> > period of time. It's great to have these documents now as a
> reference.
> > >> >
> > >> > On Thu, Oct 8, 2015 at 5:36 PM, Stephan Ewen <[hidden email]>
> > wrote:
> > >> > > Great, thanks Fabian!
> > >> > >
> > >> > > On Thu, Oct 8, 2015 at 5:28 PM, Henry Saputra <
> > [hidden email]
> > >> >
> > >> > > wrote:
> > >> > >
> > >> > >> Thanks again for leading this effort, Fabian
> > >> > >>
> > >> > >> - Henry
> > >> > >>
> > >> > >> On Thursday, October 8, 2015, Fabian Hueske <[hidden email]>
> > >> wrote:
> > >> > >>
> > >> > >> > Hi everybody,
> > >> > >> >
> > >> > >> > I merged our new contribution guidelines a few minutes ago.
> > >> > >> >
> > >> > >> > I'd like to emphasize that these rules do not have any effect,
> if
> > >> > nobody
> > >> > >> > follows them.
> > >> > >> > So please follow our contribution rules and make others aware
> of
> > >> them
> > >> > as
> > >> > >> > well.
> > >> > >> >
> > >> > >> > Specifically
> > >> > >> > - pay attention that all PRs are backed by a JIRA and ask to
> > create
> > >> a
> > >> > >> JIRA
> > >> > >> > if that is not the case
> > >> > >> > - early discuss whether a feature request is valid (before code
> > is
> > >> > >> > contributed) to avoid frustrating late rejections of PRs.
> > >> > >> > - request, provide, and discuss design docs for sensible
> > >> > contributions to
> > >> > >> > avoid major redesigns / rejections of PRs.
> > >> > >> >
> > >> > >> > Thank you,
> > >> > >> > Fabian
> > >> > >> >
> > >> > >> > 2015-10-07 10:16 GMT+02:00 Fabian Hueske <[hidden email]
> > >> > >> <javascript:;>
> > >> > >> > >:
> > >> > >> >
> > >> > >> > > Thanks for the feedback everybody.
> > >> > >> > > I updated the PR and would like to merge it later today if
> > there
> > >> > are no
> > >> > >> > > more comments.
> > >> > >> > >
> > >> > >> > > Cheers, Fabian
> > >> > >> > >
> > >> > >> > >
> > >> > >> > > 2015-10-05 14:09 GMT+02:00 Fabian Hueske <[hidden email]
> > >> > >> > <javascript:;>>:
> > >> > >> > >
> > >> > >> > >> Hi,
> > >> > >> > >>
> > >> > >> > >> I opened a PR with the discussed changes [1].
> > >> > >> > >> Please review, give feedback, and suggest changes.
> > >> > >> > >>
> > >> > >> > >> Cheers, Fabian
> > >> > >> > >>
> > >> > >> > >> [1] https://github.com/apache/flink-web/pull/11
> > >> > >> > >>
> > >> > >> > >>
> > >> > >> > >> 2015-09-28 18:02 GMT+02:00 Fabian Hueske <[hidden email]
> > >> > >> > <javascript:;>>:
> > >> > >> > >>
> > >> > >> > >>> @Chiwan, sure. Will do that. Thanks for pointing it out :-)
> > >> > >> > >>>
> > >> > >> > >>> 2015-09-28 18:00 GMT+02:00 Chiwan Park <
> > [hidden email]
> > >> > >> > <javascript:;>>:
> > >> > >> > >>>
> > >> > >> > >>>> @Fabian, Could you cover FLINK-2712 in your pull request?
> I
> > >> think
> > >> > >> that
> > >> > >> > >>>> it would be better than split pull request.
> > >> > >> > >>>>
> > >> > >> > >>>> Regards,
> > >> > >> > >>>> Chiwan Park
> > >> > >> > >>>>
> > >> > >> > >>>> > On Sep 28, 2015, at 4:51 PM, Fabian Hueske <
> > >> [hidden email]
> > >> > >> > <javascript:;>> wrote:
> > >> > >> > >>>> >
> > >> > >> > >>>> > Thanks everybody for the discussion.
> > >> > >> > >>>> > I'll prepare a pull request to update the "How to
> > contribute"
> > >> > and
> > >> > >> > >>>> "Coding
> > >> > >> > >>>> > Guidelines".
> > >> > >> > >>>> >
> > >> > >> > >>>> > Thanks,
> > >> > >> > >>>> > Fabian
> > >> > >> > >>>> >
> > >> > >> > >>>> > 2015-09-26 9:06 GMT+02:00 Maximilian Michels <
> > [hidden email]
> > >> > >> > <javascript:;>>:
> > >> > >> > >>>> >
> > >> > >> > >>>> >> Hi Fabian,
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> This is a very important topic. Thanks for starting the
> > >> > >> discussion.
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> 1) JIRA discussion
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> Absolutely. No new feature should be introduced
> without a
> > >> > >> > discussion.
> > >> > >> > >>>> >> Frankly, I see the problem that sometimes discussions
> > only
> > >> > come
> > >> > >> up
> > >> > >> > >>>> >> when the pull request has been opened. However, this
> can
> > be
> > >> > >> > overcome
> > >> > >> > >>>> >> by the design document.
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> 2) Design document
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> +1 for the document. It increases transparency but also
> > >> helps
> > >> > the
> > >> > >> > >>>> >> contributor to think his idea through before starting
> to
> > >> code.
> > >> > >> The
> > >> > >> > >>>> >> document could also be written directly in JIRA. That
> > way,
> > >> it
> > >> > is
> > >> > >> > more
> > >> > >> > >>>> >> accessible. JIRA offers mark up; even images can be
> > attached
> > >> > and
> > >> > >> > >>>> >> displayed in the JIRA description.
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> I'd like to propose another section "Limitations" for
> the
> > >> > design
> > >> > >> > >>>> >> document. Breaking API changes should also be listed
> on a
> > >> > special
> > >> > >> > >>>> Wiki
> > >> > >> > >>>> >> page.
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> 3) Coding style
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> In addition to updating the document, do we want to
> > enforce
> > >> > >> coding
> > >> > >> > >>>> >> styles also by adding new Maven Checkstyle rules? IMHO
> > >> strict
> > >> > >> rules
> > >> > >> > >>>> >> could cause more annoyances than they actually
> > contribute to
> > >> > the
> > >> > >> > >>>> >> readability of the code. Perhaps this should be
> discussed
> > >> in a
> > >> > >> > >>>> >> separate thread.
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> +1 for collecting common problems and design patterns
> to
> > >> > include
> > >> > >> > them
> > >> > >> > >>>> >> in the document. I was thinking, that we should also
> > cover
> > >> > some
> > >> > >> of
> > >> > >> > >>>> the
> > >> > >> > >>>> >> features of tools and dependencies we heavily use, e.g.
> > >> > Travis,
> > >> > >> > >>>> >> Mockito, Guava, Log4j, FlinkMiniCluster, Unit testing
> vs
> > IT
> > >> > >> cases,
> > >> > >> > >>>> >> etc.
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> 4 ) Restructuring the how to contribute guide
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> Good idea to have a meta document that explains how
> > >> > contributing
> > >> > >> > >>>> works
> > >> > >> > >>>> >> in general, and another document for technical things.
> > >> > >> > >>>> >>
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> Cheers,
> > >> > >> > >>>> >> Max
> > >> > >> > >>>> >>
> > >> > >> > >>>> >>
> > >> > >> > >>>> >> On Thu, Sep 24, 2015 at 2:53 PM, Fabian Hueske <
> > >> > >> [hidden email]
> > >> > >> > <javascript:;>>
> > >> > >> > >>>> wrote:
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> Thanks everybody for feedback and comments.
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> Regarding 1) and 2):
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> I like the idea of keeping the discussion of new
> > features
> > >> and
> > >> > >> > >>>> >> improvements
> > >> > >> > >>>> >>> in JIRA as Kostas proposed.
> > >> > >> > >>>> >>> Our coding guidelines [1] already request a JIRA issue
> > for
> > >> > each
> > >> > >> > pull
> > >> > >> > >>>> >>> request.
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> How about we highlight this requirement more
> prominently
> > >> and
> > >> > >> > follow
> > >> > >> > >>>> this
> > >> > >> > >>>> >>> rule more strict from now on.
> > >> > >> > >>>> >>> JIRA issues for new features and improvements should
> > >> clearly
> > >> > >> > >>>> specify the
> > >> > >> > >>>> >>> scope and requirements for the new feature /
> > improvement.
> > >> > >> > >>>> >>> The level of detail is up to the reporter of the
> issue,
> > but
> > >> > the
> > >> > >> > >>>> community
> > >> > >> > >>>> >>> can request more detail or change the scope and
> > >> requirements
> > >> > by
> > >> > >> > >>>> >> discussion.
> > >> > >> > >>>> >>> When a JIRA issue for a new feature or improvement is
> > >> opened,
> > >> > >> the
> > >> > >> > >>>> >> community
> > >> > >> > >>>> >>> can start a discussion whether the feature is
> desirable
> > for
> > >> > >> Flink
> > >> > >> > >>>> or not.
> > >> > >> > >>>> >>> Any contributor (including the reporter) can also
> > attach a
> > >> > >> > >>>> >>> "design-doc-requested" label to the issue. A design
> > >> document
> > >> > can
> > >> > >> > be
> > >> > >> > >>>> >>> proposed by anybody, including the reporter or
> assignee
> > of
> > >> > the
> > >> > >> > JIRA
> > >> > >> > >>>> >> issue.
> > >> > >> > >>>> >>> However, the issue cannot be resolved and a
> > corresponding
> > >> PR
> > >> > not
> > >> > >> > be
> > >> > >> > >>>> >> merged
> > >> > >> > >>>> >>> before a design document has been accepted by lazy
> > >> consensus.
> > >> > >> > >>>> Hence, an
> > >> > >> > >>>> >>> assignee should propose a design doc before starting
> to
> > >> code
> > >> > to
> > >> > >> > >>>> avoid
> > >> > >> > >>>> >> major
> > >> > >> > >>>> >>> redesigns of the implementation.
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> This way it is up to the community when to start a
> > >> discussion
> > >> > >> > about
> > >> > >> > >>>> >> whether
> > >> > >> > >>>> >>> a feature request is accepted or to request a design
> > >> > document.
> > >> > >> We
> > >> > >> > >>>> can
> > >> > >> > >>>> >> make
> > >> > >> > >>>> >>> design documents mandatory for changes that touch the
> > >> public
> > >> > >> API.
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> Regarding 3):
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> I agree with Vasia, that we should collect suggestions
> > for
> > >> > >> common
> > >> > >> > >>>> >> patterns
> > >> > >> > >>>> >>> and also continuously update the coding guidelines.
> > >> > >> > >>>> >>> @Henry, I had best practices (exception handling,
> tests,
> > >> > etc.)
> > >> > >> in
> > >> > >> > >>>> mind.
> > >> > >> > >>>> >>> Syntactic code style is important as well, but we
> should
> > >> > have a
> > >> > >> > >>>> separate
> > >> > >> > >>>> >>> discussion about that, IMO.
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> Proposal for a design document template:
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> - Overview of general approach
> > >> > >> > >>>> >>> - API changes (changed interfaces, new / deprecated
> > >> > >> configuration
> > >> > >> > >>>> >>> parameters, changed behavior)
> > >> > >> > >>>> >>> - Main components and classes to touch
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> Cheers,
> > >> > >> > >>>> >>> Fabian
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> [1] http://flink.apache.org/coding-guidelines.html
> > >> > >> > >>>> >>> <http://flink.apache.org/coding-guidelines.html>
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>> 2015-09-24 10:52 GMT+02:00 Chiwan Park <
> > >> > [hidden email]
> > >> > >> > <javascript:;>>:
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>>> Thanks Fabian for starting the discussion.
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>> +1 for overall approach.
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>> About (1), expressing that consensus must be required
