It gives me great pleasure to announce that the Apache Hadoop community has voted to release Apache Hadoop 3.1.1.
Hadoop 3.1.1 is the first stable maintenance release for the year 2018 in the Hadoop-3.1 line and brings a number of enhancements.
3.1.1 is the first stable release of 3.1 line which is production-ready.
The Hadoop community fixed 435 JIRAs  in total as part of the 3.1.1 release. Of these fixes:
60 in Hadoop Common
139 in HDFS
223 in YARN
13 in MapReduce
Apache Hadoop 3.1.1 contains a number of significant features and enhancements. A few of them are noted below.
ENTRY_POINT support for Docker containers.
Restart policy support for YARN native services.
Capacity Scheduler: Intra-queue preemption for fairness ordering policy.
Stabilization works for schedulers, YARN service, docker support, etc.
Please see the Hadoop3.1.1 CHANGES for the detailed list of issues resolved. The release news is posted on the Apache Hadoop website too, you can go to thedownloads section.
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 and reporting issues.
Abhishek Modi, Ajay Kumar, Akhil PB, Akira Ajisaka, Allen Wittenauer, Anbang Hu, Andrew Wang, Arpit Agarwal, Atul Sikaria, BELUGA BEHR, Bharat Viswanadham, Bibin A Chundatt, Billie Rinaldi, Bilwa S T, Botong Huang, Brahma Reddy Battula, Brook Zhou, CR Hota, Chandni Singh, Chao Sun, Charan Hebri, Chen Liang, Chetna Chaudhari, Chun Chen, Daniel Templeton, Davide Vergari, Dennis Huo, Dibyendu Karmakar, Ekanth Sethuramalingam, Eric Badger, Eric Yang, Erik Krogen, Esfandiar Manii, Ewan Higgs, Gabor Bota, Gang Li, Gang Xie, Genmao Yu, Gergely Novák, Gergo Repas, Giovanni Matteo Fumarola, Gour Saha, Greg Senia, Haibo Yan, Hanisha Koneru, Hsin-Liang Huang, Hu Ziqian, Istvan Fajth, Jack Bearden, Jason Lowe, Jeff Zhang, Jian He, Jianchao Jia, Jiandan Yang , Jim Brennan, Jinglun, John Zhuge, Joseph Fourny, K G Bakthavachalam, Karthik Palanisamy, Kihwal Lee, Kitti Nanasi, Konstantin Shvachko, Lei (Eddy) Xu, LiXin Ge, Lokesh Jain, Lukas Majercak, Miklos Szegedi, Mukul Kumar Singh, Namit Maheshwari, Nanda kumar, Nilotpal Nandi, Pavel Avgustinov, Prabhu Joseph, Prasanth Jayachandran, Robert Kanter, Rohith Sharma K S, Rushabh S Shah, Sailesh Patel, Sammi Chen, Sean Mackrory, Sergey Shelukhin, Shane Kumpf, Shashikant Banerjee, Siyao Meng, Sreenath Somarajapuram, Steve Loughran, Suma Shivaprasad, Sumana Sathish, Sunil Govindan, Surendra Singh Lilhore, Szilard Nemeth, Takanobu Asanuma, Tao Jie, Tao Yang, Ted Yu, Thomas Graves, Thomas Marquardt, Todd Lipcon, Vinod Kumar Vavilapalli, Wangda Tan, Wei Yan, Wei-Chiu Chuang, Weiwei Yang, Wilfred Spiegelenburg, Xiao Chen, Xiao Liang, Xintong Song, Xuan Gong, Yang Wang, Yesha Vora, Yiqun Lin, Yiran Wu, Yongjun Zhang, Yuanbo Liu, Zian Chen, Zoltan Haindrich, Zsolt Venczel, Zuoming Zhang, fang zhenyi, john lilley, jwhitter, kyungwan nam, liaoyuxiangqin, liuhongtong, lujie, skrho, yanghuafeng, yimeng, Íñigo Goiri.
 JIRA query: project in (YARN, HADOOP, MAPREDUCE, HDFS) AND resolution = Fixed AND fixVersion = 3.1.1 ORDER BY key ASC, updated ASC, created DESC, priority DESC