JDK 21 support for SOEs and SOIs
Starting from ArcGIS Enterprise SDK 12.1, developing the Java-Based SOEs and SOIs with JDK 21 is supported. See Install Java and Maven.
Utility Network support for telecom workflows
ArcGIS Enterprise SDK 12.1 includes enhancements that improve integration and extensibility for telecom implementations using the ArcGIS Utility Network. These updates help developers build SOEs and SOIs for telecommunications network management workflows. For a complete list of newly added interfaces and classes, refer to the What's New in 12.1 API documentation.