How to register byte[][] using kryo serialization for spark

Question

I am trying to fully utilize kryo serialization for spark. Setting

.set(\"spark.kryo.registrationRequired\", \"true\")

This will let me kno

Answer 1

I know that extremely old question but for those who might look for a solution for any array of class:

case class Person(name: String)

conf.registerKryoClasses(Array(
   classOf[Array[Array[Person]]]
))

Or in case of this specific question:

conf.registerKryoClasses(Array(
   classOf[Array[Array[Byte]]]
))

Answer 2

conf.registerKryoClasses(Array( Class.forName("[[B"))) 

should work