YARN-1915. Fixed a race condition that client could use the ClientToAMToken to contact with AM before AM actually receives the ClientToAMTokenMasterKey. Contributed by Jason Lowe
YARN-2314. Disable ContainerManagementProtocolProxy cache by default to prevent creating thousands of threads in a large cluster. Contributed by Jason Lowe
YARN-2183. [YARN-1492] Cleaner service for cache manager. (Chris Trezzo and Sangjin Lee via kasha)
HADOOP-6857. FsShell should report raw disk usage including replication factor. Contributed by Byron Wong.
YARN-2723. Fix rmadmin -replaceLabelsOnNode does not correctly parse
port. Contributed by Naganarasimha G R