HDFS-7475. Make TestLazyPersistFiles#testLazyPersistBlocksAreSaved deterministic. (Contributed by Xiaoyu Yao)
MAPREDUCE-5420. Remove mapreduce.task.tmp.dir from mapred-default.xml. Contributed by James Carman. (harsh)
HDFS-7463. Simplify FSNamesystem#getBlockLocationsUpdateTimes. Contributed by Haohui Mai.
HDFS-7503. Namenode restart after large deletions can cause slow processReport (Arpit Agarwal)
HADOOP-11353. Add support for .hadooprc (aw)
YARN-2917. Fixed potential deadlock when system.exit is called in AsyncDispatcher. Contributed by Rohith Sharmaks
HDFS-7515. Fix new findbugs warnings in hadoop-hdfs. Contributed by Haohui Mai.
HADOOP-11211. mapreduce.job.classloader.system.classes semantics should be order-independent. (Yitong Zhou via gera)