Bidirection stream client block

[fayfive]

I use GRPC bidirection stream to do long connection. I have discovered an problem.
When I send data to the non fully GRPC functional server，the client will be blocked. It's different to describe. Here is my code.

// here is the client
func (client *ClientAdmin) UploadPicture(pic *pb.UploadPictureReq) (err error) {
        // will be blocked here
        return client.stream.Send(&pb.ManageReq{
	        Option: pb.MANAGE_OPT_MANAGE_OPT_UPLOAD_PICTURE,
	        Param: &pb.ManageReq_Picture{
                        // pic contain []byte about 150KB, if make the pic nil, pic.src=nil,it will not be block
		        Picture: pic,
	        },
        })
	return errors.New("stream is not here")
}

GRPC server do not implement UploadPicture. but implement the other function Why I will be block here?

[arjan-bal]

HI @fayfive, the provided code isn't sufficient to understand and debug the problem. Can you please provide a minimal reproducible example?