HDFS-4655. DNA_FINALIZE is logged as being an unknown command by the DN when received from the standby NN. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1463355 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4656. DN heartbeat loop can be briefly tight. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1463357 13f79535-47bb-0310-9956-ffa450edef68
Reverted MAPREDUCE-4974 because of test failures.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1463359 13f79535-47bb-0310-9956-ffa450edef68
YARN-516. Fix failure in TestContainerLocalizer caused by HADOOP-9357. Contributed by Andrew Wang.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1463362 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4312-trunk-gd