> > for
> > >> > new
> > >> > >> > >>>> feature
> > >> > >> > >>>> >> in
> > >> > >> > >>>> >>>> “How to contribute” page is very nice. Some pull
> > requests
> > >> > were
> > >> > >> > sent
> > >> > >> > >>>> >> without
> > >> > >> > >>>> >>>> consensus. The contributors had to rewrote their pull
> > >> > requests.
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>> Agree with (2), (3) and (4).
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>> Regards,
> > >> > >> > >>>> >>>> Chiwan Park
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>>> On Sep 24, 2015, at 2:23 AM, Henry Saputra <
> > >> > >> > >>>> [hidden email] <javascript:;>>
> > >> > >> > >>>> >>>> wrote:
> > >> > >> > >>>> >>>>>
> > >> > >> > >>>> >>>>> Thanks again, Fabian for starting the discussions.
> > >> > >> > >>>> >>>>>
> > >> > >> > >>>> >>>>> For (1) and (2) I think it is good idea and will
> help
> > >> > people
> > >> > >> to
> > >> > >> > >>>> >>>>> understand and follow the author thought process.
> > >> > >> > >>>> >>>>> Following up with Stephan's reply, some new features
> > >> > solutions
> > >> > >> > >>>> could
> > >> > >> > >>>> >>>>> be explained thoroughly in the PR descriptions but
> > some
> > >> > >> requires
> > >> > >> > >>>> >>>>> additional reviews of the proposed design.
> > >> > >> > >>>> >>>>> I like the idea of using tag in JIRA whether new
> > features
> > >> > >> should
> > >> > >> > >>>> or
> > >> > >> > >>>> >>>>> should not being accompanied by design document.
> > >> > >> > >>>> >>>>>
> > >> > >> > >>>> >>>>> Agree with (3) and (4).
> > >> > >> > >>>> >>>>> As for (3) are you thinking about more of style of
> > code
> > >> > syntax
> > >> > >> > via
> > >> > >> > >>>> >>>>> checkstyle updates, or best practices in term of no
> > >> mutable
> > >> > >> > state
> > >> > >> > >>>> if
> > >> > >> > >>>> >>>>> possible, throw precise Exception if possible for
> > >> > interfaces,
> > >> > >> > >>>> etc. ?
> > >> > >> > >>>> >>>>>
> > >> > >> > >>>> >>>>> - Henry
> > >> > >> > >>>> >>>>>
> > >> > >> > >>>> >>>>>
> > >> > >> > >>>> >>>>>
> > >> > >> > >>>> >>>>>
> > >> > >> > >>>> >>>>> On Wed, Sep 23, 2015 at 9:31 AM, Stephan Ewen <
> > >> > >> [hidden email]
> > >> > >> > <javascript:;>>
> > >> > >> > >>>> >> wrote:
> > >> > >> > >>>> >>>>>> Thanks, Fabian for driving this!
> > >> > >> > >>>> >>>>>>
> > >> > >> > >>>> >>>>>> I agree with your points.
> > >> > >> > >>>> >>>>>>
> > >> > >> > >>>> >>>>>> Concerning Vasia's comment to not raise the bar too
> > >> high:
> > >> > >> > >>>> >>>>>> That is true, the requirements should be
> reasonable.
> > We
> > >> > can
> > >> > >> > >>>> >> definitely
> > >> > >> > >>>> >>>> tag
> > >> > >> > >>>> >>>>>> issues as "simple" which means they do not require
> a
> > >> > design
> > >> > >> > >>>> >> document.
> > >> > >> > >>>> >>>> That
> > >> > >> > >>>> >>>>>> should be more for new features and needs not be
> very
> > >> > >> detailed.
> > >> > >> > >>>> >>>>>>
> > >> > >> > >>>> >>>>>> We could also make the inverse, meaning we
> explicitly
> > >> tag
> > >> > >> > certain
> > >> > >> > >>>> >>>> issues as
> > >> > >> > >>>> >>>>>> "requires design document".
> > >> > >> > >>>> >>>>>>
> > >> > >> > >>>> >>>>>> Greetings,
> > >> > >> > >>>> >>>>>> Stephan
> > >> > >> > >>>> >>>>>>
> > >> > >> > >>>> >>>>>>
> > >> > >> > >>>> >>>>>>
> > >> > >> > >>>> >>>>>>
> > >> > >> > >>>> >>>>>> On Wed, Sep 23, 2015 at 5:05 PM, Vasiliki Kalavri <
> > >> > >> > >>>> >>>> [hidden email] <javascript:;>
> > >> > >> > >>>> >>>>>>> wrote:
> > >> > >> > >>>> >>>>>>
> > >> > >> > >>>> >>>>>>> Hi,
> > >> > >> > >>>> >>>>>>>
> > >> > >> > >>>> >>>>>>> I agree with you Fabian. Clarifying these issues
> in
> > the
> > >> > "How
> > >> > >> > to
> > >> > >> > >>>> >>>> Contribute"
> > >> > >> > >>>> >>>>>>> guide will save lots of time both to reviewers and
> > >> > >> > contributors.
> > >> > >> > >>>> >> It is
> > >> > >> > >>>> >>>> a
> > >> > >> > >>>> >>>>>>> really disappointing situation when someone spends
> > time
> > >> > >> > >>>> >> implementing
> > >> > >> > >>>> >>>>>>> something and their PR ends up being rejected
> > because
> > >> > either
> > >> > >> > the
> > >> > >> > >>>> >>>> feature
> > >> > >> > >>>> >>>>>>> was not needed or the implementation details were
> > never
> > >> > >> agreed
> > >> > >> > >>>> on.
> > >> > >> > >>>> >>>>>>>
> > >> > >> > >>>> >>>>>>> That said, I think we should also make sure that
> we
> > >> don't
> > >> > >> > raise
> > >> > >> > >>>> the
> > >> > >> > >>>> >>>> bar too
> > >> > >> > >>>> >>>>>>> high for simple contributions.
> > >> > >> > >>>> >>>>>>>
> > >> > >> > >>>> >>>>>>> Regarding (1) and (2), I think we should clarify
> > what
> > >> > kind
> > >> > >> of
> > >> > >> > >>>> >>>>>>> additions/changes require this process to be
> > followed.
> > >> > e.g.
> > >> > >> do
> > >> > >> > >>>> we
> > >> > >> > >>>> >> need
> > >> > >> > >>>> >>>> to
> > >> > >> > >>>> >>>>>>> discuss additions for which JIRAs already exist?
> > Ideas
> > >> > >> > described
> > >> > >> > >>>> >> in the
> > >> > >> > >>>> >>>>>>> roadmaps? Adding a new algorithm to
> Gelly/Flink-ML?
> > >> > >> > >>>> >>>>>>>
> > >> > >> > >>>> >>>>>>> Regarding (3), maybe we can all suggest some
> > >> > >> examples/patterns
> > >> > >> > >>>> that
> > >> > >> > >>>> >>>> we've
> > >> > >> > >>>> >>>>>>> seen when reviewing PRs and then choose the most
> > common
> > >> > (or
> > >> > >> > >>>> all).
> > >> > >> > >>>> >>>>>>>
> > >> > >> > >>>> >>>>>>> (4) sounds good to me.
> > >> > >> > >>>> >>>>>>>
> > >> > >> > >>>> >>>>>>> Cheers,
> > >> > >> > >>>> >>>>>>> Vasia.
> > >> > >> > >>>> >>>>>>>
> > >> > >> > >>>> >>>>>>> On 23 September 2015 at 15:08, Kostas Tzoumas <
> > >> > >> > >>>> [hidden email] <javascript:;>
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>>> wrote:
> > >> > >> > >>>> >>>>>>>
> > >> > >> > >>>> >>>>>>>> Big +1.
> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >>>> >>>>>>>> For (1), a discussion in JIRA would also be an
> > option
> > >> > IMO
> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >>>> >>>>>>>> For (2), let us come up with few examples on what
> > >> > >> > constitutes a
> > >> > >> > >>>> >>>> feature
> > >> > >> > >>>> >>>>>>>> that needs a design doc, and what should be in
> the
> > doc
> > >> > (IMO
> > >> > >> > >>>> >>>>>>>> architecture/general approach, components
> touched,
> > >> > >> interfaces
> > >> > >> > >>>> >> changed)
> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >>>> >>>>>>>> On Wed, Sep 23, 2015 at 2:24 PM, Fabian Hueske <
> > >> > >> > >>>> [hidden email] <javascript:;>
> > >> > >> > >>>> >>>
> > >> > >> > >>>> >>>>>>> wrote:
> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >>>> >>>>>>>>> Hi everybody,
> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >>>> >>>>>>>>> I guess we all have noticed that the Flink
> > community
> > >> is
> > >> > >> > >>>> quickly
> > >> > >> > >>>> >>>> growing
> > >> > >> > >>>> >>>>>>>> and
> > >> > >> > >>>> >>>>>>>>> more and more contributions are coming in.
> > Recently,
> > >> a
> > >> > few
> > >> > >> > >>>> >>>>>>> contributions
> > >> > >> > >>>> >>>>>>>>> proposed new features without being discussed on
> > the
> > >> > >> mailing
> > >> > >> > >>>> >> list.
> > >> > >> > >>>> >>>> Some
> > >> > >> > >>>> >>>>>>>> of
> > >> > >> > >>>> >>>>>>>>> these contributions were not accepted in the
> end.
> > In
> > >> > other
> > >> > >> > >>>> cases,
> > >> > >> > >>>> >>>> pull
> > >> > >> > >>>> >>>>>>>>> requests had to be heavily reworked because the
> > >> > approach
> > >> > >> > taken
> > >> > >> > >>>> >> was
> > >> > >> > >>>> >>>> not
> > >> > >> > >>>> >>>>>>>> the
> > >> > >> > >>>> >>>>>>>>> best one. These are situations which should be
> > >> avoided
> > >> > >> > because
> > >> > >> > >>>> >> both
> > >> > >> > >>>> >>>> the
> > >> > >> > >>>> >>>>>>>>> contributor as well as the person who reviewed
> the
> > >> > >> > >>>> contribution
> > >> > >> > >>>> >>>>>>> invested
> > >> > >> > >>>> >>>>>>>> a
> > >> > >> > >>>> >>>>>>>>> lot of time for nothing.
> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >>>> >>>>>>>>> I had a look at our “How to contribute” and
> > “Coding
> > >> > >> > guideline”
> > >> > >> > >>>> >> pages
> > >> > >> > >>>> >>>>>>> and
> > >> > >> > >>>> >>>>>>>>> think, we can improve them. I see basically two
> > >> issues:
> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >>>> >>>>>>>>> 1. The documents do not explain how to propose
> and
> > >> > discuss
> > >> > >> > new
> > >> > >> > >>>> >>>>>>> features
> > >> > >> > >>>> >>>>>>>>> and improvements.
> > >> > >> > >>>> >>>>>>>>> 2. The documents are quite technical and the
> > >> structure
> > >> > >> could
> > >> > >> > >>>> be
> > >> > >> > >>>> >>>>>>>> improved,
> > >> > >> > >>>> >>>>>>>>> IMO.
> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >>>> >>>>>>>>> I would like to improve these pages and propose
> > the
> > >> > >> > following
> > >> > >> > >>>> >>>>>>> additions:
> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >>>> >>>>>>>>> 1. Request contributors and committers to start
> > >> > >> discussions
> > >> > >> > on
> > >> > >> > >>>> >> the
> > >> > >> > >>>> >>>>>>>>> mailing list for new features. This discussion
> > should
> > >> > help
> > >> > >> > to
> > >> > >> > >>>> >> figure
> > >> > >> > >>>> >>>>>>> out
> > >> > >> > >>>> >>>>>>>>> whether such a new feature is a good fit for
> Flink
> > >> and
> > >> > >> give
> > >> > >> > >>>> first
> > >> > >> > >>>> >>>>>>>> pointers
> > >> > >> > >>>> >>>>>>>>> for a design to implement it.
> > >> > >> > >>>> >>>>>>>>> 2. Require contributors and committers to write
> > >> design
> > >> > >> > >>>> >> documents for
> > >> > >> > >>>> >>>>>>>> all
> > >> > >> > >>>> >>>>>>>>> new features and major improvements. These
> > documents
> > >> > >> should
> > >> > >> > be
> > >> > >> > >>>> >>>> attached
> > >> > >> > >>>> >>>>>>>> to
> > >> > >> > >>>> >>>>>>>>> a JIRA issue and follow a template which needs
> to
> > be
> > >> > >> > defined.
> > >> > >> > >>>> >>>>>>>>> 3. Extend the “Coding Style Guides” and add
> > patterns
> > >> > that
> > >> > >> > are
> > >> > >> > >>>> >>>>>>> commonly
> > >> > >> > >>>> >>>>>>>>> remarked in pull requests.
> > >> > >> > >>>> >>>>>>>>> 4. Restructure the current pages into three
> > pages: a
> > >> > >> general
> > >> > >> > >>>> >> guide
> > >> > >> > >>>> >>>>>>> for
> > >> > >> > >>>> >>>>>>>>> contributions and two guides for how to
> > contribute to
> > >> > code
> > >> > >> > and
> > >> > >> > >>>> >>>> website
> > >> > >> > >>>> >>>>>>>> with
> > >> > >> > >>>> >>>>>>>>> all technical issues (repository, IDE setup,
> build
> > >> > system,
> > >> > >> > >>>> etc.)
> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >>>> >>>>>>>>> Looking forward for your comments,
> > >> > >> > >>>> >>>>>>>>> Fabian
> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >>>> >>>>>>>
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>>>
> > >> > >> > >>>> >>
> > >> > >> > >>>>
> > >> > >> > >>>>
> > >> > >> > >>>>
> > >> > >> > >>>>
> > >> > >> > >>>>
> > >> > >> > >>>>
> > >> > >> > >>>
> > >> > >> > >>
> > >> > >> > >
> > >> > >> >
> > >> > >>
> > >> >
> > >>
> >
>

