从scala命令行使用KRYO注册类

Question

当我尝试从scala提示符运行命令时，我收到以下错误：

(TID 0, 192.168.20.81): java.lang.IllegalArgumentException:  

Class is not registered: scala.Tuple3[]    
Class is not registered: org.apache.spark.sql.Row[]

Note: To register this class use: kryo.register(scala.Tuple3[].class);
Note: To register this class use: kryo.register(org.apache.spark.sql.Row[].class);

当我运行“推荐”命令来注册我得到的课程时：

scala> kryo.register(scala.Tuple3[].class)
<console>:1: error: identifier expected but ']' found.
   kryo.register(scala.Tuple3[].class)