Changes Amazon EMR adds support for configuring a managed scaling policy for an Amazon EMR cluster. This enables automatic resizing of a cluster to optimize for job execution speed and reduced cluster cost.
Changes Amazon EMR adds support for concurrent step execution and cancelling running steps. Amazon EMR has added a new Outpost ARN field in the ListCluster and DescribeCluster API responses that is populated for clusters launched in an AWS Outpost subnet.
Changes Access to the cluster ARN makes it easier for you to author resource-level permissions policies in AWS Identity and Access Management. To simplify the process of obtaining the cluster ARN, Amazon EMR has added a new field containing the cluster ARN to all API responses that include the cluster ID.
Changes Amazon EMR has introduced an account level configuration called Block Public Access that allows you to block clusters with ports open to traffic from public IP sources (i.e. 0.0.0.0/0 for IPv4 and ::/0 for IPv6) from launching. Individual ports or port ranges can be added as exceptions to allow public access.
Changes Amazon EMR adds the ability to modify instance group configurations on a running cluster through the new "configurations" field in the ModifyInstanceGroups API.