[mxm]

+1 for the documentation check box.

Are we requiring local builds? Travis builds are fine, right? So what
about "Builds locally or on Travis"?

Could we add more subpoints from the How to Contribute guide?

[X] General
  - JIRA issue associated
  - Single PR per change
  - Meaningful commit message

[X] CodeStyle
  - No unnecessary style changes
  - Check Style passes

[X] Documentation
  - New documentation added
  - Old documentation updated
  - Javadocs for public methods

[X] Tests
   - Tests added or adapted
   - Executed mvn verify or built on Travis


Martin, do you want to move this discussion to a new thread and
propose a template?

Cheers,
Max

On Fri, Feb 19, 2016 at 10:39 AM, Fabian Hueske <[hidden email]> wrote:

> Thanks Martin!
>
> can you add two more fields?
>
> - Builds locally (mvn clean verify)
> - Documentation updated or not updates necessary
>
> Best, Fabian
>
> 2016-02-19 9:35 GMT+01:00 Martin Liesenberg <[hidden email]>:
>
>> Cool, if no one objects, I'll create a JIRA ticket and open a corresponding
>> PR during the weekend.
>>
>> Best regards
>> Martin
>>
>> On Thu, 18 Feb 2016, 17:36 Maximilian Michels <[hidden email]> wrote:
>>
>> > Hi Martin,
>> >
>> > Sounds like a good idea to me to create a checklist like this. It
>> > would be a nice reminder for people who didn't read the
>> > how-to-contribute section of the README :)
>> >
>> > Cheers,
>> > Max
>> >
>> > On Thu, Feb 18, 2016 at 9:31 AM, Martin Liesenberg
>> > <[hidden email]> wrote:
>> > > Hi,
>> > >
>> > > GitHub just introduced a way to supply PR templates. [1]
>> > >
>> > > To support the changes discussed here, we could add a simple template
>> > with
>> > > check boxes like:
>> > > [ ] did you add tests
>> > > [ ] did you check against the coding guidelines
>> > > [ ] is there a jira supporting the PR
>> > >
>> > > Let me know what you think. The language/tone probably needs a bit of
>> > > refinement.
>> > >
>> > > best regards
>> > > martin
>> > >
>> > > [1] https://github.com/blog/2111-issue-and-pull-request-templates
>> > >
>> > > Till Rohrmann <[hidden email]> schrieb am Do., 15. Okt. 2015 um
>> > > 11:58 Uhr:
>> > >
>> > >> Thanks for leading the effort Fabian!
>> > >>
>> > >> On Fri, Oct 9, 2015 at 10:07 AM, Maximilian Michels <[hidden email]>
>> > >> wrote:
>> > >>
>> > >> > Very nice work, Fabian. I think we'll have to send around a reminder
>> > >> > from time to time and, perhaps, evaluate the new guidelines after
>> some
>> > >> > period of time. It's great to have these documents now as a
>> reference.
>> > >> >
>> > >> > On Thu, Oct 8, 2015 at 5:36 PM, Stephan Ewen <[hidden email]>
>> > wrote:
>> > >> > > Great, thanks Fabian!
>> > >> > >
>> > >> > > On Thu, Oct 8, 2015 at 5:28 PM, Henry Saputra <
>> > [hidden email]
>> > >> >
>> > >> > > wrote:
>> > >> > >
>> > >> > >> Thanks again for leading this effort, Fabian
>> > >> > >>
>> > >> > >> - Henry
>> > >> > >>
>> > >> > >> On Thursday, October 8, 2015, Fabian Hueske <[hidden email]>
>> > >> wrote:
>> > >> > >>
>> > >> > >> > Hi everybody,
>> > >> > >> >
>> > >> > >> > I merged our new contribution guidelines a few minutes ago.
>> > >> > >> >
>> > >> > >> > I'd like to emphasize that these rules do not have any effect,
>> if
>> > >> > nobody
>> > >> > >> > follows them.
>> > >> > >> > So please follow our contribution rules and make others aware
>> of
>> > >> them
>> > >> > as
>> > >> > >> > well.
>> > >> > >> >
>> > >> > >> > Specifically
>> > >> > >> > - pay attention that all PRs are backed by a JIRA and ask to
>> > create
>> > >> a
>> > >> > >> JIRA
>> > >> > >> > if that is not the case
>> > >> > >> > - early discuss whether a feature request is valid (before code
>> > is
>> > >> > >> > contributed) to avoid frustrating late rejections of PRs.
>> > >> > >> > - request, provide, and discuss design docs for sensible
>> > >> > contributions to
>> > >> > >> > avoid major redesigns / rejections of PRs.
>> > >> > >> >
>> > >> > >> > Thank you,
>> > >> > >> > Fabian
>> > >> > >> >
>> > >> > >> > 2015-10-07 10:16 GMT+02:00 Fabian Hueske <[hidden email]
>> > >> > >> <javascript:;>
>> > >> > >> > >:
>> > >> > >> >
>> > >> > >> > > Thanks for the feedback everybody.
>> > >> > >> > > I updated the PR and would like to merge it later today if
>> > there
>> > >> > are no
>> > >> > >> > > more comments.
>> > >> > >> > >
>> > >> > >> > > Cheers, Fabian
>> > >> > >> > >
>> > >> > >> > >
>> > >> > >> > > 2015-10-05 14:09 GMT+02:00 Fabian Hueske <[hidden email]
>> > >> > >> > <javascript:;>>:
>> > >> > >> > >
>> > >> > >> > >> Hi,
>> > >> > >> > >>
>> > >> > >> > >> I opened a PR with the discussed changes [1].
>> > >> > >> > >> Please review, give feedback, and suggest changes.
>> > >> > >> > >>
>> > >> > >> > >> Cheers, Fabian
>> > >> > >> > >>
>> > >> > >> > >> [1] https://github.com/apache/flink-web/pull/11
>> > >> > >> > >>
>> > >> > >> > >>
>> > >> > >> > >> 2015-09-28 18:02 GMT+02:00 Fabian Hueske <[hidden email]
>> > >> > >> > <javascript:;>>:
>> > >> > >> > >>
>> > >> > >> > >>> @Chiwan, sure. Will do that. Thanks for pointing it out :-)
>> > >> > >> > >>>
>> > >> > >> > >>> 2015-09-28 18:00 GMT+02:00 Chiwan Park <
>> > [hidden email]
>> > >> > >> > <javascript:;>>:
>> > >> > >> > >>>
>> > >> > >> > >>>> @Fabian, Could you cover FLINK-2712 in your pull request?
>> I
>> > >> think
>> > >> > >> that
>> > >> > >> > >>>> it would be better than split pull request.
>> > >> > >> > >>>>
>> > >> > >> > >>>> Regards,
>> > >> > >> > >>>> Chiwan Park
>> > >> > >> > >>>>
>> > >> > >> > >>>> > On Sep 28, 2015, at 4:51 PM, Fabian Hueske <
>> > >> [hidden email]
>> > >> > >> > <javascript:;>> wrote:
>> > >> > >> > >>>> >
>> > >> > >> > >>>> > Thanks everybody for the discussion.
>> > >> > >> > >>>> > I'll prepare a pull request to update the "How to
>> > contribute"
>> > >> > and
>> > >> > >> > >>>> "Coding
>> > >> > >> > >>>> > Guidelines".
>> > >> > >> > >>>> >
>> > >> > >> > >>>> > Thanks,
>> > >> > >> > >>>> > Fabian
>> > >> > >> > >>>> >
>> > >> > >> > >>>> > 2015-09-26 9:06 GMT+02:00 Maximilian Michels <
>> > [hidden email]
>> > >> > >> > <javascript:;>>:
>> > >> > >> > >>>> >
>> > >> > >> > >>>> >> Hi Fabian,
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> This is a very important topic. Thanks for starting the
>> > >> > >> discussion.
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> 1) JIRA discussion
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> Absolutely. No new feature should be introduced
>> without a
>> > >> > >> > discussion.
>> > >> > >> > >>>> >> Frankly, I see the problem that sometimes discussions
>> > only
>> > >> > come
>> > >> > >> up
>> > >> > >> > >>>> >> when the pull request has been opened. However, this
>> can
>> > be
>> > >> > >> > overcome
>> > >> > >> > >>>> >> by the design document.
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> 2) Design document
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> +1 for the document. It increases transparency but also
>> > >> helps
>> > >> > the
>> > >> > >> > >>>> >> contributor to think his idea through before starting
>> to
>> > >> code.
>> > >> > >> The
>> > >> > >> > >>>> >> document could also be written directly in JIRA. That
>> > way,
>> > >> it
>> > >> > is
>> > >> > >> > more
>> > >> > >> > >>>> >> accessible. JIRA offers mark up; even images can be
>> > attached
>> > >> > and
>> > >> > >> > >>>> >> displayed in the JIRA description.
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> I'd like to propose another section "Limitations" for
>> the
>> > >> > design
>> > >> > >> > >>>> >> document. Breaking API changes should also be listed
>> on a
>> > >> > special
>> > >> > >> > >>>> Wiki
>> > >> > >> > >>>> >> page.
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> 3) Coding style
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> In addition to updating the document, do we want to
>> > enforce
>> > >> > >> coding
>> > >> > >> > >>>> >> styles also by adding new Maven Checkstyle rules? IMHO
>> > >> strict
>> > >> > >> rules
>> > >> > >> > >>>> >> could cause more annoyances than they actually
>> > contribute to
>> > >> > the
>> > >> > >> > >>>> >> readability of the code. Perhaps this should be
>> discussed
>> > >> in a
>> > >> > >> > >>>> >> separate thread.
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> +1 for collecting common problems and design patterns
>> to
>> > >> > include
>> > >> > >> > them
>> > >> > >> > >>>> >> in the document. I was thinking, that we should also
>> > cover
>> > >> > some
>> > >> > >> of
>> > >> > >> > >>>> the
>> > >> > >> > >>>> >> features of tools and dependencies we heavily use, e.g.
>> > >> > Travis,
>> > >> > >> > >>>> >> Mockito, Guava, Log4j, FlinkMiniCluster, Unit testing
>> vs
>> > IT
>> > >> > >> cases,
>> > >> > >> > >>>> >> etc.
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> 4 ) Restructuring the how to contribute guide
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> Good idea to have a meta document that explains how
>> > >> > contributing
>> > >> > >> > >>>> works
>> > >> > >> > >>>> >> in general, and another document for technical things.
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> Cheers,
>> > >> > >> > >>>> >> Max
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >>
>> > >> > >> > >>>> >> On Thu, Sep 24, 2015 at 2:53 PM, Fabian Hueske <
>> > >> > >> [hidden email]
>> > >> > >> > <javascript:;>>
>> > >> > >> > >>>> wrote:
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> Thanks everybody for feedback and comments.
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> Regarding 1) and 2):
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> I like the idea of keeping the discussion of new
>> > features
>> > >> and
>> > >> > >> > >>>> >> improvements
>> > >> > >> > >>>> >>> in JIRA as Kostas proposed.
>> > >> > >> > >>>> >>> Our coding guidelines [1] already request a JIRA issue
>> > for
>> > >> > each
>> > >> > >> > pull
>> > >> > >> > >>>> >>> request.
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> How about we highlight this requirement more
>> prominently
>> > >> and
>> > >> > >> > follow
>> > >> > >> > >>>> this
>> > >> > >> > >>>> >>> rule more strict from now on.
>> > >> > >> > >>>> >>> JIRA issues for new features and improvements should
>> > >> clearly
>> > >> > >> > >>>> specify the
>> > >> > >> > >>>> >>> scope and requirements for the new feature /
>> > improvement.
>> > >> > >> > >>>> >>> The level of detail is up to the reporter of the
>> issue,
>> > but
>> > >> > the
>> > >> > >> > >>>> community
>> > >> > >> > >>>> >>> can request more detail or change the scope and
>> > >> requirements
>> > >> > by
>> > >> > >> > >>>> >> discussion.
>> > >> > >> > >>>> >>> When a JIRA issue for a new feature or improvement is
>> > >> opened,
>> > >> > >> the
>> > >> > >> > >>>> >> community
>> > >> > >> > >>>> >>> can start a discussion whether the feature is
>> desirable
>> > for
>> > >> > >> Flink
>> > >> > >> > >>>> or not.
>> > >> > >> > >>>> >>> Any contributor (including the reporter) can also
>> > attach a
>> > >> > >> > >>>> >>> "design-doc-requested" label to the issue. A design
>> > >> document
>> > >> > can
>> > >> > >> > be
>> > >> > >> > >>>> >>> proposed by anybody, including the reporter or
>> assignee
>> > of
>> > >> > the
>> > >> > >> > JIRA
>> > >> > >> > >>>> >> issue.
>> > >> > >> > >>>> >>> However, the issue cannot be resolved and a
>> > corresponding
>> > >> PR
>> > >> > not
>> > >> > >> > be
>> > >> > >> > >>>> >> merged
>> > >> > >> > >>>> >>> before a design document has been accepted by lazy
>> > >> consensus.
>> > >> > >> > >>>> Hence, an
>> > >> > >> > >>>> >>> assignee should propose a design doc before starting
>> to
>> > >> code
>> > >> > to
>> > >> > >> > >>>> avoid
>> > >> > >> > >>>> >> major
>> > >> > >> > >>>> >>> redesigns of the implementation.
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> This way it is up to the community when to start a
>> > >> discussion
>> > >> > >> > about
>> > >> > >> > >>>> >> whether
>> > >> > >> > >>>> >>> a feature request is accepted or to request a design
>> > >> > document.
>> > >> > >> We
>> > >> > >> > >>>> can
>> > >> > >> > >>>> >> make
>> > >> > >> > >>>> >>> design documents mandatory for changes that touch the
>> > >> public
>> > >> > >> API.
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> Regarding 3):
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> I agree with Vasia, that we should collect suggestions
>> > for
>> > >> > >> common
>> > >> > >> > >>>> >> patterns
>> > >> > >> > >>>> >>> and also continuously update the coding guidelines.
>> > >> > >> > >>>> >>> @Henry, I had best practices (exception handling,
>> tests,
>> > >> > etc.)
>> > >> > >> in
>> > >> > >> > >>>> mind.
