Service not found: grpc.reflection.v1alpha.ServerReflection

[mdford]

Hi, I am trying to run evans but I am getting the following error:

evans: failed to run REPL mode: failed to instantiate a new spec: failed to instantiate the spec from proto files: failed to list packages by gRPC reflection: Service not found: grpc.reflection.v1alpha.ServerReflection

But, if I use grpc-cli, it shows grpc.reflection.v1alpha.ServerReflection as available on that server and should be available. Here are both commands to the same server:

$ ./grpc_cli ls localhost:50051 
dnp3.DNP3Service
grpc.reflection.v1alpha.ServerReflection
grpc.health.v1.Health

$ ~/evans  -r --host localhost --port 50051
evans: failed to run REPL mode: failed to instantiate a new spec: failed to instantiate the spec from proto files: 
failed to list packages by gRPC reflection: Service not found: grpc.reflection.v1alpha.ServerReflection

Any thoughts on what to do or check to make it work?

Thanks!

[ktr0731]

Can you give me more context such that environment described in bug report template?
Also, what is the gRPC reflection implementation that you using?

## Environment
- OS: 
- Terminal: 
- Evans version: 
- `protoc` version:
- `protoc` plugin version (if you are using):

[mdford]

Hi, thanks for the reply.

Operating System: Ubuntu 19.10
Kernel: Linux 5.3.0-62-generic
Architecture: x86-64

Evans:  evans 0.9.0
protoc:  libprotoc 3.12.2

Server code instantiation:

    std::string server_address("0.0.0.0:50051");
    DNP3ServiceImpl service;
    grpc::EnableDefaultHealthCheckService(true);
    grpc::reflection::InitProtoReflectionServerBuilderPlugin();
    ServerBuilder builder;

    builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
    builder.RegisterService(&service);

    std::unique_ptr<Server> server(builder.BuildAndStart());
    std::cout << "Server listening on " << server_address << std::endl;

    server->Wait();

[shooshx]

I'm seeing the same error on windows, also with a C++ server
grpc_cli works perfectly, evans shows
failed to instantiate the spec from proto files: failed to list packages by gRPC reflection: Service not found: grpc.reflection.v1alpha.ServerReflection

[MsN-12]

i had same problem .
i add this code to my sever.

reflection.Register(grpcServer)

and it fixed