YARN-2656. Made RM web services authentication filter support proxy user. Contributed by Varun Vasudev and Zhijie Shen.
HDFS-7190. Bad use of Preconditions in startFileInternal(). Contributed by Dawson Choong.
MAPREDUCE-5873. Shuffle bandwidth computation includes time spent waiting for maps. Contributed by Siqi Li
HDFS-7185. The active NameNode will not accept an fsimage sent from the standby during rolling upgrade. Contributed by Jing Zhao.
MAPREDUCE-5970. Provide a boolean switch to enable MR-AM profiling. Contributed by Gera Shegalov
YARN-2312. Deprecated old ContainerId#getId API and updated MapReduce to use ContainerId#getContainerId instead. Contributed by Tsuyoshi OZAWA
HADOOP-11181. GraphiteSink emits wrong timestamps (Sascha Coenen via raviprak)
YARN-2496. Enhanced Capacity Scheduler to have basic support for allocating resources based on node-labels. Contributed by Wangda Tan.
YARN-2500. Ehnaced ResourceManager to support schedulers allocating resources based on node-labels. Contributed by Wangda Tan.
YARN-2685. Fixed a bug in CommonNodeLabelsManager that caused wrong resource tracking per label when a host runs multiple node-managers. Contributed by Wangda Tan.
HDFS-7208. NN doesn't schedule replication when a DN storage fails.  Contributed by Ming Ma
HDFS-5089. When a LayoutVersion support SNAPSHOT, it must support FSIMAGE_NAME_OPTIMIZATION.
YARN-2689 TestSecureRMRegistryOperations failing on windows: secure ZK won't start
YARN-2621. Simplify the output when the user doesn't have the access for getDomain(s). Contributed by Zhijie Shen
HADOOP-11182. GraphiteSink emits wrong timestamps (Sascha Coenen via raviprak) Fix CHANGES.txt
YARN-2682. Updated WindowsSecureContainerExecutor to not use DefaultContainerExecutor#getFirstApplicationDir and use getWorkingDir() instead. Contributed by Zhihai Xu
Moved YARN-2682 from 2.6 to 2.7 in CHANGES.txt
HDFS-6995. Block should be placed in the client's 'rack-local' node if 'client-local' node is not available (vinayakumarb)
Adding missed test file
HDFS-7242. Code improvement for FSN#checkUnreadableBySuperuser. (Contributed by Yi Liu)
HDFS-7252. small refinement to the use of isInAnEZ in FSNamesystem. (Yi Liu via vinayakumarb)
YARN-2699. Fixed a bug in CommonNodeLabelsManager that caused tests to fail when using ephemeral ports on NodeIDs. Contributed by Wangda Tan.