>> > >> > >> > >>>> >>> Syntactic code style is important as well, but we
>> should
>> > >> > have a
>> > >> > >> > >>>> separate
>> > >> > >> > >>>> >>> discussion about that, IMO.
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> Proposal for a design document template:
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> - Overview of general approach
>> > >> > >> > >>>> >>> - API changes (changed interfaces, new / deprecated
>> > >> > >> configuration
>> > >> > >> > >>>> >>> parameters, changed behavior)
>> > >> > >> > >>>> >>> - Main components and classes to touch
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> Cheers,
>> > >> > >> > >>>> >>> Fabian
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> [1] http://flink.apache.org/coding-guidelines.html
>> > >> > >> > >>>> >>> <http://flink.apache.org/coding-guidelines.html>
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>> 2015-09-24 10:52 GMT+02:00 Chiwan Park <
>> > >> > [hidden email]
>> > >> > >> > <javascript:;>>:
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>>> Thanks Fabian for starting the discussion.
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>> +1 for overall approach.
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>> About (1), expressing that consensus must be required
>> > for
>> > >> > new
>> > >> > >> > >>>> feature
>> > >> > >> > >>>> >> in
>> > >> > >> > >>>> >>>> “How to contribute” page is very nice. Some pull
>> > requests
>> > >> > were
>> > >> > >> > sent
>> > >> > >> > >>>> >> without
>> > >> > >> > >>>> >>>> consensus. The contributors had to rewrote their pull
>> > >> > requests.
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>> Agree with (2), (3) and (4).
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>> Regards,
>> > >> > >> > >>>> >>>> Chiwan Park
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>>> On Sep 24, 2015, at 2:23 AM, Henry Saputra <
>> > >> > >> > >>>> [hidden email] <javascript:;>>
>> > >> > >> > >>>> >>>> wrote:
>> > >> > >> > >>>> >>>>>
>> > >> > >> > >>>> >>>>> Thanks again, Fabian for starting the discussions.
>> > >> > >> > >>>> >>>>>
>> > >> > >> > >>>> >>>>> For (1) and (2) I think it is good idea and will
>> help
>> > >> > people
>> > >> > >> to
>> > >> > >> > >>>> >>>>> understand and follow the author thought process.
>> > >> > >> > >>>> >>>>> Following up with Stephan's reply, some new features
>> > >> > solutions
>> > >> > >> > >>>> could
>> > >> > >> > >>>> >>>>> be explained thoroughly in the PR descriptions but
>> > some
>> > >> > >> requires
>> > >> > >> > >>>> >>>>> additional reviews of the proposed design.
>> > >> > >> > >>>> >>>>> I like the idea of using tag in JIRA whether new
>> > features
>> > >> > >> should
>> > >> > >> > >>>> or
>> > >> > >> > >>>> >>>>> should not being accompanied by design document.
>> > >> > >> > >>>> >>>>>
>> > >> > >> > >>>> >>>>> Agree with (3) and (4).
>> > >> > >> > >>>> >>>>> As for (3) are you thinking about more of style of
>> > code
>> > >> > syntax
>> > >> > >> > via
>> > >> > >> > >>>> >>>>> checkstyle updates, or best practices in term of no
>> > >> mutable
>> > >> > >> > state
>> > >> > >> > >>>> if
>> > >> > >> > >>>> >>>>> possible, throw precise Exception if possible for
>> > >> > interfaces,
>> > >> > >> > >>>> etc. ?
>> > >> > >> > >>>> >>>>>
>> > >> > >> > >>>> >>>>> - Henry
>> > >> > >> > >>>> >>>>>
>> > >> > >> > >>>> >>>>>
>> > >> > >> > >>>> >>>>>
>> > >> > >> > >>>> >>>>>
>> > >> > >> > >>>> >>>>> On Wed, Sep 23, 2015 at 9:31 AM, Stephan Ewen <
>> > >> > >> [hidden email]
>> > >> > >> > <javascript:;>>
>> > >> > >> > >>>> >> wrote:
>> > >> > >> > >>>> >>>>>> Thanks, Fabian for driving this!
>> > >> > >> > >>>> >>>>>>
>> > >> > >> > >>>> >>>>>> I agree with your points.
>> > >> > >> > >>>> >>>>>>
>> > >> > >> > >>>> >>>>>> Concerning Vasia's comment to not raise the bar too
>> > >> high:
>> > >> > >> > >>>> >>>>>> That is true, the requirements should be
>> reasonable.
>> > We
>> > >> > can
>> > >> > >> > >>>> >> definitely
>> > >> > >> > >>>> >>>> tag
>> > >> > >> > >>>> >>>>>> issues as "simple" which means they do not require
>> a
>> > >> > design
>> > >> > >> > >>>> >> document.
>> > >> > >> > >>>> >>>> That
>> > >> > >> > >>>> >>>>>> should be more for new features and needs not be
>> very
>> > >> > >> detailed.
>> > >> > >> > >>>> >>>>>>
>> > >> > >> > >>>> >>>>>> We could also make the inverse, meaning we
>> explicitly
>> > >> tag
>> > >> > >> > certain
>> > >> > >> > >>>> >>>> issues as
>> > >> > >> > >>>> >>>>>> "requires design document".
>> > >> > >> > >>>> >>>>>>
>> > >> > >> > >>>> >>>>>> Greetings,
>> > >> > >> > >>>> >>>>>> Stephan
>> > >> > >> > >>>> >>>>>>
>> > >> > >> > >>>> >>>>>>
>> > >> > >> > >>>> >>>>>>
>> > >> > >> > >>>> >>>>>>
>> > >> > >> > >>>> >>>>>> On Wed, Sep 23, 2015 at 5:05 PM, Vasiliki Kalavri <
>> > >> > >> > >>>> >>>> [hidden email] <javascript:;>
>> > >> > >> > >>>> >>>>>>> wrote:
>> > >> > >> > >>>> >>>>>>
>> > >> > >> > >>>> >>>>>>> Hi,
>> > >> > >> > >>>> >>>>>>>
>> > >> > >> > >>>> >>>>>>> I agree with you Fabian. Clarifying these issues
>> in
>> > the
>> > >> > "How
>> > >> > >> > to
>> > >> > >> > >>>> >>>> Contribute"
>> > >> > >> > >>>> >>>>>>> guide will save lots of time both to reviewers and
>> > >> > >> > contributors.
>> > >> > >> > >>>> >> It is
>> > >> > >> > >>>> >>>> a
>> > >> > >> > >>>> >>>>>>> really disappointing situation when someone spends
>> > time
>> > >> > >> > >>>> >> implementing
>> > >> > >> > >>>> >>>>>>> something and their PR ends up being rejected
>> > because
>> > >> > either
>> > >> > >> > the
>> > >> > >> > >>>> >>>> feature
>> > >> > >> > >>>> >>>>>>> was not needed or the implementation details were
>> > never
>> > >> > >> agreed
>> > >> > >> > >>>> on.
>> > >> > >> > >>>> >>>>>>>
>> > >> > >> > >>>> >>>>>>> That said, I think we should also make sure that
>> we
>> > >> don't
>> > >> > >> > raise
>> > >> > >> > >>>> the
>> > >> > >> > >>>> >>>> bar too
>> > >> > >> > >>>> >>>>>>> high for simple contributions.
>> > >> > >> > >>>> >>>>>>>
>> > >> > >> > >>>> >>>>>>> Regarding (1) and (2), I think we should clarify
>> > what
>> > >> > kind
>> > >> > >> of
>> > >> > >> > >>>> >>>>>>> additions/changes require this process to be
>> > followed.
>> > >> > e.g.
>> > >> > >> do
>> > >> > >> > >>>> we
>> > >> > >> > >>>> >> need
>> > >> > >> > >>>> >>>> to
>> > >> > >> > >>>> >>>>>>> discuss additions for which JIRAs already exist?
>> > Ideas
>> > >> > >> > described
>> > >> > >> > >>>> >> in the
>> > >> > >> > >>>> >>>>>>> roadmaps? Adding a new algorithm to
>> Gelly/Flink-ML?
>> > >> > >> > >>>> >>>>>>>
>> > >> > >> > >>>> >>>>>>> Regarding (3), maybe we can all suggest some
>> > >> > >> examples/patterns
>> > >> > >> > >>>> that
>> > >> > >> > >>>> >>>> we've
>> > >> > >> > >>>> >>>>>>> seen when reviewing PRs and then choose the most
>> > common
>> > >> > (or
>> > >> > >> > >>>> all).
>> > >> > >> > >>>> >>>>>>>
>> > >> > >> > >>>> >>>>>>> (4) sounds good to me.
>> > >> > >> > >>>> >>>>>>>
>> > >> > >> > >>>> >>>>>>> Cheers,
>> > >> > >> > >>>> >>>>>>> Vasia.
>> > >> > >> > >>>> >>>>>>>
>> > >> > >> > >>>> >>>>>>> On 23 September 2015 at 15:08, Kostas Tzoumas <
>> > >> > >> > >>>> [hidden email] <javascript:;>
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>>> wrote:
>> > >> > >> > >>>> >>>>>>>
>> > >> > >> > >>>> >>>>>>>> Big +1.
>> > >> > >> > >>>> >>>>>>>>
>> > >> > >> > >>>> >>>>>>>> For (1), a discussion in JIRA would also be an
>> > option
>> > >> > IMO
>> > >> > >> > >>>> >>>>>>>>
>> > >> > >> > >>>> >>>>>>>> For (2), let us come up with few examples on what
>> > >> > >> > constitutes a
>> > >> > >> > >>>> >>>> feature
>> > >> > >> > >>>> >>>>>>>> that needs a design doc, and what should be in
>> the
>> > doc
>> > >> > (IMO
>> > >> > >> > >>>> >>>>>>>> architecture/general approach, components
>> touched,
>> > >> > >> interfaces
>> > >> > >> > >>>> >> changed)
>> > >> > >> > >>>> >>>>>>>>
>> > >> > >> > >>>> >>>>>>>>
>> > >> > >> > >>>> >>>>>>>>
>> > >> > >> > >>>> >>>>>>>> On Wed, Sep 23, 2015 at 2:24 PM, Fabian Hueske <
>> > >> > >> > >>>> [hidden email] <javascript:;>
>> > >> > >> > >>>> >>>
>> > >> > >> > >>>> >>>>>>> wrote:
>> > >> > >> > >>>> >>>>>>>>
>> > >> > >> > >>>> >>>>>>>>> Hi everybody,
>> > >> > >> > >>>> >>>>>>>>>
>> > >> > >> > >>>> >>>>>>>>> I guess we all have noticed that the Flink
>> > community
>> > >> is
>> > >> > >> > >>>> quickly
>> > >> > >> > >>>> >>>> growing
>> > >> > >> > >>>> >>>>>>>> and
>> > >> > >> > >>>> >>>>>>>>> more and more contributions are coming in.
>> > Recently,
>> > >> a
>> > >> > few
>> > >> > >> > >>>> >>>>>>> contributions
>> > >> > >> > >>>> >>>>>>>>> proposed new features without being discussed on
>> > the
>> > >> > >> mailing
>> > >> > >> > >>>> >> list.
>> > >> > >> > >>>> >>>> Some
>> > >> > >> > >>>> >>>>>>>> of
>> > >> > >> > >>>> >>>>>>>>> these contributions were not accepted in the
>> end.
>> > In
>> > >> > other
>> > >> > >> > >>>> cases,
>> > >> > >> > >>>> >>>> pull
>> > >> > >> > >>>> >>>>>>>>> requests had to be heavily reworked because the
>> > >> > approach
>> > >> > >> > taken
>> > >> > >> > >>>> >> was
>> > >> > >> > >>>> >>>> not
>> > >> > >> > >>>> >>>>>>>> the
>> > >> > >> > >>>> >>>>>>>>> best one. These are situations which should be
>> > >> avoided
>> > >> > >> > because
>> > >> > >> > >>>> >> both
>> > >> > >> > >>>> >>>> the
>> > >> > >> > >>>> >>>>>>>>> contributor as well as the person who reviewed
>> the
>> > >> > >> > >>>> contribution
>> > >> > >> > >>>> >>>>>>> invested
>> > >> > >> > >>>> >>>>>>>> a
>> > >> > >> > >>>> >>>>>>>>> lot of time for nothing.
>> > >> > >> > >>>> >>>>>>>>>
>> > >> > >> > >>>> >>>>>>>>> I had a look at our “How to contribute” and
>> > “Coding
>> > >> > >> > guideline”
>> > >> > >> > >>>> >> pages
>> > >> > >> > >>>> >>>>>>> and
>> > >> > >> > >>>> >>>>>>>>> think, we can improve them. I see basically two
>> > >> issues:
>> > >> > >> > >>>> >>>>>>>>>
>> > >> > >> > >>>> >>>>>>>>> 1. The documents do not explain how to propose
>> and
>> > >> > discuss
>> > >> > >> > new
>> > >> > >> > >>>> >>>>>>> features
>> > >> > >> > >>>> >>>>>>>>> and improvements.
>> > >> > >> > >>>> >>>>>>>>> 2. The documents are quite technical and the
>> > >> structure
>> > >> > >> could
>> > >> > >> > >>>> be
>> > >> > >> > >>>> >>>>>>>> improved,
>> > >> > >> > >>>> >>>>>>>>> IMO.
>> > >> > >> > >>>> >>>>>>>>>
>> > >> > >> > >>>> >>>>>>>>> I would like to improve these pages and propose
>> > the
>> > >> > >> > following
>> > >> > >> > >>>> >>>>>>> additions:
>> > >> > >> > >>>> >>>>>>>>>
>> > >> > >> > >>>> >>>>>>>>> 1. Request contributors and committers to start
>> > >> > >> discussions
>> > >> > >> > on
>> > >> > >> > >>>> >> the
>> > >> > >> > >>>> >>>>>>>>> mailing list for new features. This discussion
>> > should
>> > >> > help
>> > >> > >> > to
>> > >> > >> > >>>> >> figure
>> > >> > >> > >>>> >>>>>>> out
>> > >> > >> > >>>> >>>>>>>>> whether such a new feature is a good fit for
>> Flink
>> > >> and
>> > >> > >> give
>> > >> > >> > >>>> first
>> > >> > >> > >>>> >>>>>>>> pointers
>> > >> > >> > >>>> >>>>>>>>> for a design to implement it.
>> > >> > >> > >>>> >>>>>>>>> 2. Require contributors and committers to write
>> > >> design
>> > >> > >> > >>>> >> documents for
>> > >> > >> > >>>> >>>>>>>> all
>> > >> > >> > >>>> >>>>>>>>> new features and major improvements. These
>> > documents
>> > >> > >> should
>> > >> > >> > be
>> > >> > >> > >>>> >>>> attached
>> > >> > >> > >>>> >>>>>>>> to
>> > >> > >> > >>>> >>>>>>>>> a JIRA issue and follow a template which needs
>> to
>> > be
>> > >> > >> > defined.
>> > >> > >> > >>>> >>>>>>>>> 3. Extend the “Coding Style Guides” and add
>> > patterns
>> > >> > that
>> > >> > >> > are
>> > >> > >> > >>>> >>>>>>> commonly
>> > >> > >> > >>>> >>>>>>>>> remarked in pull requests.
>> > >> > >> > >>>> >>>>>>>>> 4. Restructure the current pages into three
>> > pages: a
>> > >> > >> general
>> > >> > >> > >>>> >> guide
>> > >> > >> > >>>> >>>>>>> for
>> > >> > >> > >>>> >>>>>>>>> contributions and two guides for how to
>> > contribute to
>> > >> > code
>> > >> > >> > and
>> > >> > >> > >>>> >>>> website
>> > >> > >> > >>>> >>>>>>>> with
>> > >> > >> > >>>> >>>>>>>>> all technical issues (repository, IDE setup,
>> build
>> > >> > system,
>> > >> > >> > >>>> etc.)
>> > >> > >> > >>>> >>>>>>>>>
>> > >> > >> > >>>> >>>>>>>>> Looking forward for your comments,
>> > >> > >> > >>>> >>>>>>>>> Fabian
>> > >> > >> > >>>> >>>>>>>>>
>> > >> > >> > >>>> >>>>>>>>
>> > >> > >> > >>>> >>>>>>>
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>>>
>> > >> > >> > >>>> >>
>> > >> > >> > >>>>
>> > >> > >> > >>>>
>> > >> > >> > >>>>
>> > >> > >> > >>>>
>> > >> > >> > >>>>
>> > >> > >> > >>>>
>> > >> > >> > >>>
>> > >> > >> > >>
>> > >> > >> > >
>> > >> > >> >
>> > >> > >>
>> > >> >
>> > >>
>> >
>>

