Are you saying Kafka REST is subjective but Kafka Streams and Kafka Connect
are not subjective?

> "there are likely places that can live without a rest proxy"

There are also places that can live without Kafka Streams and Kafka Connect.

Nacho

On Fri, Oct 21, 2016 at 11:17 AM, Jun Rao <j...@confluent.io> wrote:

> At the high level, I think ideally it makes sense to add a component to
> Apache Kafka if (1) it's widely needed and (2) it needs tight integration
> with Kafka core. For Kafka Stream, we do expect stream processing will be
> used widely in the future. Implementation wise, Kafka Stream only supports
> getting data from Kafka and leverages quite a few of the core
> functionalities in Kafka core. For example, it uses customized rebalance
> callback in the consumer and uses the compacted topic heavily. So, having
> Kafka Stream in the same repo makes it easier for testing when those core
> functionalities evolve over time. Kafka Connect is in the same situation.
>
> For rest proxy, whether it's widely used or not is going to be a bit
> subjective. However, there are likely places that can live without a rest
> proxy. The rest proxy is just a proxy for the regular clients and doesn't
> need to be tightly integrated with Kafka core. So, the case for including
> rest proxy in Apache Kafka is probably not as strong as Kafka Stream and
> Kafka Connect.
>
> Thanks,
>
> Jun
>
> On Thu, Oct 20, 2016 at 11:28 PM, Michael Pearce <michael.pea...@ig.com>
> wrote:
>
> > So from my reading essentially the first question needs to answered/and
> > voted on is:
> >
> > Is Apache Kafka Community only about the Core or does the apache
> community
> > also support some subprojects (and just we need some better way to manage
> > this)
> >
> > If vote for Core only wins, then the following should be removed:
> > Kafka Connect
> > Kafka Stream
> >
> > If vote for Core only loses (aka we will support subprojects) then:
> > We should look to add Kafka Rest
> >
> > And we should look to see how we can manage better govern and manage
> > submodules.
> >
> > A good example which id propose here is how some other communities in
> > Apache do this.
> >
> > Each Module has a Module Management Committee(MMC), this is like almost
> > the PMC but at a per module basis.
> >
> > This MMC should essentially hold the binding votes for that module.
> > The MMC should be made up of a single representative from each
> > organisation  (so no single organisation can fully veto the community it
> > has to a genuine consenus)
> > The MMC requires at least 3 members (so there cant be a tied vote on 2)
> > For a new Module to be added a MMC committee should be sought
> > A new Module is only capable of being added if the above requirements can
> > be met (e.g. 3 people wishing to step up, from 3 organisations) so that
> > only actively support modules would be added
> >
> > The PMC reviews each module every 6months or Year. If MMC is inactive, a
> > vote/call to find replacements if raised, if none are forthcoming
> dropping
> > the MMC to less than 3 then the module moves to "the attic" (very much
> like
> > apache attic but a little more aggressively)
> >
> > This way the PMC does not need to micro manage every module
> > We only add modules where some amount of active support and maintenance
> > and use is provided by the community
> > We have an automatic way to retire old or inactive projects.
> >
> > Thoughts?
> > Mike
> >
> >
> > ________________________________________
> > From: Harsha Ch <harsha...@gmail.com>
> > Sent: Thursday, October 20, 2016 10:26 PM
> > To: dev@kafka.apache.org
> > Subject: Re: [DISCUSS] KIP-80: Kafka REST Server
> >
> > Jay,
> >       REST API is something every user is in need of. If the argument is
> to
> > clone and write your  API, this will do a disservice to the users as they
> > now have to choose one vs. others instead of keeping one API that is
> > supported in Kafka community.
> >
> > "Pre-emptively re-creating another
> > REST layer when it seems like we all quite agree on what needs to be done
> > and we have an existing code base for HTTP/Kafka access that is heavily
> > used in production seems quite silly."
