gRPC is a high performance RPC framework from Google which helps to reduce the gap between components within large scale systems. It provides a program paradigm in which code written by various languages is able to work together as a single language. The framework is promising due to the microservices tide at the moment.
I have been working on a project which leverages gRPC recently. In the project, a component, the gRPC client, written with Python communicates with another one, the gRPC server every day like a daily cron job. And during each round, multiple calls will be issued by the client.
It worked well on the first round. One day later, when 2nd round got scheduled, unavailable exception was observed from the first call with the complaint.