Illegal Access error in GraphX

[nwasiq]

I'm using Spark and Graphx on IntelliJ IDEA for the first time. I'm trying to create a graph and running queries on it but I'm getting the following error:

java.lang.IllegalAccessError: tried to access class org.apache.spark.util.collection.Sorter from class org.apache.spark.graphx.impl.EdgePartitionBuilder

Here's my code:

package org.apache.spark.examples // import required spark classes

import org.apache.spark. import org.apache.spark.SparkContext. import org.apache.spark.SparkConf import org.apache.spark.graphx._ import org.apache.spark.rdd.RDD // define main method (scala entry point) object HelloWorld { def main(args: Array[String]) {

val conf = new SparkConf().setAppName("HelloWorld")
val sc = new SparkContext(conf)
val vertexArray = Array(
  (1L, ("Alice", 28)),
  (2L, ("Bob", 27)),
  (3L, ("Charlie", 65)),
  (4L, ("David", 42)),
  (5L, ("Ed", 55)),
  (6L, ("Fran", 50))
)
val edgeArray = Array(
  Edge(2L, 1L, 7),
  Edge(2L, 4L, 2),
  Edge(3L, 2L, 4),
  Edge(3L, 6L, 3),
  Edge(4L, 1L, 1),
  Edge(5L, 2L, 2),
  Edge(5L, 3L, 8),
  Edge(5L, 6L, 3)
)
val vertexRDD: RDD[(Long, (String, Int))] = sc.parallelize(vertexArray)
val edgeRDD: RDD[Edge[Int]] = sc.parallelize(edgeArray)
val graph: Graph[(String, Int), Int] = Graph(vertexRDD, edgeRDD)

// Solution 1
graph.vertices.filter { case (id, (name, age)) => age > 30 }.collect.foreach {
  case (id, (name, age)) => println(s"$name is $age")
}

// Solution 2
graph.vertices.filter(v => v._2._2 > 30).collect.foreach(v => println(s"${v._2._1} is ${v._2._2}"))

// Solution 3
for ((id,(name,age)) <- graph.vertices.filter { case (id,(name,age)) => age > 30 }.collect) {
  println(s"$name is $age")
}

sc.stop()

} }