For your second question,
bq. Class is not registered: scala.Tuple3[]
The above IllegalArgumentException has stated the class Scala was expecting
registration.
Meaning the type of components in the tuple is insignificant.
BTW what Spark release are you using ?
Cheers
On Thu, Dec 31, 2015 at
The ScalaTest code that is enclosed at the end of this email message
demonstrates what appears to be a bug in the KryoSerializer. This code was
executed from IntelliJ IDEA (community edition) under Mac OS X 10.11.2
The KryoSerializer is enabled by updating the original SparkContext (that is
