Amazon EMR Serverless Gets IPv6 Support – No More Address Space Headaches
Amazon EMR Serverless now supports IPv6 and dual-stack connectivity, letting you run Apache Spark and Hive jobs over IPv6 in your VPC. This solves IPv4 address exhaustion issues and meets compliance requirements while keeping full backward compatibility with existing IPv4 workloads—available at no extra cost across all AWS Regions.
source: [aws/whats-new]