本地运行spark出现问题：
22/04/26 20:11:42 ERROR SparkContext: Error initializing SparkContext. java.lang.IllegalArgumentException: System memory 259522560 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:221)
该问题出现原因是因为 JVM申请的memory不够导致无法启动SparkContext。
解决方案：加上 .set(“spark.testing.memory”,“2147480000”)
val conf = new SparkConf().setMaster("local[*]").setAppName("test").set("spark.testing.memory","2147480000")
val sc = new SparkContext(conf)
