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From: Jake Farrell <jfarrell@apache.org>
Date: Mon, 19 Jun 2017 09:15:01 -0400
Message-ID: <CANyrgvfkU1g5-DpDDM5KHhbW_YZ9JOud=8a-1mOP9TcN4xYUvw@mail.gmail.com>
Subject: Re: [VOTE] Heron to enter Apache Incubator
To: "general@incubator.apache.org" <general@incubator.apache.org>
Cc: billgraham@gmail.com
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archived-at: Mon, 19 Jun 2017 13:15:08 -0000

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Thanks John
Comments inline, will ensure that your points are addressed before the
first release candidate.

-Jake


On Sun, Jun 18, 2017 at 6:35 AM, John D. Ament <johndament@apache.org>
wrote:

> +1, however a few things to note about the proposal (and follow up will b=
e
> required when bringing Heron in):
>
> - There is no ASF 2.0 license (missed when putting together the proposal)
>

Will ensure that all licensing checkboxes are addressed before the first
release candidate goes up for a vote.


- The IP section doesn't mention anything about a SGA being sent, is your
> intention to not send an SGA?
>

SGA is not required to be filed prior to an incubator acceptance vote, it
is 100% required before the codebase can be imported by infra, which the
mentors will ensure does occur. (i've all ready asked the project to get
this rolling)


> - The NOTICE for the repo indicates there is some source code from Yahoo!=
.
> - The contents of
> https://github.com/twitter/heron/tree/master/third_party seems
> to be mostly binary files, and you'll need to clean that up for your firs=
t
> release.
> - Your 3rd party section mentions everything is ASF 2.0, however this
> includes glog and similar tools that include an odd buildchain license th=
at
> is actually GPL, we'll need to get clearance if this is actually complian=
t
> or not.  Some of the contents in third_party are missing license headers.
>
>
This is similar to other projects using a local third_party cache directory
that have come to the Apache Incubator, Cassandra, Mesos and Aurora are a
couple that jump into mind. We will ensure that this is addressed and that
no source release contains any of these files.


