Mac:cannot call GetTrip: rpc error: code = Unavailable desc = connection error: desc = “transport: E

Mac:cannot call GetTrip: rpc error: code = Unavailable desc = connection error: desc = “transport: E

错误显示如下:

cannot call GetTrip: rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing: dial tcp: lookup localhost: no such host"

经过多次查证解决如下：

conn, err := grpc.Dial("localhost:8081", grpc.WithTransportCredentials(insecure.NewCredentials()))

生成conn之后，一定要defer关闭conn

添加如下语句：defer conn.Close()

即可解决问题。