Spark 異常彙總（持續更新）

 

Only one SparkContext may be running in this JVM (see SPARK-2243). To ignore this error, set spark.driver.allowMultipleContexts = true. The currently running SparkContext was created at: org.apache.spark.SparkContext.<init>(SparkContext.scala:82) com.demo.sadsa.SparkDemo(sadsa.scala:26) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 

緣由：

嘗試在已啓動SparkContext的相同JVM中實例化另外一個SparkContext時，SparkContext構造函數將引起異常。

解決方法：spark.driver.allowMultipleContexts = true關閉異常。