MapWithStateRDDRecord with kryo

问题

How can I register MapWithStateRDDRecord in kryo?

When I'm trying to do.

`sparkConfiguration.registerKryoClasses(Array(classOf[org.apache.spark.streaming.rdd.MapWithStateRDD))`

I get an error

class MapWithStateRDDRecord in package rdd cannot be accessed in package org.apache.spark.streaming.rdd
[error]       classOf[org.apache.spark.streaming.rdd.MapWithStateRDDRecord]

I'd like to make sure that all serialization is done via kryo thus I set SparkConf().set("spark.kryo.registrationRequired", "true"). With this setting enabled I get exceptions during runtime. java.lang.IllegalArgumentException (Class is not registered: org.apache.spark.streaming.rdd.MapWithStateRDDRecord)

来源：https://stackoverflow.com/questions/42555183/mapwithstaterddrecord-with-kryo