HDFS-7398. Reset cached thread-local FSEditLogOp's on every FSEditLog#logEdit. Contributed by Gera Shegalov.
HADOOP-11201. Hadoop Archives should support globs resolving to files. Contributed by Gera Shegalov.
HDFS-7225. Remove stale block invalidation work when DN re-registers with different UUID. (Zhe Zhang and Andrew Wang)
HDFS-7373. Allow decommissioning of dead DataNodes. Contributed by Zhe Zhang.
HDFS-7407. Minor typo in privileged pid/out/log names (aw)
YARN-2878. Fix DockerContainerExecutor.apt.vm formatting. Contributed by Abin Shahab
HADOOP-11208. Replace "daemon" with better name in script subcommands (aw)
HDFS-7409. Allow dead nodes to finish decommissioning if all files are fully replicated.
YARN-2865. Fixed RM to always create a new RMContext when transtions from StandBy to Active. Contributed by Rohith Sharmaks
YARN-2802. ClusterMetrics to include AM launch and register delays. (Zhihai Xu via kasha)
YARN-2315. FairScheduler: Set current capacity in addition to capacity. (Zhihai Xu via kasha)
HDFS-7413. Some unit tests should use NameNodeProtocols instead of FSNameSystem. Contributed by Haohui Mai.
HADOOP-11323. WritableComparator#compare keeps reference to byte array. Contributed by Wilfred Spiegelenburg.
MAPREDUCE-6169. MergeQueue should release reference to the current item from key and value at the end of the iteration to save memory. (Zhihai Xu via kasha)
HDFS-7415. Move FSNameSystem.resolvePath() to FSDirectory. Contributed by Haohui Mai.
YARN-2375. Allow enabling/disabling timeline server per framework. (Mit Desai via jeagles)
YARN-2604. Scheduler should consider max-allocation-* in conjunction with the largest node. (Robert Kanter via kasha)
HDFS-7420. Delegate permission checks to FSDirectory. Contributed by Haohui Mai.
YARN-2679. Add metric for container launch duration. (Zhihai Xu via kasha)
Update release date for 2.5.2