HDFS-7394. Log at INFO level, not WARN level, when InvalidToken is seen in ShortCircuitCache (Keith Pak via Colin P. McCabe)
HDFS-7399. Lack of synchronization in DFSOutputStream#Packet#getLastByteOffsetBlock() (Contributed by Vinayakumar B)
HDFS-7279. Use netty to implement DatanodeWebHdfsMethods. Contributed by Haohui Mai.
HADOOP-11157. ZKDelegationTokenSecretManager never shuts down listenerThreadPool. Contributed by Arun Suresh.
YARN-2414. RM web UI: app page will crash if app is failed before any attempt has been created. Contributed by Wangda Tan
HDFS-7146. NFS ID/Group lookup requires SSSD enumeration on the server. Contributed by Yongjun Zhang
HADOOP-11311. Restrict uppercase key names from being created with JCEKS.
MAPREDUCE-6162. mapred hsadmin fails on a secure cluster. Contributed by Jason Lowe
YARN-2690. [YARN-2574] Make ReservationSystem and its dependent classes independent of Scheduler type. (Anubhav Dhoot via kasha)
HDFS-6982. nntop: top­-like tool for name node users. (Maysam Yabandeh via wang)
HDFS-7404. Remove o.a.h.hdfs.server.datanode.web.resources. Contributed by Li Lu.
MAPREDUCE-6049. AM JVM does not exit if MRClientService graceful shutdown
fails. Contributed by Rohith.
HADOOP-11309. System class pattern package.Foo should match package.Foo$Bar, too. Contributed by Gera Shegalov
HADOOP-11312. Fix unit tests to not use uppercase key names.
HDFS-7406. SimpleHttpProxyHandler puts incorrect "Connection: Close" header. Contributed by Haohui Mai.
YARN-2870. Updated the command to run the timeline server it the document. Contributed by Masatake Iwasaki.
YARN-2157. Added YARN metrics in the documentaion. Contributed by Akira AJISAKA
HDFS-7398. Reset cached thread-local FSEditLogOp's on every FSEditLog#logEdit. Contributed by Gera Shegalov.
HADOOP-11201. Hadoop Archives should support globs resolving to files. Contributed by Gera Shegalov.
HDFS-7225. Remove stale block invalidation work when DN re-registers with different UUID. (Zhe Zhang and Andrew Wang)