workcount中遇到的一个问题(关于版本)

Exception in thread "main" java.lang.NoSuchMethodError: scala.Predef$.refArrayOps([Ljava/lang/Object;)Lscala/collection/mutable/ArrayOps;
at org.apache.spark.util.Utils$.getCallSite(Utils.scala:1434)
at org.apache.spark.SparkContext.(SparkContext.scala:76)
at firstTest$.main(firstTest.scala:11)
at firstTest.main(firstTest.scala)

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