> John
>
> On Fri, Jun 16, 2017 at 4:41 PM Bill Graham <billgraham@gmail.com> wrote:
>
> > Hi,
> >
> > Based on the discussion on the incubator mailing list[1] I would like t=
o
> > call a vote to add Heron to the Apache Incubator.
> >
> > The full proposal is available below, and is also available on the Apac=
he
> > Incubator wiki at:
> >     https://wiki.apache.org/incubator/HeronProposal
> >
> > Please vote:
> >   [ ] +1, bring Heron into Incubator
> >   [ ] -1, do not bring Heron into Incubator, because...
> >
> > The vote will open for 7 days until Friday June 23 at 14:00 PT.
> >
> > Thank you
> >
> > 1 -
> >
> > https://lists.apache.org/thread.html/fb91f527ef479bb5df45bf2c9d93b7
> 786c3fa6cdbfeba3128599df79@%3Cgeneral.incubator.apache.org%3E
> >
> >
> >
> > =3D Heron Proposal =3D
> >
> > =3D Abstract =3D
> > Heron is a real-time, distributed, fault-tolerant stream processing
> engine
> > initially developed by Twitter.
> >
> > =3D Proposal =3D
> >
> > Heron is a real-time stream processing engine built for high performanc=
e,
> > ease of manageability, performance predictability and developer
> > productivity[1]. We wish to develop a community around Heron to increas=
e
> > contributions and see Heron thrive in an open forum.
> >
> > =3D Background =3D
> >
> > Heron provides the ability for developers to compose directed acyclic
> > graphs (DAGs) of real-time query execution logic (i.e. a topology) and
> > submit the topology to execute on a pluggable job scheduling system
> (e.g.,
> > Apache Aurora, YARN, Marathon, etc). Users can employ either the native
> > Heron API or the Apache Storm API to develop the topology. Heron suppor=
ts
> > the Storm API for ease of migration, but beyond that Heron=E2=80=99s ar=
chitecture
> > differs considerably from Storm=E2=80=99s.
> >
> > Users submit a topology to the scheduler using the Heron client, which
> uses
> > the Heron binary libraries to deploy all daemons required to run and
> manage
> > the topology. The topology therefore has no reliance on centrally manag=
ed
> > Heron services, only on a generic job scheduling system, which lends
> itself
> > well to be run on top of Apache Aurora/Mesos or Apache Hadoop/YARN (amo=
ng
> > others).
> >
> > The scheduler runs each topology as a job consisting of multiple
> > containers. One of the containers runs the topology master, responsible
> for
> > managing the topology. The remaining containers each runs a stream
> manager
> > responsible for data routing, a metrics manager that collects and repor=
ts
> > various metrics and a number of processes called Heron instances which
> run
> > the user-defined logic on the stream of tuples. Parallelism is achieved
> via
> > process-based isolation of Heron instances, which provides predictable
> > performance while simplifying debugging. The containers are allocated a=
nd
> > managed by the scheduler framework based on resource availability of
> nodes
> > in the cluster. The metadata for the topology, such as the physical pla=
n
> > and execution details, are stored in the pluggable Heron State Manager
> > (e.g. Apache ZooKeeper).
> >
> > =3D Rationale =3D
> >
> > Heron is a general-purpose, modular and extensible platform that can be
> > leveraged to support common, real-time analytics use cases. There is an
> > increasing demand for open-source, scalable real-time analytics systems=
.
> We
> > believe that Heron can be leveraged by other organizations to build
> > streaming applications that can benefit from its robustness, high
> > performance, adaptability to cloud environments and ease of use.
> Moreover,
> > we hope that open-sourcing Heron will help to further evolve the
> technology
> > as the project attracts contributors with diverse backgrounds and areas
> of
> > expertise.
> >
> > We believe the Apache foundation is a great fit as the long-term home f=
or
> > Heron, as it provides an established process for community-driven
> > development and decision making by consensus. This is exactly the model
> we
> > want for future Heron development.
> >
> > =3D Initial Goals =3D
> >
> >  * Move the existing codebase, website, documentation, and mailing list=
s
> to
> > Apache-hosted infrastructure.
> >  * Integrate with the Apache development process.
> >  * Ensure all dependencies are compliant with Apache License version 2.=
0.
> >  * Incrementally develop and release per Apache guidelines.
> >
> > =3D Current Status =3D
> >
> > Heron is a stable project used in production at Twitter since 2014 and
> open
> > sourced under the ASL v2 license in 2016. The Heron source code is
> > currently hosted at github.com (https://github.com/twitter/heron), whic=
h
> > will seed the Apache git repository.
> >
> > =3D Meritocracy =3D
> >
> > By submitting this incubator proposal, we=E2=80=99re expressing our int=
ent to
> build
> > a diverse developer community around Heron that will conduct itself
> > according to The Apache Way and use a meritocratic means of building it=
's
> > committer base. Several companies and universities have already express=
ed
> > interest in and contributed to Heron. Our goal is to grow the Heron
> > community by encouraging open communication, contribution and
> participation
> > of all types, and ensuring that contributors are recognized
> appropriately.
> >
> > =3D Community =3D
> >
> > Heron is currently being used by Twitter, Google, Machine Zone and
> > ndustrial.io and has received significant contributions by Microsoft an=
d
> > Streamlio. By bringing Heron into the Apache ecosystem, we believe we c=
an
> > attract even more developers who are interested in creating real-time
> > systems to build the project's contributor base.
> >
> > =3D=3D Core Developers =3D=3D
> >
> > Current core developers are engineers from Twitter, Google, Microsoft a=
nd
> > Streamlio.
> >
> > =3D=3D Alignment =3D=3D
> >
> > Heron utilizes a number of Apache technologies. Heron leverages Apache
> > ZooKeeper for coordination and has scheduler implementations to integra=
te
> > with Apache Mesos, Apache Aurora and Apache Hadoop's YARN (via Apache
> REEF)
> > as well as spout implementations to integrate with Apache Kafka and
> metrics
> > implementations to integrate with Scribe. Heron also implements the
