IntelliJ Out-of-memory Troubleshooting

IntelliJ Out-of-memory Troubleshooting

 
 Check Memory usage:
 
  println(sys.runtime.totalMemory())
  println(sys.runtime.maxMemory())
  println(sys.runtime.freeMemory())
  
  Often, Scala or Spark program will throw Spark driver and executor will be entirely running inside the JVM that is running your code shown here that creates the SparkContext.
  By that time, it's too late to obtain more Java heap than was allocated when the JVM started. You need to add that -Xmx1G arg to the 
  command IntelliJ uses to launch the JVM that runs your code.
  VM Options: -Xmx4G