Exception in thread "main" java.lang.IllegalArgumentException: System memory 251396096 must be at least 471859200. Please increase heap size using the --driver-memory option or spark.driver.memory in Spark configuration.
at org.apache.spark.memory.UnifiedMemoryManager$.getMaxMemory(UnifiedMemoryManager.scala:216)
at org.apache.spark.memory.UnifiedMemoryManager$.apply(UnifiedMemoryManager.scala:198)
at org.apache.spark.SparkEnv$.create(SparkEnv.scala:330)
at org.apache.spark.SparkEnv$.createDriverEnv(SparkEnv.scala:174)
at org.apache.spark.SparkContext.createSparkEnv(SparkContext.scala:257)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:432)
at RunWordCount$.main(RunWordCount.scala:17)
at RunWordCount.main(RunWordCount.scala)