HADOOP-11179. Java untar should handle the case that the file entry comes without its parent directory entry. Contributed by Craig Welch.
YARN-2598 GHS should show N/A instead of null for the inaccessible information  (Zhijie Shen via mayank)
HDFS-7202. Should be able to omit package name of SpanReceiver on "hadoop trace -add" (iwasakims via cmccabe)
HADOOP-11161. Expose close method in KeyProvider to give clients of Provider implementations a hook to release resources. Contribued by Arun Suresh.