Exception in thread “main” java.lang.NoSuchMethodError: scala.Predef..conforms()Lscala/Predef$$less$
阿新 • • 發佈:2018-12-12
執行Scala程式,出現如下問題:
Exception in thread “main” java.lang.NoSuchMethodError: scala.Predef..conforms()Lscala/Predef$$less$colon$less;
at org.apache.spark.util.Utils$.getSystemProperties(Utils.scala:1546)
at org.apache.spark.SparkConf.(SparkConf.scala:59)
at org.apache.spark.SparkConf.(SparkConf.scala:53)
at com.nb.sparkApps.sql.SparkSQLUDFUDAF$.main(SparkSQLUDFUDAF.scala:19)
at com.nb.sparkApps.sql.SparkSQLUDFUDAF.main(SparkSQLUDFUDAF.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
出現問題原因是由於Spark和scala版本差異
因為在pom.xml檔案中定義了Spark和scala版本