idea连接spark集群报错解析：Caused by: java.lang.ClassCastException

cannot assign instance of scala.collection.immutable.List$SerializationProxy to field org.apache.spark.sql.execution.aggregate.SortAggregateExec.aggregateExpressions of type scala.collection.Seq in instance of org.apache.spark.sql.execution.aggregate.SortAggregateExec

Exception in thread "main" org.apache.spark.SparkException: Job aborted due to stage failure: Task 8 in stage 4.0 failed 4 times, most recent failure: Lost task 8.3 in stage 4.0 (TID 332, 172.16.43.200, executor 1): java.lang.ClassCastException: cannot assign instance of scala.collection.immutable.List$SerializationProxy to field org.apache.spark.sql.execution.aggregate.SortAggregateExec.aggregateExpressions of type scala.collection.Seq in instance of org.apache.spark.sql.execution.aggregate.SortAggregateExec

　　当只指定了spark集群的地址，没有设定setJars这个参数，那么就会报以上这种错误，解决方法就是设置setjars这个参数,如下：

System.setProperty("hadoop.home.dir", "E:\\winutils")
    val conf = new SparkConf().setAppName("DetailRatio")
      .setMaster("spark://172.xx.xx.xx:7077")
   // .setMaster("local")
     .setJars(List("E:\\vense_work\\venseData\\out\\artifacts\\DetailRatio_jar\\venseData.jar"))
    //.set("spark.submit.deployMode", "client")

原文地址：https://www.cnblogs.com/zhnagqi-dream/p/11813578.html