collect() returns the contents of the RDD back to the Driver in a local
variable. Where is the local variable?
Try
val result = rdd.map(x => x + 1).collect()
regards,
Apostolos
On 21/2/20 21:28, Nikhil Goyal wrote:
Hi all,
I am trying to use almond scala kernel to run spark session on
Jupyter. I am using scala version 2.12.8. I am creating spark session
with master set to Yarn.
This is the code:
val rdd = spark.sparkContext.parallelize(Seq(1, 2, 4))
rdd.map(x => x + 1).collect()
Exception:
java.lang.ClassCastException: cannot assign instance of
java.lang.invoke.SerializedLambda to field
org.apache.spark.rdd.MapPartitionsRDD.f of type scala.Function3 in
instance of org.apache.spark.rdd.MapPartitionsRDD
I was wondering if anyone has seen this before.
Thanks
Nikhil
--
Apostolos N. Papadopoulos, Associate Professor
Department of Informatics
Aristotle University of Thessaloniki
Thessaloniki, GREECE
tel: ++0030312310991918
email: papad...@csd.auth.gr
twitter: @papadopoulos_ap
web: http://datalab.csd.auth.gr/~apostol