> Apache
> > Storm user-level API, which allows topologies written against Storm to
> run
> > in Heron. We believe that having Heron at Apache will help further the
> > growth of the streaming compute community, as well as encourage
> cooperation
> > and developer cross pollination with other Apache projects.
> >
> > =3D Known Risks =3D
> >
> > =3D=3D Orphaned Products =3D=3D
> >
> > The risk of the Heron project being abandoned is minimal. It is used in
> > production at Twitter and Google and other companies are evaluating or
> > adopting it for production use.
> >
> > =3D=3D Inexperience with Open Source =3D=3D
> >
> > All of the core contributors to the project have considerable experienc=
e
> > with open source software development. Bill Graham[2], Ashvin Agrawal[3=
]
> > and Supun Kamburugamuve[4], committers on the project, are PMCs on othe=
r
> > Apache projects and Bill and Ashvin have gone through the Apache
> incubator
> > process. Twitter has already donated numerous projects to the ASF (e.g.=
,
> > Apache Mesos, Apache Aurora, Apache Parquet). We also plan to be mentor=
ed
> > by experienced ASF members that can help with any roadblocks.
> >
> > =3D=3D Homogenous Developers =3D=3D
> >
> > Initial committers come from 5 separate organizations. Our intention is
> > increase the diversity of contributing developers and their affiliation=
s.
> > To date github contributions have come from approximately 50 contributo=
rs
> > from outside the Twitter team.
> >
> > =3D=3D Reliance on Salaried Developers =3D=3D
> >
> > It is expected that Heron development will occur on both salaried time
> and
> > on volunteer time. The majority of initial committers are paid by their
> > employers to contribute to this project. We are committed to recruiting
> > additional committers from other organizations as well as non-salaried
> > committers to join project.
> >
> > =3D=3D Relationships with Other Apache Products =3D=3D
> >
> > As mentioned in the Alignment section, Heron implements the Apache Stor=
m
> > API and integrates with multiple Apache schedulers (Apache Mesos, Apach=
e
> > Aurora and Apache Hadoop's YARN) as well as Apache ZooKeeper and Apache
> > Thrift.
> >
> > =3D=3D An Excessive Fascination with the Apache Brand =3D=3D
> >
> > Heron's popularity is growing in the streaming compute space and we are
> > long time supporters of the Apache brand. This proposal is not for the
> > purpose of generating publicity through. Rather, the primary benefits t=
o
> > joining Apache are those of community building and open decision making
> > outlined in the Rationale section.
> >
> > =3D=3D Documentation =3D=3D
> >
> > This proposal exists online as
> > http://wiki.apache.org/incubator/HeronProposal. Extensive documentation
> > can
> > be found on github at https://twitter.github.io/heron and the source
> code
> > is well documented.
> >
> > =3D=3D Source and Intellectual Property Submission Plan =3D=3D
> >
> > The Heron codebase is currently hosted on Github:
> > https://github.com/twitter/heron. During incubation, the codebase will
> be
> > migrated to Apache infrastructure. The source code is already ASF 2.0
> > licensed.
> >
> > =3D=3D External Dependencies =3D=3D
> >
> > All external libraries have ASF 2.0 compatible licenses except for
> pylint.
> > The pylint library is GPL licensed, but is only used for pre-build Pyth=
on
> > style checks and is neither bundled with, nor relied upon by, the Heron
> > source or binary release artifacts.
> >
> > =3D=3D Cryptography =3D=3D
> >
> > Heron does not use any cryptography libraries.
> >
> > =3D Required Resources =3D
> >
> > =3D=3D Mailing lists =3D=3D
> >
> >  * private@heron.incubator.apache.org (with moderated subscriptions)
> >  * dev@heron.incubator.apache.org
> >  * commits@heron.incubator.apache.org
> >  * user@heron.incubator.apache.org
> >
> > =3D=3D Subversion Directory =3D=3D
> >
> > Git is the preferred source control system: git://git.apache.org/heron
> >
> > =3D=3D Issue Tracking =3D=3D
> >
> > JIRA: Heron (HERON)
> >
> > =3D=3D Initial Committers =3D=3D
> >
> >  * Andrew Jorgensen (andrew at andrewjorgensen dot com)
> >  * Ashvin Agrawal (ashvin at apache dot org)*
> >  * Avrilia Floratou (avrilia dot floratou at gmail dot com)
> >  * Bill Graham (billgraham at apache dot org)*
> >  * Brian Hatfield (bmhatfield at gmail dot com)
> >  * Chris Kellogg (cckellogg at gmail dot com)
> >  * Huijun Wu (huijun dot wu dot 2010 at gmail dot com)
> >  * Karthik Ramasamy (karthik at gmail dot com)
> >  * Maosong Fu (maosongfu at gmail dot com)
> >  * Neng Lu(freeneng at gmail dot com)
> >  * Runhang Li (obj dot runhang at gmail dot com)
> >  * Sanjeev Kulkarni (sanjeevrk at gmail dot com)
> >  * Supun Kamburugamuve (supun at apache dot org)*
> >  * Thomas Sun (tom dot ssf at gmail dot com)
> >  * Yaliang Wang (yaliang dot w dot wang at ieee dot org)
> >
> > =3D=3D Affiliations =3D=3D
> >
> >  * Andrew Jorgensen (Google)
> >  * Ashvin Agrawal (Microsoft)
> >  * Avrilia Floratou (Microsoft)
> >  * Bill Graham (Twitter)
> >  * Brian Hatfield (Google)
> >  * Chris Kellogg (Twitter)
> >  * Huijun Wu (Twitter)
> >  * Karthik Ramasamy (Streamlio)
> >  * Maosong Fu (Twitter)
> >  * Neng Lu (Twitter)
> >  * Runhang Li (Twitter)
> >  * Sanjeev Kulkarni (Streamlio)
> >  * Supun Kamburugamuve (Indiana University)
> >  * Thomas Sun (Twitter)
> >  * Yaliang Wang (Twitter)
> >
> > =3D Sponsors =3D
> >
> > =3D=3D Champion =3D=3D
> >
> >  * Julien Le Dem (julien at apache dot org)
> >
> > =3D=3D Nominated Mentors =3D=3D
> >
> >  * Jake Farrell (jfarrell at apache dot org)
> >  * Jacques Nadeau (jacques at apache dot org)
> >  * Julien Le Dem (julien at apache dot org)
> >  * P. Taylor Goetz (ptgoetz at apache dot org)
> >
> > =3D=3D Sponsoring Entity =3D=3D
> >
> > The Apache Incubator
> >
> > =3D=3D Footnotes =3D=3D
> >
> >  * 1 - Papers detailing Heron are available at
> > http://dl.acm.org/citation.cfm?id=3D2742788 and
> > http://sites.computer.org/debull/A15dec/p15.pdf.
> >  * 2 - http://home.apache.org/phonebook.html?uid=3Dbillgraham
> >  * 3 - http://home.apache.org/phonebook.html?uid=3Dashvin
> >  * 4 - http://home.apache.org/phonebook.html?uid=3Dsupun
> >
>

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