Spark 1.6.0 is available and deployable via Ambari if you are running HDP 2.4.0. Otherwise, you have the option to deploy Spark 1.6 (Technical Preview) manually on HDP 2.3.x as discussed here.
Spark 1.6.0 is available and deployable via Ambari if you are running HDP 2.4.0. Otherwise, you have the option to deploy Spark 1.6 (Technical Preview) manually on HDP 2.3.x as discussed here.