> >
> >        Exactly our point. Why can't we develop this in Apache Kafka
> > community? Instead of us open sourcing another GitHub project and
> creating
> > a divide in users and another version of API. Let's build this in Kafka
> > Community and use the governance model that is proven to provide vendor
> > free user driven consensus features. The argument that is adding this
> REST
> > server to Kafka will affect the agility of the project doesn't mak sense.
> >
> > It looks like your argument is either we develop all these small tools or
> > none at all. We as a community need to look at supporting critical
> > tools/API. Instead of dividing this project into individual external
> > communities. We should build this as part of Kafka which best serves the
> > needs of users.
> >         The Streams and Connect projects that were pushed into Kafka
> could
> > have been left in their own Github projects based on your arguments. What
> > about the REST API is so different that such that it should stay out of
> the
> > Kafka project? From my experience, more users are asking for the REST
> API.
> >
> > Thanks,
> > Harsha
> >
> >
> >
> >
> >
> > On Wed, Oct 12, 2016 at 8:03 AM Jay Kreps <j...@confluent.io> wrote:
> >
> > > I think the questions around governance make sense, I think we should
> > > really clarify that to make the process more clear so it can be fully
> > > inclusive.
> > >
> > > The idea that we should not collaborate on what is there now, though,
> > > because in the future we might disagree about direction does not really
> > > make sense to me. If in the future we disagree, that is the beauty of
> > open
> > > source, you can always fork off a copy of the code and start an
> > independent
> > > project either in Apache or elsewhere. Pre-emptively re-creating
> another
> > > REST layer when it seems like we all quite agree on what needs to be
> done
> > > and we have an existing code base for HTTP/kafka access that is heavily
> > > used in production seems quite silly.
> > >
> > > Let me give some background on how I at least think about these things.
> > > I've participated in open source projects out of LinkedIn via github as
> > > well as via the ASF. I don't think there is a "right" answer to how to
> do
> > > these but rather some tradeoffs. We thought about this quite a lot in
> the
> > > context of Kafka based on the experience with the Hadoop ecosystem as
> > well
> > > as from other open source communities.
> > >
> > > There is a rich ecosystem around Kafka. Many of the projects are quite
> > > small--single clients or tools that do a single thing well--and almost
> > none
> > > of them are top level apache projects. I don't think trying to force
> each
> > > of these to turn into independent Apache projects is necessarily the
> best
> > > thing for the ecosystem.
> > >
> > > My observation of how this can go wrong is really what I think has
> > happened
> > > to the Hadoop ecosystem. There you see quite a zoo of projects which
> all
> > > drift apart and don't quite work together well. Coordinating even
> simple
> > > changes and standardization across these is exceptionally difficult.
> The
> > > result is a bit of a mess for users--the pieces just don't really come
> > > together very well. This makes sense for independent infrastructure
> > systems
> > > (Kudu vs HDFS) but I'm not at all convinced that doing this for every
> > > little tool or helper library has lead to a desirable state. I think
> the
> > > mode of operating where the Hadoop vendors spawn off a few new Apache
> > > projects for each new product initiative, especially since often that
> > > project is only valued by that vendor (and the other vendor has a
> > different
> > > competing Apache project) doesn't necessarily do a better job at
> > producing
> > > high quality communities or high quality software.
> > >
> > > These tools/connects/clients/proxies and other integration pieces can
> > take
> > > many forms, but my take of what makes one of these things good is that
> it
> > > remains simple, does its one thing well, and cleaves as closely as
> > possible
> > > to the conventions for Kafka itself--i.e. doesn't invent new ways of
> > > monitoring, configuring, etc. For the tools we've contributed we've
> tried
> > > really hard to make them consistent with Kafka as well as with each
> other
> > > in how testing, configuration, monitoring, etc works.
> > >
> > > I think what Apache does superbly well is create a community for
> > managing a
> > > large infrastructure layer like Kafka in a vendor independent way.
