Community friend, I found that the grpc plugin has the problem of incompatibility with lower versions.
1. MethodDescriptor.Marshaller get defaultInstance field not compatible with low versions. 2.MethodDescriptor get serviceName field not compatible with low versions. 3.The output json field is not standardized 4.The documentation does not specify the need to implement the GrpcServerBuilder interfac Please refer to the github issue for details ?? https://github.com/apache/incubator-shenyu/issues/3374 thinks.
