At present, Dubbo provides RPC capabilities and a large number of service governance capabilities. This has led to the fact that Dubbo cannot be used well if some of Dubbo's own components only need to use RPC capabilities or some users who need extreme lightweight.

Goal: To provide a Dubbo RPC kernel, users can directly program for service calls and focus on RPC.

https://issues.apache.org/jira/browse/DUBBO-118