Github user gatorsmile commented on a diff in the pull request:

    https://github.com/apache/spark/pull/13283#discussion_r64626689
  
    --- Diff: 
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala
 ---
    @@ -132,12 +131,11 @@ case class DataSource(
                   }
               }
             } catch {
    -          case e: NoClassDefFoundError => // This one won't be caught by 
Scala NonFatal
    -            // NoClassDefFoundError's class name uses "/" rather than "." 
for packages
    -            val className = e.getMessage.replaceAll("/", ".")
    -            if (spark2RemovedClasses.contains(className)) {
    -              throw new ClassNotFoundException(s"$className was removed in 
Spark 2.0. " +
    -                "Please check if your library is compatible with Spark 
2.0", e)
    +          case e: NoClassDefFoundError =>
    +            // e.getMessage is the class name of provider2. Instead, we 
use provider here.
    +            if (spark2RemovedClasses.contains(provider)) {
    --- End diff --
    
    Will revert the changes for `NoClassDefFoundError`. Thanks!


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