HDFS-7218. FSNamesystem ACL operations should write to audit log on failure. (clamb via yliu)
HADOOP-11271. Use Time.monotonicNow() in Shell.java instead of Time.now() (Contributed by Vinayakumar B)
HADOOP-11265. Credential and Key Shell Commands not available on Windows. Contributed by Larry McCay.
HDFS-7335. Redundant checkOperation() in FSN.analyzeFileState(). Contributed by Milan Desai.
HDFS-7333. Improve logging in Storage.tryLock(). Contributed by Konstantin Shvachko.
HDFS-7357. FSNamesystem.checkFileProgress should log file path. Contributed by Tsz Wo Nicholas Sze.
HDFS-7199. DFSOutputStream should not silently drop data if DataStreamer crashes with an unchecked exception (rushabhs via cmccabe)
CHANGES.txt.  Move HDFS-7199 to branch-2.6
YARN-2767. Added a test case to verify that http static user cannot kill or submit apps in the secure mode. Contributed by Varun Vasudev.
HADOOP-11266. Remove no longer supported activation properties for packaging from pom. Contributed by Masatake Iwasaki.
HDFS-7359. NameNode in secured HA cluster fails to start if dfs.namenode.secondary.http-address cannot be interpreted as a network address. Contributed by Chris Nauroth.
YARN-2805. Fixed ResourceManager to load HA configs correctly before kerberos login. Contributed by Wangda Tan.
HADOOP-11267. TestSecurityUtil fails when run with JDK8 because of empty principal names. Contributed by Stephen Chu.
YARN-2579. Fixed a deadlock issue when EmbeddedElectorService and FatalEventDispatcher try to transition RM to StandBy at the same time. Contributed by Rohith Sharmaks
HADOOP-10714. AmazonS3Client.deleteObjects() need to be limited to 1000 entries per call. Contributed by Juan Yu.
HADOOP-11272. Allow ZKSignerSecretProvider and ZKDelegationTokenSecretManager to use the same curator client. Contributed by Arun Suresh.
HDFS-7366. BlockInfo should take replication as an short in the constructor. Contributed by Li Lu.
HADOOP-11187 NameNode - KMS communication fails after a long period of inactivity. Contributed by Arun Suresh.
YARN-2813. Fixed NPE from MemoryTimelineStore.getDomains. Contributed by Zhijie Shen
HDFS-7361. TestCheckpoint fails after change of log message related to locking violation. Contributed by Konstantin Shvachko.