rmcyang commented on a change in pull request #34158:
URL: https://github.com/apache/spark/pull/34158#discussion_r720589937



##########
File path: core/src/main/scala/org/apache/spark/util/Utils.scala
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@@ -2627,6 +2627,37 @@ private[spark] object Utils extends Logging {
     }
   }
 
+  // Create an instance of the class with the given name, possibly 
initializing it with our conf
+  def instantiateClass[T](className: String, conf: SparkConf, isDriver: 
Boolean): T = {

Review comment:
       > The instantiateClassFromConf could be made private
   
   @JoshRosen Can `instantiateClassFromConf` really made private? It's also 
used to initiate Serializer instance in SparkEnv:
   
https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/SparkEnv.scala#L301
    




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