[ANNOUNCE] Weekly Community Update 2020/03

[Konstantin Knauf-3]

Dear community,

happy to share this week's weekly community digest with a release candidate
for Flink 1.10, a Pulsar Catalog for Flink, a 50% discount code for Flink
Forward SF and bit more.

Flink Development
==============

* [releases] The first (preview)* release candidate for Flink 1.10* has
been created. Every help in testing the release candidate is highly
appreciated. [1]

* [sql] I believe I have never covered the contribution of a *Pulsar
Catalog* to Flink's SQL ecosystem in the past. So here it is. Apache Pulsar
includes a schema registry out-of-the-box. With Flink's Pulsar catalog,
Pulsar topics will automatically available as tables in Flink. Pulsar
namespaces are mapped to databases in Flink. [2,3]

* [deployment] End of last year Patrick Lucas had started a discussion on
integrating the *Flink Docker images *into the Apache Flink project. The
discussion has stalled a bit by now, but there seems to be a consensus that
a) the Flink Docker images should move to Apache Flink and b) the
Dockerfiles in apache/flink need to be consolidated. [4]

* [statebackends] When using the *RocksDbStatebackend Timer* state is
currently - by default - still stored on the Java heap. Stephan proposes to
change this behaviour to store Timers in RocksDB by default and has
received a lot of positive feedback. [5]

[1]
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/ANNOUNCE-Apache-Flink-1-10-0-release-candidate-0-tp36770.html
[2]
https://docs.google.com/document/d/1LMnABtXn-wQedsmWv8hopvx-B-jbdr8-jHbIiDhdsoE/edit
[3]
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-FLIP-72-Introduce-Pulsar-Connector-tp33283.html
[4]
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-Integrate-Flink-Docker-image-publication-into-Flink-release-process-tp36139.html
[5]
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/DISCUSS-Change-default-for-RocksDB-timers-Java-Heap-in-RocksDB-tp36720.html

Notable Bugs
==========

* [FLINK-15577] [1.9.1] When using two different windows within on SQL
query, Flink might generate an invalid physical execution plan as it
incorrectly considers the two window transformations equivalent. More
details in the ticket. [6]

[6] https://issues.apache.org/jira/browse/FLINK-15577

Events, Blog Posts, Misc
===================

* *Dian Fu* is now an Apache Flink Comitter. Congratulations! [7]

* *Bird *has published an in-depth blog post on how they use Apache Flink
to detect offline scooters. [8]

* On the Flink Blog, Alexander Fedulov has published a first blog post of a
series on how to implement a *financial fraud detection use case* with
Apache Flink. [9]

* The extended *Call for Presentations for Flink Forward San Francisco*
ends today. Make sure to submit your talk in time. [10,11]

* Still on the fence whether to attend *Flink Forward San Francisco*? Let
me help you with that: when registering use discount code
*FFSF20-MailingList* to get a * 50% discount* on your conference ticket.

* Upcoming Meetups
   * On January 22 my colleague *Alexander Fedulov *will talk about Fraud
Detection with Apache Flink at the Apache Flink Meetup in Madrid [12].
   * On February 6 *Alexander Fedulov *will talk about Stateful Stream
Processing with Apache Flink at the R-Ladies meetup in Kiew. [13]

[7]
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/ANNOUNCE-Dian-Fu-becomes-a-Flink-committer-tp36696p36760.html
[8]
https://medium.com/bird-engineering/replayable-process-functions-in-flink-time-ordering-and-timers-28007a0210e1
[9] https://flink.apache.org/news/2020/01/15/demo-fraud-detection.html
[10]
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/ANNOUNCE-Flink-Forward-San-Francisco-2020-Call-for-Presentation-extended-tp36595.html
[11] https://www.flink-forward.org/sf-2020
[12]
https://www.meetup.com/Meetup-de-Apache-Flink-en-Madrid/events/267744681/
[13] https://www.meetup.com/rladies-kyiv/events/267948988/

Cheers,

Konstantin (@snntrable)

--

Konstantin Knauf | Solutions Architect

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