[Fabian Hueske-2]

Max, you're right.
Not necessarily a local build, but a least "some" build to verify that the
code compiles and most tests pass.
I said local builds because this is the easiest way to check for somebody
not familiar with our setup.

I think it is a good idea to explicitly state the command to run: "mvn
clean verify".
This will help everybody not familiar with the setup and all others (e.g.,
Travis users) know how to run a build anyway.

Best, Fabian

2016-02-19 13:47 GMT+01:00 Maximilian Michels <[hidden email]>:

> +1 for the documentation check box.
>
> Are we requiring local builds? Travis builds are fine, right? So what
> about "Builds locally or on Travis"?
>
> Could we add more subpoints from the How to Contribute guide?
>
> [X] General
>   - JIRA issue associated
>   - Single PR per change
>   - Meaningful commit message
>
> [X] CodeStyle
>   - No unnecessary style changes
>   - Check Style passes
>
> [X] Documentation
>   - New documentation added
>   - Old documentation updated
>   - Javadocs for public methods
>
> [X] Tests
>    - Tests added or adapted
>    - Executed mvn verify or built on Travis
>
>
> Martin, do you want to move this discussion to a new thread and
> propose a template?
>
> Cheers,
> Max
>
> On Fri, Feb 19, 2016 at 10:39 AM, Fabian Hueske <[hidden email]> wrote:
> > Thanks Martin!
> >
> > can you add two more fields?
> >
> > - Builds locally (mvn clean verify)
> > - Documentation updated or not updates necessary
> >
> > Best, Fabian
> >
> > 2016-02-19 9:35 GMT+01:00 Martin Liesenberg <[hidden email]
> >:
> >
> >> Cool, if no one objects, I'll create a JIRA ticket and open a
> corresponding
> >> PR during the weekend.
> >>
> >> Best regards
> >> Martin
> >>
> >> On Thu, 18 Feb 2016, 17:36 Maximilian Michels <[hidden email]> wrote:
> >>
> >> > Hi Martin,
> >> >
> >> > Sounds like a good idea to me to create a checklist like this. It
> >> > would be a nice reminder for people who didn't read the
> >> > how-to-contribute section of the README :)
> >> >
> >> > Cheers,
> >> > Max
> >> >
> >> > On Thu, Feb 18, 2016 at 9:31 AM, Martin Liesenberg
> >> > <[hidden email]> wrote:
> >> > > Hi,
> >> > >
> >> > > GitHub just introduced a way to supply PR templates. [1]
> >> > >
> >> > > To support the changes discussed here, we could add a simple
> template
> >> > with
> >> > > check boxes like:
> >> > > [ ] did you add tests
> >> > > [ ] did you check against the coding guidelines
> >> > > [ ] is there a jira supporting the PR
> >> > >
> >> > > Let me know what you think. The language/tone probably needs a bit
> of
> >> > > refinement.
> >> > >
> >> > > best regards
> >> > > martin
> >> > >
> >> > > [1] https://github.com/blog/2111-issue-and-pull-request-templates
> >> > >
> >> > > Till Rohrmann <[hidden email]> schrieb am Do., 15. Okt. 2015
> um
> >> > > 11:58 Uhr:
> >> > >
> >> > >> Thanks for leading the effort Fabian!
> >> > >>
> >> > >> On Fri, Oct 9, 2015 at 10:07 AM, Maximilian Michels <
> [hidden email]>
> >> > >> wrote:
> >> > >>
> >> > >> > Very nice work, Fabian. I think we'll have to send around a
> reminder
> >> > >> > from time to time and, perhaps, evaluate the new guidelines after
> >> some
> >> > >> > period of time. It's great to have these documents now as a
> >> reference.
> >> > >> >
> >> > >> > On Thu, Oct 8, 2015 at 5:36 PM, Stephan Ewen <[hidden email]>
> >> > wrote:
> >> > >> > > Great, thanks Fabian!
> >> > >> > >
> >> > >> > > On Thu, Oct 8, 2015 at 5:28 PM, Henry Saputra <
> >> > [hidden email]
> >> > >> >
> >> > >> > > wrote:
> >> > >> > >
> >> > >> > >> Thanks again for leading this effort, Fabian
> >> > >> > >>
> >> > >> > >> - Henry
> >> > >> > >>
> >> > >> > >> On Thursday, October 8, 2015, Fabian Hueske <
> [hidden email]>
> >> > >> wrote:
> >> > >> > >>
> >> > >> > >> > Hi everybody,
> >> > >> > >> >
> >> > >> > >> > I merged our new contribution guidelines a few minutes ago.
> >> > >> > >> >
> >> > >> > >> > I'd like to emphasize that these rules do not have any
> effect,
> >> if
> >> > >> > nobody
> >> > >> > >> > follows them.
> >> > >> > >> > So please follow our contribution rules and make others
> aware
> >> of
> >> > >> them
> >> > >> > as
> >> > >> > >> > well.
> >> > >> > >> >
> >> > >> > >> > Specifically
> >> > >> > >> > - pay attention that all PRs are backed by a JIRA and ask to
> >> > create
> >> > >> a
> >> > >> > >> JIRA
> >> > >> > >> > if that is not the case
> >> > >> > >> > - early discuss whether a feature request is valid (before
> code
> >> > is
> >> > >> > >> > contributed) to avoid frustrating late rejections of PRs.
> >> > >> > >> > - request, provide, and discuss design docs for sensible
> >> > >> > contributions to
> >> > >> > >> > avoid major redesigns / rejections of PRs.
> >> > >> > >> >
> >> > >> > >> > Thank you,
> >> > >> > >> > Fabian
> >> > >> > >> >
> >> > >> > >> > 2015-10-07 10:16 GMT+02:00 Fabian Hueske <[hidden email]
> >> > >> > >> <javascript:;>
> >> > >> > >> > >:
> >> > >> > >> >
> >> > >> > >> > > Thanks for the feedback everybody.
> >> > >> > >> > > I updated the PR and would like to merge it later today if
> >> > there
> >> > >> > are no
> >> > >> > >> > > more comments.
> >> > >> > >> > >
> >> > >> > >> > > Cheers, Fabian
> >> > >> > >> > >
> >> > >> > >> > >
> >> > >> > >> > > 2015-10-05 14:09 GMT+02:00 Fabian Hueske <
> [hidden email]
> >> > >> > >> > <javascript:;>>:
> >> > >> > >> > >
> >> > >> > >> > >> Hi,
> >> > >> > >> > >>
> >> > >> > >> > >> I opened a PR with the discussed changes [1].
> >> > >> > >> > >> Please review, give feedback, and suggest changes.
> >> > >> > >> > >>
> >> > >> > >> > >> Cheers, Fabian
> >> > >> > >> > >>
> >> > >> > >> > >> [1] https://github.com/apache/flink-web/pull/11
> >> > >> > >> > >>
> >> > >> > >> > >>
> >> > >> > >> > >> 2015-09-28 18:02 GMT+02:00 Fabian Hueske <
> [hidden email]
> >> > >> > >> > <javascript:;>>:
> >> > >> > >> > >>
> >> > >> > >> > >>> @Chiwan, sure. Will do that. Thanks for pointing it out
> :-)
> >> > >> > >> > >>>
> >> > >> > >> > >>> 2015-09-28 18:00 GMT+02:00 Chiwan Park <
> >> > [hidden email]
> >> > >> > >> > <javascript:;>>:
> >> > >> > >> > >>>
> >> > >> > >> > >>>> @Fabian, Could you cover FLINK-2712 in your pull
> request?
> >> I
> >> > >> think
> >> > >> > >> that
> >> > >> > >> > >>>> it would be better than split pull request.
> >> > >> > >> > >>>>
> >> > >> > >> > >>>> Regards,
> >> > >> > >> > >>>> Chiwan Park
> >> > >> > >> > >>>>
> >> > >> > >> > >>>> > On Sep 28, 2015, at 4:51 PM, Fabian Hueske <
> >> > >> [hidden email]
> >> > >> > >> > <javascript:;>> wrote:
> >> > >> > >> > >>>> >
> >> > >> > >> > >>>> > Thanks everybody for the discussion.
> >> > >> > >> > >>>> > I'll prepare a pull request to update the "How to
> >> > contribute"
> >> > >> > and
> >> > >> > >> > >>>> "Coding
> >> > >> > >> > >>>> > Guidelines".
> >> > >> > >> > >>>> >
> >> > >> > >> > >>>> > Thanks,
> >> > >> > >> > >>>> > Fabian
> >> > >> > >> > >>>> >
> >> > >> > >> > >>>> > 2015-09-26 9:06 GMT+02:00 Maximilian Michels <
> >> > [hidden email]
> >> > >> > >> > <javascript:;>>:
> >> > >> > >> > >>>> >
> >> > >> > >> > >>>> >> Hi Fabian,
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> This is a very important topic. Thanks for starting
> the
> >> > >> > >> discussion.
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> 1) JIRA discussion
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> Absolutely. No new feature should be introduced
> >> without a
> >> > >> > >> > discussion.
> >> > >> > >> > >>>> >> Frankly, I see the problem that sometimes
> discussions
> >> > only
> >> > >> > come
> >> > >> > >> up
> >> > >> > >> > >>>> >> when the pull request has been opened. However, this
> >> can
> >> > be
> >> > >> > >> > overcome
> >> > >> > >> > >>>> >> by the design document.
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> 2) Design document
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> +1 for the document. It increases transparency but
> also
> >> > >> helps
> >> > >> > the
> >> > >> > >> > >>>> >> contributor to think his idea through before
> starting
> >> to
> >> > >> code.
> >> > >> > >> The
> >> > >> > >> > >>>> >> document could also be written directly in JIRA.
> That
> >> > way,
> >> > >> it
> >> > >> > is
> >> > >> > >> > more
> >> > >> > >> > >>>> >> accessible. JIRA offers mark up; even images can be
> >> > attached
> >> > >> > and
> >> > >> > >> > >>>> >> displayed in the JIRA description.
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> I'd like to propose another section "Limitations"
> for
> >> the
> >> > >> > design
> >> > >> > >> > >>>> >> document. Breaking API changes should also be listed
> >> on a
> >> > >> > special
> >> > >> > >> > >>>> Wiki
> >> > >> > >> > >>>> >> page.
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> 3) Coding style
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> In addition to updating the document, do we want to
> >> > enforce
> >> > >> > >> coding
> >> > >> > >> > >>>> >> styles also by adding new Maven Checkstyle rules?
> IMHO
> >> > >> strict
> >> > >> > >> rules
> >> > >> > >> > >>>> >> could cause more annoyances than they actually
> >> > contribute to
> >> > >> > the
> >> > >> > >> > >>>> >> readability of the code. Perhaps this should be
> >> discussed
> >> > >> in a
> >> > >> > >> > >>>> >> separate thread.
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> +1 for collecting common problems and design
> patterns
> >> to
> >> > >> > include
> >> > >> > >> > them
> >> > >> > >> > >>>> >> in the document. I was thinking, that we should also
> >> > cover
> >> > >> > some
> >> > >> > >> of
> >> > >> > >> > >>>> the
> >> > >> > >> > >>>> >> features of tools and dependencies we heavily use,
> e.g.
> >> > >> > Travis,
> >> > >> > >> > >>>> >> Mockito, Guava, Log4j, FlinkMiniCluster, Unit
> testing
> >> vs
> >> > IT
> >> > >> > >> cases,
> >> > >> > >> > >>>> >> etc.
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> 4 ) Restructuring the how to contribute guide
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> Good idea to have a meta document that explains how
> >> > >> > contributing
> >> > >> > >> > >>>> works
> >> > >> > >> > >>>> >> in general, and another document for technical
> things.
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> Cheers,
> >> > >> > >> > >>>> >> Max
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>> >> On Thu, Sep 24, 2015 at 2:53 PM, Fabian Hueske <
> >> > >> > >> [hidden email]
> >> > >> > >> > <javascript:;>>
> >> > >> > >> > >>>> wrote:
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> Thanks everybody for feedback and comments.
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> Regarding 1) and 2):
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> I like the idea of keeping the discussion of new
> >> > features
> >> > >> and
> >> > >> > >> > >>>> >> improvements
> >> > >> > >> > >>>> >>> in JIRA as Kostas proposed.
> >> > >> > >> > >>>> >>> Our coding guidelines [1] already request a JIRA
> issue
> >> > for
> >> > >> > each
> >> > >> > >> > pull
> >> > >> > >> > >>>> >>> request.
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> How about we highlight this requirement more
> >> prominently
> >> > >> and
> >> > >> > >> > follow
> >> > >> > >> > >>>> this
> >> > >> > >> > >>>> >>> rule more strict from now on.
> >> > >> > >> > >>>> >>> JIRA issues for new features and improvements
> should
> >> > >> clearly
> >> > >> > >> > >>>> specify the
> >> > >> > >> > >>>> >>> scope and requirements for the new feature /
> >> > improvement.
> >> > >> > >> > >>>> >>> The level of detail is up to the reporter of the
> >> issue,
> >> > but
> >> > >> > the
> >> > >> > >> > >>>> community
> >> > >> > >> > >>>> >>> can request more detail or change the scope and
> >> > >> requirements
> >> > >> > by
> >> > >> > >> > >>>> >> discussion.
> >> > >> > >> > >>>> >>> When a JIRA issue for a new feature or improvement
> is
> >> > >> opened,
> >> > >> > >> the
> >> > >> > >> > >>>> >> community
> >> > >> > >> > >>>> >>> can start a discussion whether the feature is
> >> desirable
> >> > for
> >> > >> > >> Flink
> >> > >> > >> > >>>> or not.
> >> > >> > >> > >>>> >>> Any contributor (including the reporter) can also
> >> > attach a
> >> > >> > >> > >>>> >>> "design-doc-requested" label to the issue. A design
> >> > >> document
> >> > >> > can
> >> > >> > >> > be
> >> > >> > >> > >>>> >>> proposed by anybody, including the reporter or
> >> assignee
> >> > of
> >> > >> > the
> >> > >> > >> > JIRA
> >> > >> > >> > >>>> >> issue.
> >> > >> > >> > >>>> >>> However, the issue cannot be resolved and a
> >> > corresponding
> >> > >> PR
> >> > >> > not
> >> > >> > >> > be
> >> > >> > >> > >>>> >> merged
> >> > >> > >> > >>>> >>> before a design document has been accepted by lazy
> >> > >> consensus.
> >> > >> > >> > >>>> Hence, an
> >> > >> > >> > >>>> >>> assignee should propose a design doc before
> starting
> >> to
> >> > >> code
> >> > >> > to
> >> > >> > >> > >>>> avoid
> >> > >> > >> > >>>> >> major
> >> > >> > >> > >>>> >>> redesigns of the implementation.
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> This way it is up to the community when to start a
> >> > >> discussion
> >> > >> > >> > about
> >> > >> > >> > >>>> >> whether
> >> > >> > >> > >>>> >>> a feature request is accepted or to request a
> design
> >> > >> > document.
> >> > >> > >> We
> >> > >> > >> > >>>> can
> >> > >> > >> > >>>> >> make
> >> > >> > >> > >>>> >>> design documents mandatory for changes that touch
> the
> >> > >> public
> >> > >> > >> API.
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> Regarding 3):
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> I agree with Vasia, that we should collect
> suggestions
> >> > for
> >> > >> > >> common
> >> > >> > >> > >>>> >> patterns
> >> > >> > >> > >>>> >>> and also continuously update the coding guidelines.
