Amazon Elasticsearch Service now supports Elasticsearch version 2.3. Amazon Elasticsearch Service makes it easy to run Elasticsearch, which is a popular tool for real-time analytics use cases such as log analytics and application monitoring. Elasticsearch 2.3 offers many new features, including support for pipeline aggregations, improved geo-point fields, and support for data compression. Elasticsearch version 2.3 also offers many benefits over version 1.5, including improved performance, memory management and resiliency, and security enhancements. Starting today, customers can choose between Elasticsearch version 1.5 or 2.3 when creating an Amazon Elasticsearch Service domain. 

Source: Amazon Web Services News