> What I
> > > think is less successful is attempting to form full and independent
> > apache
> > > communities around very simple single purpose tools, especially if you
> > hope
> > > for these to come together into a cohesive toolset across multiple such
> > > tools. Much of what Apache does--create a collective decision making
> > > process for resolving disagreement, help to trademark and protect the
> > marks
> > > of the project, etc just isn't that relevant for simple single-purpose
> > > tools.
> > >
> > > So my take is there are a couple of options:
> > >
> > >    1. We can try to put all the small tools into the Apache Project. I
> > >    think this is not the right approach as there is simply too many of
> > > them,
> > >    many in different languages, serving different protocols,
> integrating
> > > with
> > >    particular systems, and a single community can't effectively
> maintain
> > > them
> > >    all. Doing this would significantly slow the progress of the Kafka
> > > project.
> > >    As a protocol for messaging, I don't really see a case for including
> > > REST
> > >    but not MQTT or AMQP which are technically much better suited to
> > > messaging
> > >    and both are widely used for that.
> > >    2. We can treat ecosystem projects that aren't top level Apache
> > projects
> > >    as invalid and try to recreate them all as Apache projects.
> Honestly,
> > >    though, if you go to the Kafka ecosystem page virtually none of the
> > most
> > >    popular add-ons to Kafka are Apache projects. The most successful
> > > things in
> > >    the Kafka ecosystem such as Yahoo Manager, librdkafka, a number of
> > other
> > >    clients, as well as the existing REST layer have succeeded at
> > developing
> > >    communities that actively contribute and use these pieces and I
> don't
> > > know
> > >    that that is a bad thing unless that community proves to be
> > uninclusive,
> > >    unresponsive, or goes in a bad technical direction--and those are
> > > failure
> > >    modes that all open source efforts face.
> > >    3. We can do what I think makes the most sense and try to work with
> > the
> > >    projects that exist in the ecosystem and if the project doesn't
> have a
> > >    responsive community or wants to go in a different direction fork or
> > >    recreate that work.
> > >
> > > Of course any person can choose whatever of these options they want.
> But
> > > from my point of view, option (3) has been the path of the community so
> > far
> > > and I think it has been quite successful.
> > >
> > > -Jay
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > On Tue, Oct 11, 2016 at 10:33 PM, Harsha Chintalapani <ka...@harsha.io
> >
> > > wrote:
> > >
> > > > Neha,
> > > > "But I haven't seen any community emails or patches being submitted
> by
> > > you
> > > > guys, so I'm wondering why you are concerned about whether the
> > community
> > > is
> > > > open to accepting patches or not."
> > > >
> > > > I think you are talking about contributing patches to this repository
> > > > right? https://github.com/confluentinc/kafka-rest . All I am saying
> > > > the guidelines/governance model is not clear on the project and I
> guess
> > > its
> > > > driven by opening a github issue request.  Its the repository owned
> by
> > > > confluent and as much I appreciate that the features we mentioned are
> > in
> > > > the roadmap and welcoming us to contribute to the project. It doesn't
> > > > gurantee what we want to add in the furture will be in your roadmap.
> > > >
> > > > Hence the reason having it part of Kafka community will help a lot as
> > > other
> > > > users can participate in the discussions.  We are happy to drive any
> > > > feature additions through KIPs which gives everyone a chance to
> > > participate
> > > > and add to the discussions.
> > > >
> > > > Thanks,
> > > > Harsha
> > > >
> > > > On Fri, Oct 7, 2016 at 11:52 PM Michael Pearce <
> michael.pea...@ig.com>
> > > > wrote:
> > > >
> > > > > +1
> > > > >
> > > > > I agree on the governance comments whole heartedly.
> > > > >
> > > > > Also i agree about the contribution comments made earlier in the
> > > thread,
> > > > i
> > > > > personally am less likely to spend any of mine, or give project
> time
> > > > within
> > > > > my internal projects to developers contributing to another
> commercial
> > > > > companies project even so technically open source, as then there is
> > > that
> > > > > commercial companies interest will always prevail and essentially
> can
> > > > > always have a final vote where disagreement. Im sure they never
> > intend
> > > > to,
> > > > > but there is that true reality. This is why we have community open
> > > source
> > > > > projects.
