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commit 8552f270fd5aef2bb248a3b560ce15cf6339845f
Author: Marta Paes Moreira <marta.paes.more...@gmail.com>
AuthorDate: Tue Mar 31 00:54:34 2020 +0200
Re-adding the community update blogpost.
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+---
+layout: post
+title: "Flink Community Update - April'20"
+date: 2020-04-01T08:00:00.000Z
+categories: news
+authors:
+- morsapaes:
+ name: "Marta Paes"
+ twitter: "morsapaes"
+
+excerpt: While things slow down around us, the Apache Flink community is
privileged to remain as active as ever. This blogpost combs through the past
few months to give you an update on the state of things in Flink — from core
releases to Stateful Functions; from some good old community stats to a new
development blog.
+---
+
+While things slow down around us, the Apache Flink community is privileged to
remain as active as ever. This blogpost combs through the past few months to
give you an update on the state of things in Flink — from core releases to
Stateful Functions; from some good old community stats to a new development
blog.
+
+And since now it's more important than ever to keep up the spirits, we’d like
to invite you to join the [Flink Forward Virtual
Conference](https://www.flink-forward.org/sf-2020), on April 22-24 (see
[Upcoming Events](#upcoming-events)). Hope to see you there!
+
+{% toc %}
+
+# The Year (so far) in Flink
+
+## Flink 1.10 Release
+
+To kick off the new year, the Flink community [released Flink
1.10](https://flink.apache.org/news/2020/02/11/release-1.10.0.html) with the
record contribution of over 200 engineers. This release introduced significant
improvements to the overall performance and stability of Flink jobs, a preview
of native Kubernetes integration and advances in Python support (PyFlink).
Flink 1.10 also marked the completion of the [Blink
integration](https://flink.apache.org/news/2019/08/22/release-1.9.0. [...]
+
+The community is now discussing the [release of Flink
1.10.1](http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-Releasing-Flink-1-10-1-td38689.html#a38690),
covering some outstanding bugs from Flink 1.10.
+
+## Stateful Functions Contribution and 2.0 Release
+
+Last January, the first version of Stateful Functions
([statefun.io](https://statefun.io/)) code was pushed to the [Flink
repository](https://github.com/apache/flink-statefun). Stateful Functions
started out as an API to build general purpose event-driven applications on
Flink, taking advantage of its advanced state management mechanism to cut the
“middleman” that usually handles state coordination in such applications (e.g.
a database).
+
+In a [recent
update](http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-Update-on-Flink-Stateful-Functions-what-are-the-next-steps-tp38646.html),
some new features were announced, like multi-language support (including a
Python SDK), function unit testing and Stateful Functions’ own flavor of the
[State Processor
API](https://ci.apache.org/projects/flink/flink-docs-stable/dev/libs/state_processor_api.html).
The release cycle will be independent from core Flink release [...]
+
+## Building up to Flink 1.11
+
+Amidst the usual outpour of discussion threads, JIRA tickets and FLIPs, the
community is working full steam on bringing Flink 1.11 to life in the next few
months. The feature freeze is currently scheduled for late April, so the
release is expected around mid May.
+The upcoming release will focus on new features and integrations that broaden
the scope of Flink use cases, as well as core runtime enhancements to
streamline the operations of complex deployments.
+
+Some of the plans on the use case side include support for changelog streams
in the Table API/SQL
([FLIP-105](https://cwiki.apache.org/confluence/display/FLINK/FLIP-105%3A+Support+to+Interpret+and+Emit+Changelog+in+Flink+SQL)),
easy streaming data ingestion into Apache Hive
([FLIP-115](https://cwiki.apache.org/confluence/display/FLINK/FLIP-115%3A+Filesystem+connector+in+Table))
and support for Pandas DataFrames in PyFlink. On the operational side, the
much anticipated new Source API ([FL [...]
+
+Throw into the mix improvements around type systems, the WebUI, metrics
reporting and supported formats, this release is bound to keep the community
busy. For a complete overview of the ongoing development, check [this
discussion](http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-Features-of-Apache-Flink-1-11-td38724.html#a38793)
and follow the weekly updates on the Flink [@community mailing
list](https://flink.apache.org/community.html#mailing-lists).
+
+## New Committers and PMC Members
+
+The Apache Flink community has welcomed **1 PMC (Project Management Committee)
Member** and **5 new Committers** since the last update (September 2019):
+
+### New PMC Members
+ Jark Wu
+
+### New Committers
+ Zili Chen, Jingsong Lee, Yu Li, Dian Fu, Zhu Zhu
+
+Congratulations to all and thank you for your hardworking commitment to Flink!
+
+# The Bigger Picture
+
+## A Look into the Flink Repository
+
+In the [last
update](https://flink.apache.org/news/2019/09/10/community-update.html), we
shared some numbers around Flink releases and mailing list activity. This time,
we’re looking into the activity in the Flink repository and how it’s evolving.
+
+<center>
+<img src="{{ site.baseurl
}}/img/blog/2020-03-30-flink-community-update/2020-03-30-flink-community-update_1.png"
width="725px" alt="GitHub 1"/>
+</center>
+
+There is a clear upward trend in the number of contributions to the
repository, based on the number of commits. This reflects the **fast pace of
development** the project is experiencing and also the **successful integration
of the China-based Flink contributors** started early last year. To complement
these observations, the repository registered a **1.5x increase in the number
of individual contributors in 2019**, compared to the previous year.
+
+But did this increase in capacity produce any other measurable benefits?
