HADOOP-11057. checknative command to probe for winutils.exe on windows. Contributed by Xiaoyu Yao.
HDFS-6776. Using distcp to copy data between insecure and secure cluster via webdhfs doesn't work. (yzhangal via tucu)
HADOOP-11077. NPE if hosts not specified in ProxyUsers. (gchanan via tucu)
HADOOP-9989. Bug introduced in HADOOP-9374, which parses the -tokenCacheFile as binary file but set it to the configuration as JSON file. (zxu via tucu)
YARN-1458. FairScheduler: Zero weight can lead to livelock. (Zhihai Xu via kasha)
YARN-2448. Changed ApplicationMasterProtocol to expose RM-recognized resource types to the AMs. Contributed by Varun Vasudev.
YARN-2459. RM crashes if App gets rejected for any reason and HA is enabled. Contributed by Jian He
YARN-2158. Fixed TestRMWebServicesAppsModification#testSingleAppKill test failure. Contributed by Varun Vasudev
HADOOP-10758. KMS: add ACLs on per key basis. (tucu)
Fix CHANGES.txt. Credit Mayank Bansal for his contributions on YARN-2459
MAPREDUCE-6075. HistoryServerFileSystemStateStore can create zero-length files. Contributed by Jason Lowe
HADOOP-11074. Move s3-related FS connector code to hadoop-aws. (David S. Wang via Colin Patrick McCabe)
YARN-415. Capture aggregate memory allocation at the app-level for chargeback. Contributed by Eric Payne & Andrey Klochkov
YARN-2440. Enabled Nodemanagers to limit the aggregate cpu usage across all containers to a preconfigured limit. Contributed by Varun Vasudev.
MAPREDUCE-6070. yarn.app.am.resource.mb/cpu-vcores affects uber mode but is not documented. Contributed by Tsuyoshi OZAWA
HDFS-6966. Add additional unit tests for encryption zones. Contributed by Stephen Chu.
HDFS-6621. Hadoop Balancer prematurely exits iterations. Contributed by Rafal Wodjdyla and Benjamin Bowman.
HDFS-7045. Fix NameNode deadlock when opening file under /.reserved path. Contributed by Yi Liu.
HADOOP-9540: move CHANGES.txt entry to 2.6
HADOOP-10373: move CHANGES.txt entry to branch-2.6