> > > > >
> > > > > I can find many different implementations now of a rest endpoint on
> > > > > GitHub, BitBucket etc. Each one has their benefits and
> disadvantages
> > in
> > > > > their implementation. By making / providing one this would bring
> > > together
> > > > > these solutions, unifying those developers and also bringing the
> best
> > > of
> > > > > all.
> > > > >
> > > > > I understand the concern on the community burden adding/supporting
> > more
> > > > > surface area for every client. But something like REST is universal
> > and
> > > > > worthy to be owned by the community.
> > > > >
> > > > > Mike
> > > > >
> > > > >
> > > > > ________________________________________
> > > > > From: Andrew Schofield <andrew_schofield_j...@outlook.com>
> > > > > Sent: Saturday, October 8, 2016 1:19 AM
> > > > > To: dev@kafka.apache.org
> > > > > Subject: Re: [DISCUSS] KIP-80: Kafka REST Server
> > > > >
> > > > > There's a massive difference between the governance of Kafka and
> the
> > > > > governance of the REST proxy.
> > > > >
> > > > > In Kafka, there is a broad community of people contributing their
> > > > opinions
> > > > > about future enhancements in the form of KIPs. There's some really
> > deep
> > > > > consideration that goes into some of the trickier KIPs. There are
> > > people
> > > > > outside Confluent deeply knowledgeable  in Kafka and building the
> > > > > reputations to become committers. I get the impression that the
> > roadmap
> > > > of
> > > > > Kafka is not really community-owned (what's the big feature for
> Kafka
> > > > 0.11,
> > > > > for example), but the conveyor belt of smaller features in the form
> > of
> > > > KIPs
> > > > > works  nicely. It's a good example of open-source working well.
> > > > >
> > > > > The equivalent for the REST proxy is basically issues on GitHub.
> The
> > > > > roadmap is less clear. There's not really a community properly
> > engaged
> > > in
> > > > > the way that there is with Kafka. So, you could say that it's clear
> > > that
> > > > > fewer people are interested, but I think  the whole governance
> thing
> > > is a
> > > > > big barrier to engagement. And it's looking like it's getting out
> of
> > > > date.
> > > > >
> > > > > In technical terms, I can think of two big improvements to the REST
> > > > proxy.
> > > > > First, it needs to use the new consumer API so that it's possible
> to
> > > > secure
> > > > > connections between the REST proxy and Kafka. I don't care too much
> > > which
> > > > > method calls it uses actually  uses to consume messages, but I do
> > care
> > > > that
> > > > > I cannot secure connections because of network security rules.
> > Second,
> > > > > there's an affinity between a consumer and the instance of the REST
> > > proxy
> > > > > to which it first connected. Kafka itself avoids this kind of
> > affinity
> > > > for
> > > > > good reason, and in the name of availability the REST proxy should
> > too.
> > > > > These are natural KIPs.
> > > > >
> > > > > I think it would be good to have the code for the REST proxy
> > > contributed
> > > > > to Apache Kafka so that it would be able to be developed in the
> same
> > > way.
> > > > >
> > > > > Andrew Schofield
> > > > >
> > > > > From: Suresh Srinivas <sur...@hortonworks.com>
> > > > > Sent: 07 October 2016 22:41:52
> > > > > To: dev@kafka.apache.org
> > > > > Subject: Re: [DISCUSS] KIP-80: Kafka REST Server
> > > > >
> > > > > ASF already gives us a clear framework and governance model for
> > > community
> > > > > development. This is already understood by the people contributing
> to
> > > > > Apache Kafka project, and they are the same people who want to
> > > contribute
> > > > > to the REST server capability as well. Everyone is in agreement on
> > the
> > > > > need for collaborating on this effort. So why not contribute the
> code
> > > to
> > > > > Apache Kafka. This will help avoid duplication of effort and forks
> > that
> > > > > may crop up, hugely benefitting the user community. This will also
> > > avoid
> > > > > having to define a process similar to ASF on a GitHub project and
> > > instead
> > > > > there is a single community with clear understanding community
> > process
> > > as
> > > > > defined in ASF.
