This is a maintenance release that fixes the following issues:

• HADOOP-10442 - Group look-up can cause segmentation fault when a certain JNI-based mapping module is used.
• HADOOP-10456 - Bug in Configuration.java exposed by Spark (ConcurrentModificationException)
• HDFS-5064 - Standby checkpoints should not block concurrent readers
• HDFS-6039 - Uploading a File under a Dir with default ACLs throws "Duplicated ACLFeature"
• HDFS-6094 - The same block can be counted twice towards safe mode threshold
• HDFS-6231 - DFSClient hangs infinitely if using hedged reads and all eligible DataNodes die
• HIVE-6495 - TableDesc.getDeserializer() should use correct classloader when calling Class.forName()
• HIVE-6575 - select * fails on parquet table with map data type
• HIVE-6648 - Fixed permission inheritance for multi-partitioned tables
• HIVE-6740 - Fixed addition of Avro JARs to classpath
• HUE-2061 - Task logs are not retrieved if containers not on the same host
• OOZIE-1794 - java-opts and java-opt in the Java action don't always work properly in YARN
• SOLR-5608 - Frequently reproducible failures in CollectionsAPIDistributedZkTest#testDistribSearch
• YARN-1924 - STATE_STORE_OP_FAILED happens when ZKRMStateStore tries to update app(attempt) before storing it

Enabling SSL in CDH 5: Enabling HTTPS communication in CDH 5 requires extra configuration properties to be added to YARN (yarn-site.xml and mapred-site.xml) and HDFS (hdfs-site.xml), in addition to the existing configuration settings described here.