[ANNOUNCE] Apache Hadoop 3.1.0 release

[Wangda Tan <wh...@gmail.com>]

Hi all,

It gives us great pleasure to announce that the Apache Hadoop community has
voted to release Apache Hadoop 3.1.0.

Hadoop 3.1.0 is the first minor release for the year 2018 in the Hadoop-3.x
line, and brings a number of enhancements.

IMPORTANT NOTES

   - This release is *not* yet ready for production use. Critical issues
   are being ironed out via testing and downstream adoption. Production
users
   should wait for a 3.1.1/3.1.2 release.

The Hadoop community fixed 768 JIRAs (
https://s.apache.org/apache-hadoop-3.1.0-all-tickets) in total as part of
the 3.1.0 release. Of these fixes:
   - 141 in Hadoop Common
   - 266 in HDFS
   - 329 in YARN
   - 32 in MapReduce

Apache Hadoop 3.1.0 contains a number of significant features and
enhancements. A few of
them are noted below.

Hadoop Common

   - HADOOP-14831 / HADOOP-14531 / HADOOP-14825 / HADOOP-14325.
S3/S3A/S3Guard related improvements.

Hadoop HDFS

   - HDFS-9806 - HDFS block replicas to be provided by an external storage
system

Hadoop YARN

   - YARN-6223. First class GPU support on YARN
   - YARN-5983. First class FPGA support on YARN
   - YARN-5079 / YARN-4793 / YARN-4757 / YARN-6419. YARN native service
support
   - YARN-6592. Rich placement constraints in YARN
   - YARN-5881. Enable configuration of queue capacity in terms of absolute
resources for Capacity Scheduler.
   - YARN-7117. Capacity Scheduler: Support auto-creation of leaf queues
while doing queue mapping


Please see the Hadoop 3.1.0 CHANGES (
http://hadoop.apache.org/docs/r3.1.0/hadoop-project-dist/hadoop-common/release/3.1.0/CHANGES.3.1.0.html)
for the detailed list of issues resolved.  The release news is posted on
the Apache Hadoop website too, you can go to the downloads section directly
(http://hadoop.apache.org/releases.html#Download)

Many thanks to everyone who contributed to the release, and everyone in the
Apache Hadoop community! The release is a result of direct and indirect
efforts from many contributors, listed below are the those who contributed
directly by submitting patches.

Aaron Fabbri, Aaron Gresch, Abdullah Yousufi, Ajay Kumar, Ajith S, Akhil
PB, Aki Tanaka, Akira Ajisaka, Alessandro Andrioni, Allen Wittenauer,
Andras Bokor, Andrew Wang, Anis Elleuch, Anu Engineer, Arpit Agarwal, Arun
Suresh, Atul Sikaria, BELUGA BEHR, Bharat Viswanadham, Bibin A Chunda,
Billie Rinaldi, Botong Huang, Brahma Reddy Battula, Carlo Curino, Chandni
Singh, Chang Li, Chao Sun, Charan Hebri, Chen Hongfei, Chen Liang, Chetna
Chaudhari, Chris Douglas, Da Ding, Daniel Templeton, Daryn Sharp, Devaraj
K, Dmitry Chuyko, Ekanth S, Elek,  Marton, Ellen Hui, Eric Badger, Eric
Payne, Eric Yang, Erik Krogen, Esther Kundin, Ewan Higgs, Gabor Bota,
Genmao Yu, Gera Shegalov, Gergely Novák, Gergo Repas, Gour Saha, Greg
Phillips, Grigori Rybkine, Haibo Chen, Haibo Yan, Hanisha Koneru, He
Xiaoqiao, Igor Dvorzhak, Jack Bearden, Jason Lowe, Jian He, Jiandan Yang,
Jianfei Jiang, Jim Brennan, Jinjiang Ling, Joe McDonnell, Johan Gustavsson,
Johannes Alberti, John Zhuge, Jonathan Eagles, Jonathan Hung, Jongyoul Lee,
Juan Rodríguez Hortalá, Junping Du, Kai Sasaki, Kannapiran Srinivasan,
Karthik Kambatla, Karthik Palaniappan, Karthik Palanisamy, Keqiu Hu, Kihwal
Lee, Konstantin Shvachko, Konstantinos Karanasos, Kuhu Shukla, Lei (Eddy)
Xu, LiXin Ge, Lokesh Jain, Lukas Majercak, Manikandan R, Manoj
Govindassamy, Masahiro Tanaka, Mikhail Erofeev, Miklos Szegedi, Ming Ma,
Mukul Kumar Singh, Nanda kumar, Nandor Kollar, Nishant Bangarwa, Oleg
Danilov, Panagiotis Garefalakis, PandaMonkey, Peter Bacsko, Ping Liu,
Prabhu Joseph, Rahul Pathak, Rajesh Balamohan, Ray Chiang, Remi Catherino,
Robert Kanter, Rohith Sharma K S, Rui Li, Rushabh S Shah, SammiChen,
Sampada Dehankar, Santhosh G Nayak, Sean Mackrory, Sean Po, Sen Zhao, Shane
Kumpf, Sharad Sonker, Shashikant Banerjee, Shawna Martell, Sivaguru
Sankaridurg, Soumabrata Chakraborty, Stephen O'Donnell, Steve Loughran,
Steven Rand, Subru Krishnan, Suma Shivaprasad, Sunil G, Surendra Singh
Lilhore, Szilard Nemeth, Takanobu Asanuma, Tanuj Nayak, Tao Yang, Tarun
Parimi, Thejas M Nair, Thomas Marquard, Todd Lipcon, Tsz Wo Nicholas Sze,
Varada Hemeswari, Varun Saxena, Varun Vasudev, Vasudevan Skm, Vinayakumar
B, Vipin Rathor, Virajith Jalaparti, Vishwajeet Dusane, Wangda Tan, Wei
Yan, Weiwei Wu, Weiwei Yang, Wilfred Spiegelenburg, Xiao Chen, Xiao Liang,
Xiaoyu Yao, Xuan Gong, Yang Wang, Yeliang Cang, Yesha Vora, Yiqun Lin,
Yonger, Yongjun Zhang, Young Chen, Yu-Tang Lin, Yufei Gu, Zhankun Tang,
Zian Chen, Zsolt Venczel, chencan, fang zhenyi, hu xiaodong, kartheek
muthyala, liaoyuxiangqin, ligongyi, liuhongtong, lovekesh bansal, lufei,
lujie, maobaolong, shanyu zhao, tartarus, usharani, wangzhiyuan, wujinhu,
Íñigo Goiri.

Best,
Wangda Tan and Vinod Kumar Vavilapalli