> > > > >
> > > > > As others have said, this is an important capability for Apache
> > Kafka.
> > > It
> > > > > is worth maintaining this as a part of the project.
> > > > >
> > > > > Regards,
> > > > > Suresh
> > > > >
> > > > > On 10/6/16, 8:32 AM, "Ofir Manor" <ofir.ma...@equalum.io> wrote:
> > > > >
> > > > > >I personally think it would be quite wasteful to re-implement the
> > REST
> > > > > >gateway just because that an actively-maintained piece of
> > > > Apache-licensed
> > > > > >software is not governed directly by the Apache Kafka community...
> > > While
> > > > > >kafka-rest repo is owned by Confluent, the contributors including
> > the
> > > > main
> > > > > >one are also part of the Apache Kafka  community, so there is a
> > chance
> > > > to
> > > > > >work this out.
> > > > > >
> > > > > >However, there are two valid concerns here that could be
> addressed,
> > > > around
> > > > > >community and accessibility:
> > > > > >>> What we are worried about is a project
> > > > > >>> that's not maintained in a community. So the process of
> accepting
> > > > > >>>patches
> > > > > >>> and priorities is not clear, and it's not developed in Apache
> > > > > >>>community.
> > > > > >>> Not only that, existing REST API project doesn't support new
> > client
> > > > API
> > > > > >and
> > > > > >>> hence there is no security support either.
> > > > > >
> > > > > >This might be easy to fix. Maybe Confluent / kafka-rest community
> > can
> > > > > >clarify that - what is their contribution policy, dev style,
> roadmap
> > > > etc.
> > > > > >If they want, they can make an effort to encourage participation
> > from
> > > > > >people outside Confluent (easily accept contributions, invite
> > external
> > > > > >commiters or have open dev process similar to Apache Kafka etc),
> as
> > > > there
> > > > > >is definitely seems to be some interest on the list. That might
> > clear
> > > > the
> > > > > >community concern and help kafka-rest project (but that is a
> > > calculation
> > > > > >Confluent will have to make).
> > > > > >
> > > > > >The other, independent, concern is that REST is something that is
> > > > expected
> > > > > >to be available out of the box with Kafka. I personally don't feel
> > > > > >strongly
> > > > > >about it (better use proper, efficient APIs from day one), though
> it
> > > is
> > > > > >definitely way smaller than adding a stream processing engine to
> the
> > > > > >project :)
> > > > > >Again,the kafka-rest "community" could take steps to make it even
> > > easier
> > > > > >to
> > > > > >install, configure and run kafka-rest for new users on vanilla
> > Apache
> > > > > >Kafka
> > > > > >(outside the Confluent platform), if they wish that (or welcome
> > > > > >contributions to that end), but that is up to them.
> > > > > >Finally, if after the above steps were taken there would still a
> > > strong
> > > > > >desire to include a great rest gateway with Apache Kafka, I assume
> > the
> > > > > >community could hypothetically fork the existing kafka-rest into
> an
> > > > Apache
> > > > > >Kafka subproject and maintain it "within Apache" instead of
> > > implementing
> > > > > >it
> > > > > >from scratch (though I'm not a lawyer etc) - but I cannot imagine
> it
> > > > > >happen
> > > > > >without Confluent blessing, and I think that is likely much less
> > > optimal
> > > > > >(pulling in other Confluent / Apache licensed dependencies) than
> > > having
> > > > a
> > > > > >separate external community around kafka-rest.
