YARN-578. Fixed NM to use SecureIOUtils for reading and aggregating logs. Contributed by Omkar Vinit Joshi.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1487672 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9574. Added new methods in AbstractDelegationTokenSecretManager for helping YARN ResourceManager to reuse code for RM restart. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1487692 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5263. Bring back old methods and fields in filecache.DistributedCache for binary compatibility with mapred in 1.x. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1487695 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4863. The root directory should be added to the snapshottable directory list while loading fsimage. Contributed by Jing Zhao

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1487698 13f79535-47bb-0310-9956-ffa450edef68
YARN-714. Added NMTokens to be sent to AMs as part of heart-beat response. Contributed by Omkar Vinit Joshi.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1487704 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-238-trunk-gd