> >> > >> > >> > >>>> >>> @Henry, I had best practices (exception handling,
> >> tests,
> >> > >> > etc.)
> >> > >> > >> in
> >> > >> > >> > >>>> mind.
> >> > >> > >> > >>>> >>> Syntactic code style is important as well, but we
> >> should
> >> > >> > have a
> >> > >> > >> > >>>> separate
> >> > >> > >> > >>>> >>> discussion about that, IMO.
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> Proposal for a design document template:
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> - Overview of general approach
> >> > >> > >> > >>>> >>> - API changes (changed interfaces, new / deprecated
> >> > >> > >> configuration
> >> > >> > >> > >>>> >>> parameters, changed behavior)
> >> > >> > >> > >>>> >>> - Main components and classes to touch
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> Cheers,
> >> > >> > >> > >>>> >>> Fabian
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> [1] http://flink.apache.org/coding-guidelines.html
> >> > >> > >> > >>>> >>> <http://flink.apache.org/coding-guidelines.html>
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>> 2015-09-24 10:52 GMT+02:00 Chiwan Park <
> >> > >> > [hidden email]
> >> > >> > >> > <javascript:;>>:
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>>> Thanks Fabian for starting the discussion.
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>> +1 for overall approach.
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>> About (1), expressing that consensus must be
> required
> >> > for
> >> > >> > new
> >> > >> > >> > >>>> feature
> >> > >> > >> > >>>> >> in
> >> > >> > >> > >>>> >>>> “How to contribute” page is very nice. Some pull
> >> > requests
> >> > >> > were
> >> > >> > >> > sent
> >> > >> > >> > >>>> >> without
> >> > >> > >> > >>>> >>>> consensus. The contributors had to rewrote their
> pull
> >> > >> > requests.
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>> Agree with (2), (3) and (4).
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>> Regards,
> >> > >> > >> > >>>> >>>> Chiwan Park
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>>> On Sep 24, 2015, at 2:23 AM, Henry Saputra <
> >> > >> > >> > >>>> [hidden email] <javascript:;>>
> >> > >> > >> > >>>> >>>> wrote:
> >> > >> > >> > >>>> >>>>>
> >> > >> > >> > >>>> >>>>> Thanks again, Fabian for starting the
> discussions.
> >> > >> > >> > >>>> >>>>>
> >> > >> > >> > >>>> >>>>> For (1) and (2) I think it is good idea and will
> >> help
> >> > >> > people
> >> > >> > >> to
> >> > >> > >> > >>>> >>>>> understand and follow the author thought process.
> >> > >> > >> > >>>> >>>>> Following up with Stephan's reply, some new
> features
> >> > >> > solutions
> >> > >> > >> > >>>> could
> >> > >> > >> > >>>> >>>>> be explained thoroughly in the PR descriptions
> but
> >> > some
> >> > >> > >> requires
> >> > >> > >> > >>>> >>>>> additional reviews of the proposed design.
> >> > >> > >> > >>>> >>>>> I like the idea of using tag in JIRA whether new
> >> > features
> >> > >> > >> should
> >> > >> > >> > >>>> or
> >> > >> > >> > >>>> >>>>> should not being accompanied by design document.
> >> > >> > >> > >>>> >>>>>
> >> > >> > >> > >>>> >>>>> Agree with (3) and (4).
> >> > >> > >> > >>>> >>>>> As for (3) are you thinking about more of style
> of
> >> > code
> >> > >> > syntax
> >> > >> > >> > via
> >> > >> > >> > >>>> >>>>> checkstyle updates, or best practices in term of
> no
> >> > >> mutable
> >> > >> > >> > state
> >> > >> > >> > >>>> if
> >> > >> > >> > >>>> >>>>> possible, throw precise Exception if possible for
> >> > >> > interfaces,
> >> > >> > >> > >>>> etc. ?
> >> > >> > >> > >>>> >>>>>
> >> > >> > >> > >>>> >>>>> - Henry
> >> > >> > >> > >>>> >>>>>
> >> > >> > >> > >>>> >>>>>
> >> > >> > >> > >>>> >>>>>
> >> > >> > >> > >>>> >>>>>
> >> > >> > >> > >>>> >>>>> On Wed, Sep 23, 2015 at 9:31 AM, Stephan Ewen <
> >> > >> > >> [hidden email]
> >> > >> > >> > <javascript:;>>
> >> > >> > >> > >>>> >> wrote:
> >> > >> > >> > >>>> >>>>>> Thanks, Fabian for driving this!
> >> > >> > >> > >>>> >>>>>>
> >> > >> > >> > >>>> >>>>>> I agree with your points.
> >> > >> > >> > >>>> >>>>>>
> >> > >> > >> > >>>> >>>>>> Concerning Vasia's comment to not raise the bar
> too
> >> > >> high:
> >> > >> > >> > >>>> >>>>>> That is true, the requirements should be
> >> reasonable.
> >> > We
> >> > >> > can
> >> > >> > >> > >>>> >> definitely
> >> > >> > >> > >>>> >>>> tag
> >> > >> > >> > >>>> >>>>>> issues as "simple" which means they do not
> require
> >> a
> >> > >> > design
> >> > >> > >> > >>>> >> document.
> >> > >> > >> > >>>> >>>> That
> >> > >> > >> > >>>> >>>>>> should be more for new features and needs not be
> >> very
> >> > >> > >> detailed.
> >> > >> > >> > >>>> >>>>>>
> >> > >> > >> > >>>> >>>>>> We could also make the inverse, meaning we
> >> explicitly
> >> > >> tag
> >> > >> > >> > certain
> >> > >> > >> > >>>> >>>> issues as
> >> > >> > >> > >>>> >>>>>> "requires design document".
> >> > >> > >> > >>>> >>>>>>
> >> > >> > >> > >>>> >>>>>> Greetings,
> >> > >> > >> > >>>> >>>>>> Stephan
> >> > >> > >> > >>>> >>>>>>
> >> > >> > >> > >>>> >>>>>>
> >> > >> > >> > >>>> >>>>>>
> >> > >> > >> > >>>> >>>>>>
> >> > >> > >> > >>>> >>>>>> On Wed, Sep 23, 2015 at 5:05 PM, Vasiliki
> Kalavri <
> >> > >> > >> > >>>> >>>> [hidden email] <javascript:;>
> >> > >> > >> > >>>> >>>>>>> wrote:
> >> > >> > >> > >>>> >>>>>>
> >> > >> > >> > >>>> >>>>>>> Hi,
> >> > >> > >> > >>>> >>>>>>>
> >> > >> > >> > >>>> >>>>>>> I agree with you Fabian. Clarifying these
> issues
> >> in
> >> > the
> >> > >> > "How
> >> > >> > >> > to
> >> > >> > >> > >>>> >>>> Contribute"
> >> > >> > >> > >>>> >>>>>>> guide will save lots of time both to reviewers
> and
> >> > >> > >> > contributors.
> >> > >> > >> > >>>> >> It is
> >> > >> > >> > >>>> >>>> a
> >> > >> > >> > >>>> >>>>>>> really disappointing situation when someone
> spends
> >> > time
> >> > >> > >> > >>>> >> implementing
> >> > >> > >> > >>>> >>>>>>> something and their PR ends up being rejected
> >> > because
> >> > >> > either
> >> > >> > >> > the
> >> > >> > >> > >>>> >>>> feature
> >> > >> > >> > >>>> >>>>>>> was not needed or the implementation details
> were
> >> > never
> >> > >> > >> agreed
> >> > >> > >> > >>>> on.
> >> > >> > >> > >>>> >>>>>>>
> >> > >> > >> > >>>> >>>>>>> That said, I think we should also make sure
> that
> >> we
> >> > >> don't
> >> > >> > >> > raise
> >> > >> > >> > >>>> the
> >> > >> > >> > >>>> >>>> bar too
> >> > >> > >> > >>>> >>>>>>> high for simple contributions.
> >> > >> > >> > >>>> >>>>>>>
> >> > >> > >> > >>>> >>>>>>> Regarding (1) and (2), I think we should
> clarify
> >> > what
> >> > >> > kind
> >> > >> > >> of
> >> > >> > >> > >>>> >>>>>>> additions/changes require this process to be
> >> > followed.
> >> > >> > e.g.
> >> > >> > >> do
> >> > >> > >> > >>>> we
> >> > >> > >> > >>>> >> need
> >> > >> > >> > >>>> >>>> to
> >> > >> > >> > >>>> >>>>>>> discuss additions for which JIRAs already
> exist?
> >> > Ideas
> >> > >> > >> > described
> >> > >> > >> > >>>> >> in the
> >> > >> > >> > >>>> >>>>>>> roadmaps? Adding a new algorithm to
> >> Gelly/Flink-ML?
> >> > >> > >> > >>>> >>>>>>>
> >> > >> > >> > >>>> >>>>>>> Regarding (3), maybe we can all suggest some
> >> > >> > >> examples/patterns
> >> > >> > >> > >>>> that
> >> > >> > >> > >>>> >>>> we've
> >> > >> > >> > >>>> >>>>>>> seen when reviewing PRs and then choose the
> most
> >> > common
> >> > >> > (or
> >> > >> > >> > >>>> all).
> >> > >> > >> > >>>> >>>>>>>
> >> > >> > >> > >>>> >>>>>>> (4) sounds good to me.
> >> > >> > >> > >>>> >>>>>>>
> >> > >> > >> > >>>> >>>>>>> Cheers,
> >> > >> > >> > >>>> >>>>>>> Vasia.
> >> > >> > >> > >>>> >>>>>>>
> >> > >> > >> > >>>> >>>>>>> On 23 September 2015 at 15:08, Kostas Tzoumas <
> >> > >> > >> > >>>> [hidden email] <javascript:;>
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>>> wrote:
> >> > >> > >> > >>>> >>>>>>>
> >> > >> > >> > >>>> >>>>>>>> Big +1.
> >> > >> > >> > >>>> >>>>>>>>
> >> > >> > >> > >>>> >>>>>>>> For (1), a discussion in JIRA would also be an
> >> > option
> >> > >> > IMO
> >> > >> > >> > >>>> >>>>>>>>
> >> > >> > >> > >>>> >>>>>>>> For (2), let us come up with few examples on
> what
> >> > >> > >> > constitutes a
> >> > >> > >> > >>>> >>>> feature
> >> > >> > >> > >>>> >>>>>>>> that needs a design doc, and what should be in
> >> the
> >> > doc
> >> > >> > (IMO
> >> > >> > >> > >>>> >>>>>>>> architecture/general approach, components
> >> touched,
> >> > >> > >> interfaces
> >> > >> > >> > >>>> >> changed)
> >> > >> > >> > >>>> >>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>
> >> > >> > >> > >>>> >>>>>>>> On Wed, Sep 23, 2015 at 2:24 PM, Fabian
> Hueske <
> >> > >> > >> > >>>> [hidden email] <javascript:;>
> >> > >> > >> > >>>> >>>
> >> > >> > >> > >>>> >>>>>>> wrote:
> >> > >> > >> > >>>> >>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>> Hi everybody,
> >> > >> > >> > >>>> >>>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>> I guess we all have noticed that the Flink
> >> > community
> >> > >> is
> >> > >> > >> > >>>> quickly
> >> > >> > >> > >>>> >>>> growing
> >> > >> > >> > >>>> >>>>>>>> and
> >> > >> > >> > >>>> >>>>>>>>> more and more contributions are coming in.
> >> > Recently,
> >> > >> a
> >> > >> > few
> >> > >> > >> > >>>> >>>>>>> contributions
> >> > >> > >> > >>>> >>>>>>>>> proposed new features without being
> discussed on
> >> > the
> >> > >> > >> mailing
> >> > >> > >> > >>>> >> list.
> >> > >> > >> > >>>> >>>> Some
> >> > >> > >> > >>>> >>>>>>>> of
> >> > >> > >> > >>>> >>>>>>>>> these contributions were not accepted in the
> >> end.
> >> > In
> >> > >> > other
> >> > >> > >> > >>>> cases,
> >> > >> > >> > >>>> >>>> pull
> >> > >> > >> > >>>> >>>>>>>>> requests had to be heavily reworked because
> the
> >> > >> > approach
> >> > >> > >> > taken
> >> > >> > >> > >>>> >> was
> >> > >> > >> > >>>> >>>> not
> >> > >> > >> > >>>> >>>>>>>> the
> >> > >> > >> > >>>> >>>>>>>>> best one. These are situations which should
> be
> >> > >> avoided
> >> > >> > >> > because
> >> > >> > >> > >>>> >> both
> >> > >> > >> > >>>> >>>> the
> >> > >> > >> > >>>> >>>>>>>>> contributor as well as the person who
> reviewed
> >> the
> >> > >> > >> > >>>> contribution
> >> > >> > >> > >>>> >>>>>>> invested
> >> > >> > >> > >>>> >>>>>>>> a
> >> > >> > >> > >>>> >>>>>>>>> lot of time for nothing.
> >> > >> > >> > >>>> >>>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>> I had a look at our “How to contribute” and
> >> > “Coding
> >> > >> > >> > guideline”
> >> > >> > >> > >>>> >> pages
> >> > >> > >> > >>>> >>>>>>> and
> >> > >> > >> > >>>> >>>>>>>>> think, we can improve them. I see basically
> two
> >> > >> issues:
> >> > >> > >> > >>>> >>>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>> 1. The documents do not explain how to
> propose
> >> and
> >> > >> > discuss
> >> > >> > >> > new
> >> > >> > >> > >>>> >>>>>>> features
> >> > >> > >> > >>>> >>>>>>>>> and improvements.
> >> > >> > >> > >>>> >>>>>>>>> 2. The documents are quite technical and the
> >> > >> structure
> >> > >> > >> could
> >> > >> > >> > >>>> be
> >> > >> > >> > >>>> >>>>>>>> improved,
> >> > >> > >> > >>>> >>>>>>>>> IMO.
> >> > >> > >> > >>>> >>>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>> I would like to improve these pages and
> propose
> >> > the
> >> > >> > >> > following
> >> > >> > >> > >>>> >>>>>>> additions:
> >> > >> > >> > >>>> >>>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>> 1. Request contributors and committers to
> start
> >> > >> > >> discussions
> >> > >> > >> > on
> >> > >> > >> > >>>> >> the
> >> > >> > >> > >>>> >>>>>>>>> mailing list for new features. This
> discussion
> >> > should
> >> > >> > help
> >> > >> > >> > to
> >> > >> > >> > >>>> >> figure
> >> > >> > >> > >>>> >>>>>>> out
> >> > >> > >> > >>>> >>>>>>>>> whether such a new feature is a good fit for
> >> Flink
> >> > >> and
> >> > >> > >> give
> >> > >> > >> > >>>> first
> >> > >> > >> > >>>> >>>>>>>> pointers
> >> > >> > >> > >>>> >>>>>>>>> for a design to implement it.
> >> > >> > >> > >>>> >>>>>>>>> 2. Require contributors and committers to
> write
> >> > >> design
> >> > >> > >> > >>>> >> documents for
> >> > >> > >> > >>>> >>>>>>>> all
> >> > >> > >> > >>>> >>>>>>>>> new features and major improvements. These
> >> > documents
> >> > >> > >> should
> >> > >> > >> > be
> >> > >> > >> > >>>> >>>> attached
> >> > >> > >> > >>>> >>>>>>>> to
> >> > >> > >> > >>>> >>>>>>>>> a JIRA issue and follow a template which
> needs
> >> to
> >> > be
> >> > >> > >> > defined.
> >> > >> > >> > >>>> >>>>>>>>> 3. Extend the “Coding Style Guides” and add
> >> > patterns
> >> > >> > that
> >> > >> > >> > are
> >> > >> > >> > >>>> >>>>>>> commonly
> >> > >> > >> > >>>> >>>>>>>>> remarked in pull requests.
> >> > >> > >> > >>>> >>>>>>>>> 4. Restructure the current pages into three
> >> > pages: a
> >> > >> > >> general
> >> > >> > >> > >>>> >> guide
> >> > >> > >> > >>>> >>>>>>> for
> >> > >> > >> > >>>> >>>>>>>>> contributions and two guides for how to
> >> > contribute to
> >> > >> > code
> >> > >> > >> > and
> >> > >> > >> > >>>> >>>> website
> >> > >> > >> > >>>> >>>>>>>> with
> >> > >> > >> > >>>> >>>>>>>>> all technical issues (repository, IDE setup,
> >> build
> >> > >> > system,
> >> > >> > >> > >>>> etc.)
> >> > >> > >> > >>>> >>>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>> Looking forward for your comments,
> >> > >> > >> > >>>> >>>>>>>>> Fabian
> >> > >> > >> > >>>> >>>>>>>>>
> >> > >> > >> > >>>> >>>>>>>>
> >> > >> > >> > >>>> >>>>>>>
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>>>
> >> > >> > >> > >>>> >>
> >> > >> > >> > >>>>
> >> > >> > >> > >>>>
> >> > >> > >> > >>>>
> >> > >> > >> > >>>>
> >> > >> > >> > >>>>
> >> > >> > >> > >>>>
> >> > >> > >> > >>>
> >> > >> > >> > >>
> >> > >> > >> > >
> >> > >> > >> >
> >> > >> > >>
> >> > >> >
> >> > >>
> >> >
> >>
>

