HDFS-6480. Move waitForReady() from FSDirectory to FSNamesystem. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603705 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6563. NameNode cannot save fsimage in certain circumstances when snapshots are in use. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603712 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5844. Add a configurable delay to reducer-preemption. (Maysam Yabandeh via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603957 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6492. Support create-time xattrs and atomically setting multiple xattrs. (wang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603971 13f79535-47bb-0310-9956-ffa450edef68
Move HDFS-6375 down to 2.5 section in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603974 13f79535-47bb-0310-9956-ffa450edef68
HDFS-3848. A Bug in recoverLeaseInternal method of FSNameSystem class. Contributed by Hooman Peiro Sajjad and Chen He.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1604011 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6549. Add support for accessing the NFS gateway from the AIX NFS client. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1604022 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10696. Add optional attributes to KeyProvider Options and Metadata. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1604041 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6312. WebHdfs HA failover is broken on secure clusters. (daryn via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1604045 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6403. Add metrics for log warnings reported by JVM pauses. Contributed by Yongjun Zhang.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1604074 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10279. Create multiplexer, a requirement for the fair queue. (Contributed by Chris Li)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1604090 13f79535-47bb-0310-9956-ffa450edef68