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在Intellij idea中测试写好的Spark程序,运行时报如下错误:
Using Spark’s default log4j profile: org/apache/spark/log4j-defaults.properties
20/06/14 21:45:56 INFO SparkContext: Running Spark version 2.3.4
20/06/14 21:45:57 ERROR SparkContext: Error initializing SparkContext.
org.apache.spark.SparkException: A master URL must be set in your configuration
at org.apache.spark.SparkContext.(SparkContext.scala:367)
at org.apache.spark.SparkContext . g e t O r C r e a t e ( S p a r k C o n t e x t . s c a l a : 2493 ) a t o r g . a p a c h e . s p a r k . s q l . S p a r k S e s s i o n .getOrCreate(SparkContext.scala:2493) at org.apache.spark.sql.SparkSession .getOrCreate(SparkContext.scala:2493)atorg.apache.spark.sql.SparkSessionBuilderKaTeX parse error: Can't use function '$' in math mode at position 8: anonfun$̲7.apply(SparkSe…anonfun 7. a p p l y ( S p a r k S e s s i o n . s c a l a : 925 ) a t s c a l a . O p t i o n . g e t O r E l s e ( O p t i o n . s c a l a : 121 ) a t o r g . a p a c h e . s p a r k . s q l . S p a r k S e s s i o n 7.apply(SparkSession.scala:925) at scala.Option.getOrElse(Option.scala:121) at org.apache.spark.sql.SparkSession 7.apply(SparkSession.scala:925)atscala.Option.getOrElse(Option.scala:121)atorg.apache.spark.sql.SparkSessionBuilder.getOrCreate(SparkSession.scala:925)
at com.taxi.TaxiApp$.main(TaxiApp.scala:15)
at com.taxi.TaxiApp.main(TaxiApp.scala)
解决方法：
点击run
选择edit configuration
在VM options里写入-Dspark.master=local
-Dspark.master=local:表示设置我的spark程序以local模式运行.
参考文献：A master URL must be set in your configuration at org.apache.spark.SparkContext.(SparkContext.
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