[Henry Saputra]

+1 for slight addition from Max.

Travis exist for helping to run all tests not in your local dev.

On Friday, February 19, 2016, Fabian Hueske <[hidden email]> wrote:

> Max, you're right.
> Not necessarily a local build, but a least "some" build to verify that the
> code compiles and most tests pass.
> I said local builds because this is the easiest way to check for somebody
> not familiar with our setup.
>
> I think it is a good idea to explicitly state the command to run: "mvn
> clean verify".
> This will help everybody not familiar with the setup and all others (e.g.,
> Travis users) know how to run a build anyway.
>
> Best, Fabian
>
> 2016-02-19 13:47 GMT+01:00 Maximilian Michels <[hidden email]
> <javascript:;>>:
>
> > +1 for the documentation check box.
> >
> > Are we requiring local builds? Travis builds are fine, right? So what
> > about "Builds locally or on Travis"?
> >
> > Could we add more subpoints from the How to Contribute guide?
> >
> > [X] General
> >   - JIRA issue associated
> >   - Single PR per change
> >   - Meaningful commit message
> >
> > [X] CodeStyle
> >   - No unnecessary style changes
> >   - Check Style passes
> >
> > [X] Documentation
> >   - New documentation added
> >   - Old documentation updated
> >   - Javadocs for public methods
> >
> > [X] Tests
> >    - Tests added or adapted
> >    - Executed mvn verify or built on Travis
> >
> >
> > Martin, do you want to move this discussion to a new thread and
> > propose a template?
> >
> > Cheers,
> > Max
> >
> > On Fri, Feb 19, 2016 at 10:39 AM, Fabian Hueske <[hidden email]
> <javascript:;>> wrote:
> > > Thanks Martin!
> > >
> > > can you add two more fields?
> > >
> > > - Builds locally (mvn clean verify)
> > > - Documentation updated or not updates necessary
> > >
> > > Best, Fabian
> > >
> > > 2016-02-19 9:35 GMT+01:00 Martin Liesenberg <
> [hidden email] <javascript:;>
> > >:
> > >
> > >> Cool, if no one objects, I'll create a JIRA ticket and open a
> > corresponding
> > >> PR during the weekend.
> > >>
> > >> Best regards
> > >> Martin
> > >>
> > >> On Thu, 18 Feb 2016, 17:36 Maximilian Michels <[hidden email]
> <javascript:;>> wrote:
> > >>
> > >> > Hi Martin,
> > >> >
> > >> > Sounds like a good idea to me to create a checklist like this. It
> > >> > would be a nice reminder for people who didn't read the
> > >> > how-to-contribute section of the README :)
> > >> >
> > >> > Cheers,
> > >> > Max
> > >> >
> > >> > On Thu, Feb 18, 2016 at 9:31 AM, Martin Liesenberg
> > >> > <[hidden email] <javascript:;>> wrote:
> > >> > > Hi,
> > >> > >
> > >> > > GitHub just introduced a way to supply PR templates. [1]
> > >> > >
> > >> > > To support the changes discussed here, we could add a simple
> > template
> > >> > with
> > >> > > check boxes like:
> > >> > > [ ] did you add tests
> > >> > > [ ] did you check against the coding guidelines
> > >> > > [ ] is there a jira supporting the PR
> > >> > >
> > >> > > Let me know what you think. The language/tone probably needs a bit
> > of
> > >> > > refinement.
> > >> > >
> > >> > > best regards
> > >> > > martin
> > >> > >
> > >> > > [1] https://github.com/blog/2111-issue-and-pull-request-templates
> > >> > >
> > >> > > Till Rohrmann <[hidden email] <javascript:;>> schrieb am
> Do., 15. Okt. 2015
> > um
> > >> > > 11:58 Uhr:
> > >> > >
> > >> > >> Thanks for leading the effort Fabian!
> > >> > >>
> > >> > >> On Fri, Oct 9, 2015 at 10:07 AM, Maximilian Michels <
> > [hidden email] <javascript:;>>
> > >> > >> wrote:
> > >> > >>
> > >> > >> > Very nice work, Fabian. I think we'll have to send around a
> > reminder
> > >> > >> > from time to time and, perhaps, evaluate the new guidelines
> after
> > >> some
> > >> > >> > period of time. It's great to have these documents now as a
> > >> reference.
> > >> > >> >
> > >> > >> > On Thu, Oct 8, 2015 at 5:36 PM, Stephan Ewen <[hidden email]
> <javascript:;>>
> > >> > wrote:
> > >> > >> > > Great, thanks Fabian!
> > >> > >> > >
> > >> > >> > > On Thu, Oct 8, 2015 at 5:28 PM, Henry Saputra <
> > >> > [hidden email] <javascript:;>
> > >> > >> >
> > >> > >> > > wrote:
> > >> > >> > >
> > >> > >> > >> Thanks again for leading this effort, Fabian
> > >> > >> > >>
> > >> > >> > >> - Henry
> > >> > >> > >>
> > >> > >> > >> On Thursday, October 8, 2015, Fabian Hueske <
> > [hidden email] <javascript:;>>
> > >> > >> wrote:
> > >> > >> > >>
> > >> > >> > >> > Hi everybody,
> > >> > >> > >> >
> > >> > >> > >> > I merged our new contribution guidelines a few minutes
> ago.
> > >> > >> > >> >
> > >> > >> > >> > I'd like to emphasize that these rules do not have any
> > effect,
> > >> if
> > >> > >> > nobody
> > >> > >> > >> > follows them.
> > >> > >> > >> > So please follow our contribution rules and make others
> > aware
> > >> of
> > >> > >> them
> > >> > >> > as
> > >> > >> > >> > well.
> > >> > >> > >> >
> > >> > >> > >> > Specifically
> > >> > >> > >> > - pay attention that all PRs are backed by a JIRA and ask
> to
> > >> > create
> > >> > >> a
> > >> > >> > >> JIRA
> > >> > >> > >> > if that is not the case
> > >> > >> > >> > - early discuss whether a feature request is valid (before
> > code
> > >> > is
> > >> > >> > >> > contributed) to avoid frustrating late rejections of PRs.
> > >> > >> > >> > - request, provide, and discuss design docs for sensible
> > >> > >> > contributions to
> > >> > >> > >> > avoid major redesigns / rejections of PRs.
> > >> > >> > >> >
> > >> > >> > >> > Thank you,
> > >> > >> > >> > Fabian
> > >> > >> > >> >
> > >> > >> > >> > 2015-10-07 10:16 GMT+02:00 Fabian Hueske <
> [hidden email] <javascript:;>
> > >> > >> > >> <javascript:;>
> > >> > >> > >> > >:
> > >> > >> > >> >
> > >> > >> > >> > > Thanks for the feedback everybody.
> > >> > >> > >> > > I updated the PR and would like to merge it later today
> if
> > >> > there
> > >> > >> > are no
> > >> > >> > >> > > more comments.
> > >> > >> > >> > >
> > >> > >> > >> > > Cheers, Fabian
> > >> > >> > >> > >
> > >> > >> > >> > >
> > >> > >> > >> > > 2015-10-05 14:09 GMT+02:00 Fabian Hueske <
> > [hidden email] <javascript:;>
> > >> > >> > >> > <javascript:;>>:
> > >> > >> > >> > >
> > >> > >> > >> > >> Hi,
> > >> > >> > >> > >>
> > >> > >> > >> > >> I opened a PR with the discussed changes [1].
> > >> > >> > >> > >> Please review, give feedback, and suggest changes.
> > >> > >> > >> > >>
> > >> > >> > >> > >> Cheers, Fabian
> > >> > >> > >> > >>
> > >> > >> > >> > >> [1] https://github.com/apache/flink-web/pull/11
> > >> > >> > >> > >>
> > >> > >> > >> > >>
> > >> > >> > >> > >> 2015-09-28 18:02 GMT+02:00 Fabian Hueske <
> > [hidden email] <javascript:;>
> > >> > >> > >> > <javascript:;>>:
> > >> > >> > >> > >>
> > >> > >> > >> > >>> @Chiwan, sure. Will do that. Thanks for pointing it
> out
> > :-)
> > >> > >> > >> > >>>
> > >> > >> > >> > >>> 2015-09-28 18:00 GMT+02:00 Chiwan Park <
> > >> > [hidden email] <javascript:;>
> > >> > >> > >> > <javascript:;>>:
> > >> > >> > >> > >>>
> > >> > >> > >> > >>>> @Fabian, Could you cover FLINK-2712 in your pull
> > request?
> > >> I
> > >> > >> think
> > >> > >> > >> that
> > >> > >> > >> > >>>> it would be better than split pull request.
> > >> > >> > >> > >>>>
> > >> > >> > >> > >>>> Regards,
> > >> > >> > >> > >>>> Chiwan Park
> > >> > >> > >> > >>>>
> > >> > >> > >> > >>>> > On Sep 28, 2015, at 4:51 PM, Fabian Hueske <
> > >> > >> [hidden email] <javascript:;>
> > >> > >> > >> > <javascript:;>> wrote:
> > >> > >> > >> > >>>> >
> > >> > >> > >> > >>>> > Thanks everybody for the discussion.
> > >> > >> > >> > >>>> > I'll prepare a pull request to update the "How to
> > >> > contribute"
> > >> > >> > and
> > >> > >> > >> > >>>> "Coding
> > >> > >> > >> > >>>> > Guidelines".
> > >> > >> > >> > >>>> >
> > >> > >> > >> > >>>> > Thanks,
> > >> > >> > >> > >>>> > Fabian
> > >> > >> > >> > >>>> >
> > >> > >> > >> > >>>> > 2015-09-26 9:06 GMT+02:00 Maximilian Michels <
> > >> > [hidden email] <javascript:;>
> > >> > >> > >> > <javascript:;>>:
> > >> > >> > >> > >>>> >
> > >> > >> > >> > >>>> >> Hi Fabian,
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> This is a very important topic. Thanks for
> starting
> > the
> > >> > >> > >> discussion.
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> 1) JIRA discussion
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> Absolutely. No new feature should be introduced
> > >> without a
> > >> > >> > >> > discussion.
> > >> > >> > >> > >>>> >> Frankly, I see the problem that sometimes
> > discussions
> > >> > only
> > >> > >> > come
> > >> > >> > >> up
> > >> > >> > >> > >>>> >> when the pull request has been opened. However,
> this
> > >> can
> > >> > be
> > >> > >> > >> > overcome
> > >> > >> > >> > >>>> >> by the design document.
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> 2) Design document
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> +1 for the document. It increases transparency but
> > also
> > >> > >> helps
> > >> > >> > the
> > >> > >> > >> > >>>> >> contributor to think his idea through before
> > starting
> > >> to
> > >> > >> code.
> > >> > >> > >> The
> > >> > >> > >> > >>>> >> document could also be written directly in JIRA.
> > That
> > >> > way,
> > >> > >> it
> > >> > >> > is
> > >> > >> > >> > more
> > >> > >> > >> > >>>> >> accessible. JIRA offers mark up; even images can
> be
> > >> > attached
> > >> > >> > and
> > >> > >> > >> > >>>> >> displayed in the JIRA description.
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> I'd like to propose another section "Limitations"
> > for
> > >> the
> > >> > >> > design
> > >> > >> > >> > >>>> >> document. Breaking API changes should also be
> listed
> > >> on a
> > >> > >> > special
> > >> > >> > >> > >>>> Wiki
> > >> > >> > >> > >>>> >> page.
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> 3) Coding style
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> In addition to updating the document, do we want
> to
> > >> > enforce
> > >> > >> > >> coding
> > >> > >> > >> > >>>> >> styles also by adding new Maven Checkstyle rules?
> > IMHO
> > >> > >> strict
> > >> > >> > >> rules
> > >> > >> > >> > >>>> >> could cause more annoyances than they actually
> > >> > contribute to
> > >> > >> > the
> > >> > >> > >> > >>>> >> readability of the code. Perhaps this should be
> > >> discussed
> > >> > >> in a
> > >> > >> > >> > >>>> >> separate thread.
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> +1 for collecting common problems and design
> > patterns
> > >> to
> > >> > >> > include
> > >> > >> > >> > them
> > >> > >> > >> > >>>> >> in the document. I was thinking, that we should
> also
> > >> > cover
> > >> > >> > some
> > >> > >> > >> of
> > >> > >> > >> > >>>> the
> > >> > >> > >> > >>>> >> features of tools and dependencies we heavily use,
> > e.g.
> > >> > >> > Travis,
> > >> > >> > >> > >>>> >> Mockito, Guava, Log4j, FlinkMiniCluster, Unit
> > testing
> > >> vs
> > >> > IT
> > >> > >> > >> cases,
> > >> > >> > >> > >>>> >> etc.
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> 4 ) Restructuring the how to contribute guide
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> Good idea to have a meta document that explains
> how
> > >> > >> > contributing
> > >> > >> > >> > >>>> works
> > >> > >> > >> > >>>> >> in general, and another document for technical
> > things.
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> Cheers,
> > >> > >> > >> > >>>> >> Max
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>> >> On Thu, Sep 24, 2015 at 2:53 PM, Fabian Hueske <
> > >> > >> > >> [hidden email] <javascript:;>
> > >> > >> > >> > <javascript:;>>
> > >> > >> > >> > >>>> wrote:
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> Thanks everybody for feedback and comments.
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> Regarding 1) and 2):
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> I like the idea of keeping the discussion of new
> > >> > features
> > >> > >> and
> > >> > >> > >> > >>>> >> improvements
> > >> > >> > >> > >>>> >>> in JIRA as Kostas proposed.
> > >> > >> > >> > >>>> >>> Our coding guidelines [1] already request a JIRA
> > issue
> > >> > for
> > >> > >> > each
> > >> > >> > >> > pull
> > >> > >> > >> > >>>> >>> request.
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> How about we highlight this requirement more
> > >> prominently
> > >> > >> and
> > >> > >> > >> > follow
> > >> > >> > >> > >>>> this
> > >> > >> > >> > >>>> >>> rule more strict from now on.
> > >> > >> > >> > >>>> >>> JIRA issues for new features and improvements
> > should
> > >> > >> clearly
> > >> > >> > >> > >>>> specify the
> > >> > >> > >> > >>>> >>> scope and requirements for the new feature /
> > >> > improvement.
> > >> > >> > >> > >>>> >>> The level of detail is up to the reporter of the
> > >> issue,
> > >> > but
> > >> > >> > the
> > >> > >> > >> > >>>> community
> > >> > >> > >> > >>>> >>> can request more detail or change the scope and
> > >> > >> requirements
> > >> > >> > by
> > >> > >> > >> > >>>> >> discussion.
> > >> > >> > >> > >>>> >>> When a JIRA issue for a new feature or
> improvement
> > is
> > >> > >> opened,
> > >> > >> > >> the
> > >> > >> > >> > >>>> >> community
> > >> > >> > >> > >>>> >>> can start a discussion whether the feature is
> > >> desirable
> > >> > for
> > >> > >> > >> Flink
> > >> > >> > >> > >>>> or not.
> > >> > >> > >> > >>>> >>> Any contributor (including the reporter) can also
> > >> > attach a
> > >> > >> > >> > >>>> >>> "design-doc-requested" label to the issue. A
> design
> > >> > >> document
> > >> > >> > can
> > >> > >> > >> > be
> > >> > >> > >> > >>>> >>> proposed by anybody, including the reporter or
> > >> assignee
> > >> > of
> > >> > >> > the
> > >> > >> > >> > JIRA
> > >> > >> > >> > >>>> >> issue.
> > >> > >> > >> > >>>> >>> However, the issue cannot be resolved and a
> > >> > corresponding
> > >> > >> PR
> > >> > >> > not
> > >> > >> > >> > be
> > >> > >> > >> > >>>> >> merged
> > >> > >> > >> > >>>> >>> before a design document has been accepted by
> lazy
> > >> > >> consensus.
> > >> > >> > >> > >>>> Hence, an
> > >> > >> > >> > >>>> >>> assignee should propose a design doc before
> > starting
> > >> to
> > >> > >> code
> > >> > >> > to
> > >> > >> > >> > >>>> avoid
> > >> > >> > >> > >>>> >> major
> > >> > >> > >> > >>>> >>> redesigns of the implementation.
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> This way it is up to the community when to start
> a
> > >> > >> discussion
> > >> > >> > >> > about
> > >> > >> > >> > >>>> >> whether
> > >> > >> > >> > >>>> >>> a feature request is accepted or to request a
> > design
> > >> > >> > document.
> > >> > >> > >> We
> > >> > >> > >> > >>>> can
> > >> > >> > >> > >>>> >> make
> > >> > >> > >> > >>>> >>> design documents mandatory for changes that touch
> > the
> > >> > >> public
> > >> > >> > >> API.