+
+<center>
+<img src="{{ site.baseurl
}}/img/blog/2020-03-30-flink-community-update/2020-03-30-flink-community-update_2.png"
width="725px" alt="GitHub 2"/>
+</center>
+
+If we look at the average time of Pull Request (PR) “resolution”, it seems
like it did: **the average time it takes to close a PR these days has been
steadily decreasing** since last year, sitting between 5-6 days for the past
few months.
+
+These are great indicators of the health of Flink as an open source project!
+
+## Flink Community Packages
+
+If you missed the launch of [flink-packages.org](http://flink-packages.org/),
here’s a reminder! Ververica has [created (and open
sourced)](https://www.ververica.com/blog/announcing-flink-community-packages) a
website that showcases the work of the community to push forward the ecosystem
surrounding Flink. There, you can explore existing packages (like the Pravega
and Pulsar Flink connectors, or the Flink Kubernetes operators developed by
Google and Lyft) and also submit your own contrib [...]
+
+## Flink "Engine Room"
+
+The community has recently launched the [“Engine
Room”](https://cwiki.apache.org/confluence/pages/viewrecentblogposts.action?key=FLINK),
a dedicated space in Flink’s Wiki for knowledge sharing between contributors.
The goal of this initiative is to make ongoing development on Flink internals
more transparent across different work streams, and also to help new
contributors get on board with best practices. The first blogpost is already up
and sheds light on the [migration of Flink’s CI in [...]
+
+# Upcoming Events
+
+## Flink Forward Virtual Conference
+
+The organization of Flink Forward had to make the hard decision of cancelling
this year’s event in San Francisco. But all is not lost! **Flink Forward SF
will be held online on April 22-24 and you can register (for free)**
[here](https://www.flink-forward.org/sf-2020). Join the community for
interactive talks and Q&A sessions with core Flink contributors and companies
like Splunk, Lyft, Netflix or Google.
+
+## Others
+
+Events across the globe have come to a halt due to the growing concerns around
COVID-19, so this time we’ll leave you with some interesting content to read
instead. In addition to this written content, you can also recap last year’s
sessions from [Flink Forward
Berlin](https://www.youtube.com/playlist?list=PLDX4T_cnKjD207Aa8b5CsZjc7Z_KRezGz)
and [Flink Forward
China](https://www.youtube.com/playlist?list=PLDX4T_cnKjD3ANoNinSx3Au-poZTHvbF5)!
+
+<table class="table table-bordered">
+ <thead>
+ <tr>
+ <th>Type</th>
+ <th>Links</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td><span class="glyphicon glyphicon glyphicon-bookmark"
aria-hidden="true"></span> Blogposts</td>
+ <td><ul>
+ <li><a
href="https://medium.com/bird-engineering/replayable-process-functions-in-flink-time-ordering-and-timers-28007a0210e1";>Replayable
Process Functions: Time, Ordering, and Timers @Bird</a></li>
+ <li><a
href="https://engineering.salesforce.com/application-log-intelligence-performance-insights-at-salesforce-using-flink-92955f30573f";>Application
Log Intelligence & Performance Insights at Salesforce Using Flink
@Salesforce</a></li>
+ </ul>
+ <ul>
+ <li><a
href="https://flink.apache.org/news/2020/01/29/state-unlocked-interacting-with-state-in-apache-flink.html";>State
Unlocked: Interacting with State in Apache Flink</a></li>
+ <li><a
href="https://flink.apache.org/news/2020/01/15/demo-fraud-detection.html";>Advanced
Flink Application Patterns Vol.1: Case Study of a Fraud Detection
System</a></li>
+ <li><a
href="https://flink.apache.org/news/2020/03/24/demo-fraud-detection-2.html";>Advanced
Flink Application Patterns Vol.2: Dynamic Updates of Application Logic</a></li>
+ <li><a
href="https://flink.apache.org/ecosystem/2020/02/22/apache-beam-how-beam-runs-on-top-of-flink.html";>Apache
Beam: How Beam Runs on Top of Flink</a></li>
+ <li><a
href="https://flink.apache.org/features/2020/03/27/flink-for-data-warehouse.html";>Flink
as Unified Engine for Modern Data Warehousing: Production-Ready Hive
Integration</a></li>
+ </ul>
+ </td>
+ </tr>
+ <tr>
+ <td><span class="glyphicon glyphicon-console" aria-hidden="true"></span>
Tutorials</td>
+ <td><ul>
+ <li><a
href="https://medium.com/@zjffdu/flink-on-zeppelin-part-3-streaming-5fca1e16754";>Flink
on Zeppelin — (Part 3). Streaming</a></li>
+ <li><a
href="https://aws.amazon.com/blogs/big-data/streaming-etl-with-apache-flink-and-amazon-kinesis-data-analytics";>Streaming
ETL with Apache Flink and Amazon Kinesis Data Analytics</a></li>
+ <li><a
href="https://flink.apache.org/news/2020/02/20/ddl.html";>No Java Required:
Configuring Sources and Sinks in SQL</a></li>
+ <li><a
href="https://flink.apache.org/news/2020/02/07/a-guide-for-unit-testing-in-apache-flink.html";>A
Guide for Unit Testing in Apache Flink</a></li>
+ </ul>
+ </td>
+ </tr>
+ </tbody>
+</table>
+
+If you’d like to keep a closer eye on what’s happening in the community,
subscribe to the Flink [@community mailing
list](https://flink.apache.org/community.html#mailing-lists) to get
fine-grained weekly updates, upcoming event announcements and more.
