This is a maintenance release that fixes the following issues:

• HADOOP-11035 - distcp on mr1(branch-1) fails with NPE using a short relative source path.
• HBASE-10012 - Hide ServerName constructor
• HBASE-11349 - [Thrift] support authentication/impersonation
• HBASE-11446 - Reduce the frequency of RNG calls in SecureWALCellCodec#EncryptedKvEncoder
• HBASE-11457 - Increment HFile block encoding IVs accounting for ciper's internal use
• HBASE-11474 - [Thrift2] support authentication/impersonation
• HBASE-11565 - Stale connection could stay for a while
• HBASE-11627 - RegionSplitter's rollingSplit terminated with "/ by zero", and the _balancedSplit file was not deleted properly
• HBASE-11788 - hbase is not deleting the cell when a Put with a KeyValue, KeyValue.Type.Delete is submitted
• HBASE-11828 - callers of SeverName.valueOf should use equals and not ==
• HDFS-4257 - The ReplaceDatanodeOnFailure policies could have a forgiving option
• HDFS-6776 - Using distcp to copy data between insecure and secure cluster via webdhfs doesn't work
• HDFS-6908 - incorrect snapshot directory diff generated by snapshot deletion
• HUE-2247 - [Impala] Support pass-through LDAP authentication
• HUE-2295 - [librdbms] External oracle DB connection is broken due to a typo
• HUE-2273 - [desktop] Blacklisting apps with existing document will break home page
• HUE-2318 - [desktop] Documents shared with write group permissions are not editable
• HIVE-5087 - Rename npath UDF to matchpath
• HIVE-6820 - HiveServer(2) ignores HIVE_OPTS
• HIVE-7635 - Query having same aggregate functions but different case throws IndexOutOfBoundsException
• IMPALA-958 - Excessively long query plan serialization time in FE when querying huge tables
• IMPALA-1091 - Improve TScanRangeLocation struct and associated code
• OOZIE-1989 - NPE during a rerun with forks
• YARN-1458 - FairScheduler: Zero weight can lead to livelock