> > > > > >
> > > > > >
> > > > > >Just my two cents,
> > > > > >
> > > > > >
> > > > > >Ofir Manor
> > > > > >
> > > > > >Co-Founder & CTO | Equalum
> > > > > >
> > > > > >Mobile: +972-54-7801286 <+972%2054-780-1286>
> <+972%2054-780-1286> |
> > > Email:
> > > > > ofir.ma...@equalum.io
> > > > > >
> > > > > >On Sun, Oct 2, 2016 at 11:23 PM, Harsha Chintalapani <
> > ka...@harsha.io
> > > >
> > > > > >wrote:
> > > > > >
> > > > > >> Neha & Jay,
> > > > > >>                  We did look at the open source alternatives.
> Our
> > > > > >>concern
> > > > > >> is what's the patch acceptance and adding features/ bug-fixes to
> > the
> > > > > >> existing project under a Github (although it's licensed under
> > Apache
> > > > > >>2.0).
> > > > > >> It would be great if that project made available under Apache
> and
> > > > > >>driven by
> > > > > >> the community.  Adding to the above, not all Kafka users are
> > > > interested
> > > > > >>in
> > > > > >> using the Java client API, they would like to have simple REST
> API
> > > > where
> > > > > >> they can code against using any language. I do believe this adds
> > > value
> > > > > >>to
> > > > > >> Apache Kafka in itself.
> > > > > >>
> > > > > >> "For 1, I don't think there is value in giving in to the NIH
> > > syndrome
> > > > > >>and
> > > > > >> reinventing the wheel. What I'm looking for is a detailed
> > comparison
> > > > of
> > > > > >>the
> > > > > >> gaps and why those can't be improved in the REST proxy that
> > already
> > > > > >>exists
> > > > > >> and is actively maintained."
> > > > > >>
> > > > > >> We are not looking at this as  NIH. What we are worried about
> is a
> > > > > >>project
> > > > > >> that's not maintained in a community. So the process of
> accepting
> > > > > >>patches
> > > > > >> and priorities is not clear, and it's not developed in Apache
> > > > community.
> > > > > >> Not only that, existing REST API project doesn't support new
> > client
> > > > API
> > > > > >>and
> > > > > >> hence there is no security support either.
> > > > > >> We don't know the timeline when that's made available. We would
> > like
> > > > to
> > > > > >>add
> > > > > >> admin functionality into the REST API. So the Roadmap of that
> > > project
> > > > is
> > > > > >> not driven by Apache.
> > > > > >>
> > > > > >>
> > > > > >> "This doesn't materially have an impact on expanding the
> usability
> > > of
> > > > > >>    Kafka. In my experience, REST proxy + Java clients only cover
> > > ~50%
> > > > of
> > > > > >> all
> > > > > >>    Kafka users, and maybe 10% of those are the ones who will use
> > the
> > > > > >>REST
> > > > > >>    proxy. The remaining 50% are non-java client users (C,
> python,
> > > go,
> > > > > >>node
> > > > > >>    etc)."
> > > > > >>
> > > > > >> REST API is most often asked feature in my interactions with
> Kafka
> > > > > >>users.
> > > > > >> In an organization, There will be independent teams who will
> write
> > > > their
> > > > > >>  Kafka clients using different language libraries available
> today,
> > > and
> > > > > >> there is no way to standardize this. Instead of supporting
> several
> > > > > >> different client libraries users will be interested in using a
> > REST
> > > > API
> > > > > >> server. The need for a REST API will only increase as more and
> > more
> > > > > >>users
> > > > > >> start using Kafka.
> > > > > >>
> > > > > >> "More surface area means more work to keep things consistent.
> > > Failure
> > > > > >>    to do that has, in fact, hurt the user experience."
> > > > > >> Having myriad Kafka client GitHub projects that support
> different
> > > > > >>languages
> > > > > >> hurts the user experience and pushes burden to maintain these
> > > > libraries.
> > > > > >> REST API is a simple code base that uses existing java client
> > > > libraries
> > > > > >>to
> > > > > >> make life easier for the users.
