[VOTE] 1.0.0 RC3

[Guozhang Wang]

Hello Kafka users, developers and client-developers,

This is the third candidate for release of Apache Kafka 1.0.0. The main PRs that gets merged in after RC1 are the following:

https://github.com/apache/kafka/commit/dc6bfa553e73ffccd1e604963e076c78d8ddcd69

It's worth noting that starting in this version we are using a different version protocol with three digits: major.minor.bug-fix

Any and all testing is welcome, but the following areas are worth highlighting:

1. Client developers should verify that their clients can produce/consume
to/from 1.0.0 brokers (ideally with compressed and uncompressed data).
2. Performance and stress testing. Heroku and LinkedIn have helped with
this in the past (and issues have been found and fixed).
3. End users can verify that their apps work correctly with the new release.

This is a major version release of Apache Kafka. It includes 29 new KIPs. See the release notes and release plan (https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=71764913) for more details. A few feature highlights:

* Java 9 support with significantly faster TLS and CRC32C implementations
* JBOD improvements: disk failure only disables failed disk but not the broker (KIP-112/KIP-113 part I)

* Controller improvements: reduced logging change to greatly accelerate admin request handling.
* Newly added metrics across all the modules (KIP-164, KIP-168, KIP-187, KIP-188, KIP-196) 
* Kafka Streams API improvements (KIP-120 / 130 / 138 / 150 / 160 / 161), and drop compatibility "Evolving" annotations 

Release notes for the 1.0.0 release:
http://home.apache.org/~guozhang/kafka-1.0.0-rc3/RELEASE_NOTES.html

*** Please download, test and vote by Friday, October 20, 8pm PT

Kafka's KEYS file containing PGP keys we use to sign the release:
http://kafka.apache.org/KEYS

* Release artifacts to be voted upon (source and binary):
http://home.apache.org/~guozhang/kafka-1.0.0-rc3/

* Maven artifacts to be voted upon:
https://repository.apache.org/content/groups/staging/org/apache/kafka/

* Javadoc:
http://home.apache.org/~guozhang/kafka-1.0.0-rc3/javadoc/

* Tag to be voted upon (off 1.0 branch) is the 1.0.0-rc2 tag:

https://git-wip-us.apache.org/repos/asf?p=kafka.git;a=tag;h=7774b0da8ead0d9edd1d4b2f7e1cd743af694112

* Documentation:
Note the documentation can't be pushed live due to changes that will not go
live until the release. You can manually verify by downloading
http://home.apache.org/~guozhang/kafka-1.0.0-rc3/kafka_2.11-1.0.0-site-docs.tgz

I will update this thread with up coming Jenkins builds for this RC later, they are currently being executed and will be done tomorrow.

/**************************************


Thanks,

-- Guozhang

[Dana Powers]

+1. passed kafka-python integration tests, and manually verified producer/consumer on both compressed and non-compressed data.

-Dana

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