Updates to Apache Spark and in-transit encryption for Presto in Amazon EMR release 5.6.0

You can now use new versions of Apache Spark (2.1.1), Apache HBase (1.3.1), Apache Flink (1.2.1), and Apache Mahout (0.13.0) on Amazon EMR release 5.6.0. Each of these updated versions contains bug fixes and minor improvements. Also, Mahout 0.13.0 now supports Spark 2.x. Additionally, you can now enable in-transit data encryption using SSL/TLS for Presto when using an Amazon EMR security configuration. 
Quelle: aws.amazon.com