> > > > > >>
> > > > > >> Thanks,
> > > > > >> Harsha
> > > > > >>
> > > > > >> On Sat, Oct 1, 2016 at 10:41 AM Neha Narkhede <
> n...@confluent.io>
> > > > > wrote:
> > > > > >>
> > > > > >> > Manikumar,
> > > > > >> >
> > > > > >> > Thanks for sharing the proposal. I think there are 2 parts to
> > this
> > > > > >> > discussion -
> > > > > >> >
> > > > > >> > 1. Should we rewrite a REST proxy given that there is a
> > > > > >>feature-complete,
> > > > > >> > open-source and actively maintained REST proxy in the
> community?
> > > > > >> > 2. Does adding a REST proxy to Apache Kafka make us more agile
> > and
> > > > > >> maintain
> > > > > >> > the high-quality experience that Kafka users have today?
> > > > > >> >
> > > > > >> > For 1, I don't think there is value in giving in to the NIH
> > > syndrome
> > > > > >>and
> > > > > >> > reinventing the wheel. What I'm looking for is a detailed
> > > comparison
> > > > > >>of
> > > > > >> the
> > > > > >> > gaps and why those can't be improved in the REST proxy that
> > > already
> > > > > >> exists
> > > > > >> > and is actively maintained. For example, we depend on zkClient
> > and
> > > > > >>have
> > > > > >> > found as well as fixed several bugs by working closely with
> the
> > > > people
> > > > > >> who
> > > > > >> > maintain zkClient. This should be possible for REST proxy as
> > well,
> > > > > >>right?
> > > > > >> >
> > > > > >> > For 2, I'd like us to review our history of expanding the
> > surface
> > > > > >>area to
> > > > > >> > add more clients in the past. Here is a summary -
> > > > > >> >
> > > > > >> >    - This doesn't materially have an impact on expanding the
> > > > > >>usability of
> > > > > >> >    Kafka. In my experience, REST proxy + Java clients only
> cover
> > > > ~50%
> > > > > >>of
> > > > > >> > all
> > > > > >> >    Kafka users, and maybe 10% of those are the ones who will
> use
> > > the
> > > > > >>REST
> > > > > >> >    proxy. The remaining 50% are non-java client users (C,
> > python,
> > > > go,
> > > > > >> node
> > > > > >> >    etc).
> > > > > >> >    - People are a lot more excited about promising to
> contribute
> > > > while
> > > > > >> >    adding the surface area but not on an ongoing basis down
> the
> > > > line.
> > > > > >> >    - More surface area means more work to keep things
> > consistent.
> > > > > >>Failure
> > > > > >> >    to do that has, in fact, hurt the user experience.
> > > > > >> >    - More surface area hurts agility. We want to do a few
> things
> > > > > >>really
> > > > > >> >    well as well as be agile to be able to build on our core
> > > > > >>competency.
> > > > > >> >
> > > > > >> >
> > > > > >> > On Sat, Oct 1, 2016 at 5:38 AM Manikumar <
> > > manikumar.re...@gmail.com
> > > > >
> > > > > >> > wrote:
> > > > > >> >
> > > > > >> > > Hi Jay,
> > > > > >> > >
> > > > > >> > > Thanks for your reply.
> > > > > >> > >
> > > > > >> > > I agree that we can not add all the clients/tools available
> in
> > > > > >> ecosystem
> > > > > >> > > page to Kafka repo itself. But we feel REST Interface is
> > > different
> > > > > >>from
> > > > > >> > > other clients/tools. Since any language that can work with
> > HTTP
> > > > can
> > > > > >> > > easily integrate with this interface, Having an "official"
> > REST
> > > > > >> > > interface helps user community. This also helps us to
> > integrate
> > > > well
> > > > > >> > > with external management and provisioning tools.  Apache
> Kafka
> > > > > >>release
> > > > > >> > > with Java clients + REST interface is sufficient for most of
> > the
> > > > > >>user
> > > > > >> > > deployments/requirements. This helps users to deal with less
> > > > number
> > > > > >> > > of distributions/builds.
