Are the grpc generated stubs thread safe?

Question

I am taking a look at the tutorials of grpc https://grpc.io/docs/tutorials/basic/go.html

The grpc unary call looks something like this

conn, err := grpc.Dial(*serverAddr)
if err != nil {
    ...
}
defer conn.Close()
client := pb.NewRouteGuideClient(conn)
feature, err := client.GetFeature(context.Background(), &pb.Point{409146138, -746188906})
if err != nil {
        ...
}

I wanted to know if I call

   client.GetFeature

from multiple threads, is it thread safe?

Answer 1

Looking into this issue you can learn that:

@rubenv asks:

Can I use a client from different threads in parallel?

@iamqizhao replies:

On client, if you want to perform multiple rpc in parallel, you should spawn multiple goroutines to do that since the rpc is synchronous/blocking

the answer is yes, however, a stream can't be shared (source).

@trevorgray, these kinds of concurrency topics are apparently still not documented, per #682.