YARN-1964. Create Docker analog of the LinuxContainerExecutor in YARN
YARN-2780. Log aggregated resource allocation in rm-appsummary.log. Contributed by Eric Payne
YARN-2236. [YARN-1492] Shared Cache uploader service on the Node Manager. (Chris Trezzo and Sanjin Lee via kasha)
HADOOP-9576. Merging to branch-2.6 for hadoop-2.6.0-rc1.
YARN-2841. Merging to branch-2.6 for hadoop-2.6.0-rc1.
YARN-2843. Merging to branch-2.6 for hadoop-2.6.0-rc1.
YARN-2794. Fixed log messages about distributing system-credentials. Contributed by Jian He.
HDFS-7387. Merging to branch-2.6 for hadoop-2.6.0-rc1.
HADOOP-11025. hadoop-daemons.sh should just call hdfs directly (Masatake Iwasaki via aw)
HADOOP-11284. Fix variable name mismatches in hadoop-functions.sh (Masatake Iwasaki via aw)
YARN-2603. ApplicationConstants missing HADOOP_MAPRED_HOME (Ray Chiang via aw)
HADOOP-11217. (Addendum to allow SSLv2Hello) Disable SSLv3 in KMS. (Robert Kanter via kasha)
HDFS-7391. Renable SSLv2Hello in HttpFS. Contributed by Robert Kanter.
Fix CHANGES.txt to make it consistent with branch-2.
HADOOP-7984. Add hadoop --loglevel option to change log level. Contributed by Aikira AJISAKA.
HADOOP-11291. Log the cause of SASL connection failures. Contributed by Stephen Chu.
MAPREDUCE-6156. Fetcher - connect() doesn't handle connection refused correctly. Contributed by Junping Du
YARN-2846. Incorrect persist exit code for running containers in reacquireContainer() that interrupted by NodeManager restart. Contributed by Junping Du
YARN-2853. Fixed a bug in ResourceManager causing apps to hang when the user kill request races with ApplicationMaster finish. Contributed by Jian He.
YARN-2853. Merging to branch-2.6 for hadoop-2.6.0-rc1.