HADOOP-11289. Fix typo in RpcUtil log message. Contributed by Charles Lamb.
Set the release date for 2.5.2
HADOOP-11296. Nfs3FileAttributes should not change the values of rdev, nlink and size in the constructor. Contributed by Brandon Li.
HADOOP-9576. Changed NetUtils#wrapException to throw EOFException instead of wrapping it as IOException. Contributed by Steve Loughran
YARN-2841. RMProxy should retry EOFException.  Contributed by Jian He
YARN-2841: Correct fix version from branch-2.6 to branch-2.7 in the
change log.
YARN-2735. diskUtilizationPercentageCutoff and diskUtilizationSpaceCutoff are initialized twice in DirectoryCollection. (Zhihai Xu via kasha)
YARN-2843. Fixed NodeLabelsManager to trim inputs for hosts and labels so as to make them work correctly. Contributed by Wangda Tan.
HDFS-7381. Decouple the management of block id and gen stamps from FSNamesystem. Contributed by Haohui Mai.
HDFS-7387. NFS may only do partial commit due to a race between COMMIT and write. Contributed by Brandon Li
YARN-570. Time strings are formated in different timezone. (Akira Ajisaka and Peng Zhang via kasha)
HDFS-7389. Named user ACL cannot stop the user from accessing the FS entity. Contributed by Vinayakumar B.
HDFS-7375. Move FSClusterStats to o.a.h.h.hdfs.server.blockmanagement. Contributed by Haohui Mai.
YARN-1964. Create Docker analog of the LinuxContainerExecutor in YARN
YARN-2780. Log aggregated resource allocation in rm-appsummary.log. Contributed by Eric Payne
YARN-2236. [YARN-1492] Shared Cache uploader service on the Node Manager. (Chris Trezzo and Sanjin Lee via kasha)
HADOOP-9576. Merging to branch-2.6 for hadoop-2.6.0-rc1.
YARN-2841. Merging to branch-2.6 for hadoop-2.6.0-rc1.
YARN-2843. Merging to branch-2.6 for hadoop-2.6.0-rc1.
YARN-2794. Fixed log messages about distributing system-credentials. Contributed by Jian He.