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> Regarding 3):
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> I agree with Vasia, that we should collect
> > suggestions
> > >> > for
> > >> > >> > >> common
> > >> > >> > >> > >>>> >> patterns
> > >> > >> > >> > >>>> >>> and also continuously update the coding
> guidelines.
> > >> > >> > >> > >>>> >>> @Henry, I had best practices (exception handling,
> > >> tests,
> > >> > >> > etc.)
> > >> > >> > >> in
> > >> > >> > >> > >>>> mind.
> > >> > >> > >> > >>>> >>> Syntactic code style is important as well, but we
> > >> should
> > >> > >> > have a
> > >> > >> > >> > >>>> separate
> > >> > >> > >> > >>>> >>> discussion about that, IMO.
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> Proposal for a design document template:
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> - Overview of general approach
> > >> > >> > >> > >>>> >>> - API changes (changed interfaces, new /
> deprecated
> > >> > >> > >> configuration
> > >> > >> > >> > >>>> >>> parameters, changed behavior)
> > >> > >> > >> > >>>> >>> - Main components and classes to touch
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> Cheers,
> > >> > >> > >> > >>>> >>> Fabian
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> [1]
> http://flink.apache.org/coding-guidelines.html
> > >> > >> > >> > >>>> >>> <http://flink.apache.org/coding-guidelines.html>
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>> 2015-09-24 10:52 GMT+02:00 Chiwan Park <
> > >> > >> > [hidden email] <javascript:;>
> > >> > >> > >> > <javascript:;>>:
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>>> Thanks Fabian for starting the discussion.
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>> +1 for overall approach.
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>> About (1), expressing that consensus must be
> > required
> > >> > for
> > >> > >> > new
> > >> > >> > >> > >>>> feature
> > >> > >> > >> > >>>> >> in
> > >> > >> > >> > >>>> >>>> “How to contribute” page is very nice. Some pull
> > >> > requests
> > >> > >> > were
> > >> > >> > >> > sent
> > >> > >> > >> > >>>> >> without
> > >> > >> > >> > >>>> >>>> consensus. The contributors had to rewrote their
> > pull
> > >> > >> > requests.
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>> Agree with (2), (3) and (4).
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>> Regards,
> > >> > >> > >> > >>>> >>>> Chiwan Park
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>>> On Sep 24, 2015, at 2:23 AM, Henry Saputra <
> > >> > >> > >> > >>>> [hidden email] <javascript:;>
> <javascript:;>>
> > >> > >> > >> > >>>> >>>> wrote:
> > >> > >> > >> > >>>> >>>>>
> > >> > >> > >> > >>>> >>>>> Thanks again, Fabian for starting the
> > discussions.
> > >> > >> > >> > >>>> >>>>>
> > >> > >> > >> > >>>> >>>>> For (1) and (2) I think it is good idea and
> will
> > >> help
> > >> > >> > people
> > >> > >> > >> to
> > >> > >> > >> > >>>> >>>>> understand and follow the author thought
> process.
> > >> > >> > >> > >>>> >>>>> Following up with Stephan's reply, some new
> > features
> > >> > >> > solutions
> > >> > >> > >> > >>>> could
> > >> > >> > >> > >>>> >>>>> be explained thoroughly in the PR descriptions
> > but
> > >> > some
> > >> > >> > >> requires
> > >> > >> > >> > >>>> >>>>> additional reviews of the proposed design.
> > >> > >> > >> > >>>> >>>>> I like the idea of using tag in JIRA whether
> new
> > >> > features
> > >> > >> > >> should
> > >> > >> > >> > >>>> or
> > >> > >> > >> > >>>> >>>>> should not being accompanied by design
> document.
> > >> > >> > >> > >>>> >>>>>
> > >> > >> > >> > >>>> >>>>> Agree with (3) and (4).
> > >> > >> > >> > >>>> >>>>> As for (3) are you thinking about more of style
> > of
> > >> > code
> > >> > >> > syntax
> > >> > >> > >> > via
> > >> > >> > >> > >>>> >>>>> checkstyle updates, or best practices in term
> of
> > no
> > >> > >> mutable
> > >> > >> > >> > state
> > >> > >> > >> > >>>> if
> > >> > >> > >> > >>>> >>>>> possible, throw precise Exception if possible
> for
> > >> > >> > interfaces,
> > >> > >> > >> > >>>> etc. ?
> > >> > >> > >> > >>>> >>>>>
> > >> > >> > >> > >>>> >>>>> - Henry
> > >> > >> > >> > >>>> >>>>>
> > >> > >> > >> > >>>> >>>>>
> > >> > >> > >> > >>>> >>>>>
> > >> > >> > >> > >>>> >>>>>
> > >> > >> > >> > >>>> >>>>> On Wed, Sep 23, 2015 at 9:31 AM, Stephan Ewen <
> > >> > >> > >> [hidden email] <javascript:;>
> > >> > >> > >> > <javascript:;>>
> > >> > >> > >> > >>>> >> wrote:
> > >> > >> > >> > >>>> >>>>>> Thanks, Fabian for driving this!
> > >> > >> > >> > >>>> >>>>>>
> > >> > >> > >> > >>>> >>>>>> I agree with your points.
> > >> > >> > >> > >>>> >>>>>>
> > >> > >> > >> > >>>> >>>>>> Concerning Vasia's comment to not raise the
> bar
> > too
> > >> > >> high:
> > >> > >> > >> > >>>> >>>>>> That is true, the requirements should be
> > >> reasonable.
> > >> > We
> > >> > >> > can
> > >> > >> > >> > >>>> >> definitely
> > >> > >> > >> > >>>> >>>> tag
> > >> > >> > >> > >>>> >>>>>> issues as "simple" which means they do not
> > require
> > >> a
> > >> > >> > design
> > >> > >> > >> > >>>> >> document.
> > >> > >> > >> > >>>> >>>> That
> > >> > >> > >> > >>>> >>>>>> should be more for new features and needs not
> be
> > >> very
> > >> > >> > >> detailed.
> > >> > >> > >> > >>>> >>>>>>
> > >> > >> > >> > >>>> >>>>>> We could also make the inverse, meaning we
> > >> explicitly
> > >> > >> tag
> > >> > >> > >> > certain
> > >> > >> > >> > >>>> >>>> issues as
> > >> > >> > >> > >>>> >>>>>> "requires design document".
> > >> > >> > >> > >>>> >>>>>>
> > >> > >> > >> > >>>> >>>>>> Greetings,
> > >> > >> > >> > >>>> >>>>>> Stephan
> > >> > >> > >> > >>>> >>>>>>
> > >> > >> > >> > >>>> >>>>>>
> > >> > >> > >> > >>>> >>>>>>
> > >> > >> > >> > >>>> >>>>>>
> > >> > >> > >> > >>>> >>>>>> On Wed, Sep 23, 2015 at 5:05 PM, Vasiliki
> > Kalavri <
> > >> > >> > >> > >>>> >>>> [hidden email] <javascript:;>
> <javascript:;>
> > >> > >> > >> > >>>> >>>>>>> wrote:
> > >> > >> > >> > >>>> >>>>>>
> > >> > >> > >> > >>>> >>>>>>> Hi,
> > >> > >> > >> > >>>> >>>>>>>
> > >> > >> > >> > >>>> >>>>>>> I agree with you Fabian. Clarifying these
> > issues
> > >> in
> > >> > the
> > >> > >> > "How
> > >> > >> > >> > to
> > >> > >> > >> > >>>> >>>> Contribute"
> > >> > >> > >> > >>>> >>>>>>> guide will save lots of time both to
> reviewers
> > and
> > >> > >> > >> > contributors.
> > >> > >> > >> > >>>> >> It is
> > >> > >> > >> > >>>> >>>> a
> > >> > >> > >> > >>>> >>>>>>> really disappointing situation when someone
> > spends
> > >> > time
> > >> > >> > >> > >>>> >> implementing
> > >> > >> > >> > >>>> >>>>>>> something and their PR ends up being rejected
> > >> > because
> > >> > >> > either
> > >> > >> > >> > the
> > >> > >> > >> > >>>> >>>> feature
> > >> > >> > >> > >>>> >>>>>>> was not needed or the implementation details
> > were
> > >> > never
> > >> > >> > >> agreed
> > >> > >> > >> > >>>> on.
> > >> > >> > >> > >>>> >>>>>>>
> > >> > >> > >> > >>>> >>>>>>> That said, I think we should also make sure
> > that
> > >> we
> > >> > >> don't
> > >> > >> > >> > raise
> > >> > >> > >> > >>>> the
> > >> > >> > >> > >>>> >>>> bar too
> > >> > >> > >> > >>>> >>>>>>> high for simple contributions.
> > >> > >> > >> > >>>> >>>>>>>
> > >> > >> > >> > >>>> >>>>>>> Regarding (1) and (2), I think we should
> > clarify
> > >> > what
> > >> > >> > kind
> > >> > >> > >> of
> > >> > >> > >> > >>>> >>>>>>> additions/changes require this process to be
> > >> > followed.
> > >> > >> > e.g.
> > >> > >> > >> do
> > >> > >> > >> > >>>> we
> > >> > >> > >> > >>>> >> need
> > >> > >> > >> > >>>> >>>> to
> > >> > >> > >> > >>>> >>>>>>> discuss additions for which JIRAs already
> > exist?
> > >> > Ideas
> > >> > >> > >> > described
> > >> > >> > >> > >>>> >> in the
> > >> > >> > >> > >>>> >>>>>>> roadmaps? Adding a new algorithm to
> > >> Gelly/Flink-ML?
> > >> > >> > >> > >>>> >>>>>>>
> > >> > >> > >> > >>>> >>>>>>> Regarding (3), maybe we can all suggest some
> > >> > >> > >> examples/patterns
> > >> > >> > >> > >>>> that
> > >> > >> > >> > >>>> >>>> we've
> > >> > >> > >> > >>>> >>>>>>> seen when reviewing PRs and then choose the
> > most
> > >> > common
> > >> > >> > (or
> > >> > >> > >> > >>>> all).
> > >> > >> > >> > >>>> >>>>>>>
> > >> > >> > >> > >>>> >>>>>>> (4) sounds good to me.
> > >> > >> > >> > >>>> >>>>>>>
> > >> > >> > >> > >>>> >>>>>>> Cheers,
> > >> > >> > >> > >>>> >>>>>>> Vasia.
> > >> > >> > >> > >>>> >>>>>>>
> > >> > >> > >> > >>>> >>>>>>> On 23 September 2015 at 15:08, Kostas
> Tzoumas <
> > >> > >> > >> > >>>> [hidden email] <javascript:;> <javascript:;>
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>>> wrote:
> > >> > >> > >> > >>>> >>>>>>>
> > >> > >> > >> > >>>> >>>>>>>> Big +1.
> > >> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>> For (1), a discussion in JIRA would also be
> an
> > >> > option
> > >> > >> > IMO
> > >> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>> For (2), let us come up with few examples on
> > what
> > >> > >> > >> > constitutes a
> > >> > >> > >> > >>>> >>>> feature
> > >> > >> > >> > >>>> >>>>>>>> that needs a design doc, and what should be
> in
> > >> the
> > >> > doc
> > >> > >> > (IMO
> > >> > >> > >> > >>>> >>>>>>>> architecture/general approach, components
> > >> touched,
> > >> > >> > >> interfaces
> > >> > >> > >> > >>>> >> changed)
> > >> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>> On Wed, Sep 23, 2015 at 2:24 PM, Fabian
> > Hueske <
> > >> > >> > >> > >>>> [hidden email] <javascript:;> <javascript:;>
> > >> > >> > >> > >>>> >>>
> > >> > >> > >> > >>>> >>>>>>> wrote:
> > >> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>> Hi everybody,
> > >> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>> I guess we all have noticed that the Flink
> > >> > community
> > >> > >> is
> > >> > >> > >> > >>>> quickly
> > >> > >> > >> > >>>> >>>> growing
> > >> > >> > >> > >>>> >>>>>>>> and
> > >> > >> > >> > >>>> >>>>>>>>> more and more contributions are coming in.
> > >> > Recently,
> > >> > >> a
> > >> > >> > few
> > >> > >> > >> > >>>> >>>>>>> contributions
> > >> > >> > >> > >>>> >>>>>>>>> proposed new features without being
> > discussed on
> > >> > the
> > >> > >> > >> mailing
> > >> > >> > >> > >>>> >> list.
> > >> > >> > >> > >>>> >>>> Some
> > >> > >> > >> > >>>> >>>>>>>> of
> > >> > >> > >> > >>>> >>>>>>>>> these contributions were not accepted in
> the
> > >> end.
> > >> > In
> > >> > >> > other
> > >> > >> > >> > >>>> cases,
> > >> > >> > >> > >>>> >>>> pull
> > >> > >> > >> > >>>> >>>>>>>>> requests had to be heavily reworked because
> > the
> > >> > >> > approach
> > >> > >> > >> > taken
> > >> > >> > >> > >>>> >> was
> > >> > >> > >> > >>>> >>>> not
> > >> > >> > >> > >>>> >>>>>>>> the
> > >> > >> > >> > >>>> >>>>>>>>> best one. These are situations which should
> > be
> > >> > >> avoided
> > >> > >> > >> > because
> > >> > >> > >> > >>>> >> both
> > >> > >> > >> > >>>> >>>> the
> > >> > >> > >> > >>>> >>>>>>>>> contributor as well as the person who
> > reviewed
> > >> the
> > >> > >> > >> > >>>> contribution
> > >> > >> > >> > >>>> >>>>>>> invested
> > >> > >> > >> > >>>> >>>>>>>> a
> > >> > >> > >> > >>>> >>>>>>>>> lot of time for nothing.
> > >> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>> I had a look at our “How to contribute” and
> > >> > “Coding
> > >> > >> > >> > guideline”
> > >> > >> > >> > >>>> >> pages
> > >> > >> > >> > >>>> >>>>>>> and
> > >> > >> > >> > >>>> >>>>>>>>> think, we can improve them. I see basically
> > two
> > >> > >> issues:
> > >> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>> 1. The documents do not explain how to
> > propose
> > >> and
> > >> > >> > discuss
> > >> > >> > >> > new
> > >> > >> > >> > >>>> >>>>>>> features
> > >> > >> > >> > >>>> >>>>>>>>> and improvements.
> > >> > >> > >> > >>>> >>>>>>>>> 2. The documents are quite technical and
> the
> > >> > >> structure
> > >> > >> > >> could
> > >> > >> > >> > >>>> be
> > >> > >> > >> > >>>> >>>>>>>> improved,
> > >> > >> > >> > >>>> >>>>>>>>> IMO.
> > >> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>> I would like to improve these pages and
> > propose
> > >> > the
> > >> > >> > >> > following
> > >> > >> > >> > >>>> >>>>>>> additions:
> > >> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>> 1. Request contributors and committers to
> > start
> > >> > >> > >> discussions
> > >> > >> > >> > on
> > >> > >> > >> > >>>> >> the
> > >> > >> > >> > >>>> >>>>>>>>> mailing list for new features. This
> > discussion
> > >> > should
> > >> > >> > help
> > >> > >> > >> > to
> > >> > >> > >> > >>>> >> figure
> > >> > >> > >> > >>>> >>>>>>> out
> > >> > >> > >> > >>>> >>>>>>>>> whether such a new feature is a good fit
> for
> > >> Flink
> > >> > >> and
> > >> > >> > >> give
> > >> > >> > >> > >>>> first
> > >> > >> > >> > >>>> >>>>>>>> pointers
> > >> > >> > >> > >>>> >>>>>>>>> for a design to implement it.
> > >> > >> > >> > >>>> >>>>>>>>> 2. Require contributors and committers to
> > write
> > >> > >> design
> > >> > >> > >> > >>>> >> documents for
> > >> > >> > >> > >>>> >>>>>>>> all
> > >> > >> > >> > >>>> >>>>>>>>> new features and major improvements. These
> > >> > documents
> > >> > >> > >> should
> > >> > >> > >> > be
> > >> > >> > >> > >>>> >>>> attached
> > >> > >> > >> > >>>> >>>>>>>> to
> > >> > >> > >> > >>>> >>>>>>>>> a JIRA issue and follow a template which
> > needs
> > >> to
> > >> > be
> > >> > >> > >> > defined.
> > >> > >> > >> > >>>> >>>>>>>>> 3. Extend the “Coding Style Guides” and add
> > >> > patterns
> > >> > >> > that
> > >> > >> > >> > are
> > >> > >> > >> > >>>> >>>>>>> commonly
> > >> > >> > >> > >>>> >>>>>>>>> remarked in pull requests.
> > >> > >> > >> > >>>> >>>>>>>>> 4. Restructure the current pages into three
> > >> > pages: a
> > >> > >> > >> general
> > >> > >> > >> > >>>> >> guide
> > >> > >> > >> > >>>> >>>>>>> for
> > >> > >> > >> > >>>> >>>>>>>>> contributions and two guides for how to
> > >> > contribute to
> > >> > >> > code
> > >> > >> > >> > and
> > >> > >> > >> > >>>> >>>> website
> > >> > >> > >> > >>>> >>>>>>>> with
> > >> > >> > >> > >>>> >>>>>>>>> all technical issues (repository, IDE
> setup,
> > >> build
> > >> > >> > system,
> > >> > >> > >> > >>>> etc.)
> > >> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>> Looking forward for your comments,
> > >> > >> > >> > >>>> >>>>>>>>> Fabian
> > >> > >> > >> > >>>> >>>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>>
> > >> > >> > >> > >>>> >>>>>>>
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>>>
> > >> > >> > >> > >>>> >>
> > >> > >> > >> > >>>>
> > >> > >> > >> > >>>>
> > >> > >> > >> > >>>>
> > >> > >> > >> > >>>>
> > >> > >> > >> > >>>>
> > >> > >> > >> > >>>>
> > >> > >> > >> > >>>
> > >> > >> > >> > >>
> > >> > >> > >> > >
> > >> > >> > >> >
> > >> > >> > >>
> > >> > >> >
> > >> > >>
> > >> >
> > >>
> >
>