HADOOP-10125. no need to process RPC request if the client connection has been dropped. Contributed by Min Ma

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1558575 13f79535-47bb-0310-9956-ffa450edef68
Fix CHANGE.txt for the contributor's name

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1558578 13f79535-47bb-0310-9956-ffa450edef68
YARN-1351. Invalid string format in Fair Scheduler log warn message (Konstantin Weitz via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1558597 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5768. Consolidate the serialization code in DelegationTokenSecretManager. Contributed by Haohui Mai

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1558598 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5775. Consolidate the code for serialization in CacheManager. Contributed by Haohui Mai

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1558599 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5777. Update LayoutVersion for the new editlog op OP_ADD_BLOCK. Contributed by Jing Zhao.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1558675 13f79535-47bb-0310-9956-ffa450edef68