> > > > > >> > >
> > > > > >> > > Thanks,
> > > > > >> > > Manikumar
> > > > > >> > >
> > > > > >> > >
> > > > > >> > > On Sat, Oct 1, 2016 at 4:24 AM, Jay Kreps <j...@confluent.io
> >
> > > > wrote:
> > > > > >> > >
> > > > > >> > > > Hey guys,
> > > > > >> > > >
> > > > > >> > > > There's already a REST interface maintained as a separate
> > > > > >> project--it's
> > > > > >> > > > open source and apache licensed and actively maintained (
> > > > > >> > > > https://github.com/confluentinc/kafka-rest). What is
> wrong
> > > with
> > > > >
> > > > >
> > > > >
> > > > > GitHub - confluentinc/kafka-rest: REST Proxy for Kafka
> > > > > github.com
> > > > > The Kafka REST Proxy provides a RESTful interface to a Kafka
> cluster.
> > > It
> > > > > makes it easy to produce and consume messages, view the state of
> the
> > > > > cluster, and ...
> > > > >
> > > > > >> that?
> > > > > >> > > You
> > > > > >> > > > mentioned that there was some compatibility concern, but
> > > > > >> compatibility
> > > > > >> > > has
> > > > > >> > > > to do with the consumer protocol guarantees not the repo
> the
> > > > code
> > > > > >>is
> > > > > >> > in,
> > > > > >> > > > right? Not sure that concern makes sense.
> > > > > >> > > >
> > > > > >> > > > We could argue for adding pretty much anything and
> > everything
> > > in
> > > > > >>the
> > > > > >> > > > ecosystem page in Kafka itself but I'm not sure that would
> > > make
> > > > > >>the
> > > > > >> > > project
> > > > > >> > > > more agile.
> > > > > >> > > >
> > > > > >> > > > -Jay
> > > > > >> > > >
> > > > > >> > > > On Wed, Sep 28, 2016 at 12:04 AM, Manikumar <
> > > > > >> manikumar.re...@gmail.com
> > > > > >> > >
> > > > > >> > > > wrote:
> > > > > >> > > >
> > > > > >> > > > > Hi Kafka Devs,
> > > > > >> > > > >
> > > > > >> > > > > I created KIP-80 to add Kafka REST Server to Kafka
> > > Repository.
> > > > > >> > > > >
> > > > > >> > > > > There are already open-source alternatives are
> available.
> > > But
> > > > > >>we
> > > > > >> > would
> > > > > >> > > > > like to add REST server that
> > > > > >> > > > > many users ask for under Apache Kafka repo. Many data
> > Infra
> > > > > >>tools
> > > > > >> > comes
> > > > > >> > > > up
> > > > > >> > > > > with Rest Interface.
> > > > > >> > > > > It is useful to have inbuilt Rest API support for
> Produce,
> > > > > >>Consume
> > > > > >> > > > messages
> > > > > >> > > > > and admin interface for
> > > > > >> > > > > integrating with external management and provisioning
> > > > tools.This
> > > > > >> will
> > > > > >> > > > also
> > > > > >> > > > > allow the maintenance of
> > > > > >> > > > > REST server and adding new features makes it easy
> because
> > > > apache
> > > > > >> > > > community.
> > > > > >> > > > >
> > > > > >> > > > > The KIP wiki is the following:
> > > > > >> > > > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > > > > >> > > > > 80%3A+Kafka+Rest+Server
> > > > > >> > > > >
> > > > > >> > > > > Your comments and feedback are welcome.
> > > > > >> > > > >
> > > > > >> > > > > Thanks,
> > > > > >> > > > > Manikumar
> > > > > >> > > > >
> > > > > >> > > >
> > > > > >> > >
> > > > > >> > --
> > > > > >> > Thanks,
> > > > > >> > Neha
> > > > > >> >
> > > > > >>
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-- 
Nacho (Ignacio) Solis
Kafka
nso...@linkedin.com

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