AWS Data Pipeline
Developer Guide (API Version 2012-10-29)

Launch an Amazon EMR cluster with release label emr-4.x or greater

The following example launches an Amazon EMR cluster using the newer releaseLabel field:

{ "id" : "MyEmrCluster", "type" : "EmrCluster", "keyPair" : "my-key-pair", "masterInstanceType" : "m3.xlarge", "coreInstanceType" : "m3.xlarge", "coreInstanceCount" : "10", "taskInstanceType" : "m3.xlarge", "taskInstanceCount": "10", "releaseLabel": "emr-4.1.0", "applications": ["spark", "hive", "pig"], "configuration": {"ref":"myConfiguration"} }