YARN-2917. Fixed potential deadlock when system.exit is called in AsyncDispatcher. Contributed by Rohith Sharmaks
HDFS-7515. Fix new findbugs warnings in hadoop-hdfs. Contributed by Haohui Mai.
HADOOP-11211. mapreduce.job.classloader.system.classes semantics should be order-independent. (Yitong Zhou via gera)
HDFS-7449. Add metrics to NFS gateway. Contributed by Brandon Li
HADOOP-11389. Clean up byte to string encoding issues in hadoop-common. Contributed by Haohui Mai.
HDFS-7497. Inconsistent report of decommissioning DataNodes between dfsadmin and NameNode webui. Contributed by Yongjun Zhang.
MAPREDUCE-6046. Change the class name for logs in RMCommunicator.
Contributed by Sahil Takiar.
YARN-2243. Order of arguments for Preconditions.checkNotNull() is wrong in
SchedulerApplicationAttempt ctor. Contributed by Devaraj K.
 YARN-2912 Jersey Tests failing with port in use. (varun saxena via stevel)
HDFS-7517. Remove redundant non-null checks in FSNamesystem#getBlockLocations. Contributed by Haohui Mai.
HDFS-7514. TestTextCommand fails on Windows. (Arpit Agarwal)
HDFS-7059. Avoid resolving path multiple times. Contributed by Jing Zhao.
HADOOP-11238. Update the NameNode's Group Cache in the background when possible (Chris Li via Colin P. McCabe)
HDFS-7426. Change nntop JMX format to be a JSON blob.
YARN-2950. Change message to mandate, not suggest JS requirement on UI. Contributed by Dustin Cote.
HADOOP-11394. hadoop-aws documentation missing. Contributed by Chris Nauroth.
HADOOP-11396. Provide navigation in the site documentation linking to the Hadoop Compatible File Systems. Contributed by Chris Nauroth.
MAPREDUCE-4879. TeraOutputFormat may overwrite an existing output directory. (gera)
MAPREDUCE-6194. Bubble up final exception in failures during creation of output collectors. Contributed by Varun Saxena.
YARN-2356. yarn status command for non-existent application/application
attempt/container is too verbose. Contributed by Sunil G.