HDFS-6755. There is an unnecessary sleep in the code path where DFSOutputStream#close gives up its attempt to contact the namenode (mitdesai21 via cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1613523 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6750. The DataNode should use its shared memory segment to mark short-circuit replicas that have been unlinked as stale (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1613539 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10896. Update compatibility doc to capture visibility of un-annotated classes/ methods. (kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1613544 13f79535-47bb-0310-9956-ffa450edef68
YARN-1796. container-executor shouldn't require o-r permissions. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1613549 13f79535-47bb-0310-9956-ffa450edef68
YARN-1726. ResourceSchedulerWrapper broken due to AbstractYarnScheduler. (Wei Yan via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1613550 13f79535-47bb-0310-9956-ffa450edef68