Github user heary-cao commented on a diff in the pull request:
https://github.com/apache/spark/pull/18555#discussion_r126273760
--- Diff:
core/src/main/scala/org/apache/spark/internal/config/package.scala ---
@@ -35,10 +35,22 @@ package object config {
ConfigBuilder(SparkLauncher.DRIVER_EXTRA_LIBRARY_PATH).stringConf.createOptional
private[spark] val DRIVER_USER_CLASS_PATH_FIRST =
-
ConfigBuilder("spark.driver.userClassPathFirst").booleanConf.createWithDefault(false)
+ ConfigBuilder("spark.driver.userClassPathFirst")
+ .doc("Whether to give user-added jars precedence over Spark's own
jars " +
+ "when loading classes in the driver. This feature can be used to
mitigate " +
+ "conflicts between Spark's dependencies and user dependencies. " +
+ "It is currently an experimental feature. This is used in cluster
mode only. ")
+ .booleanConf
+ .checkValues(Set(false, true))
--- End diff --
thanks.
please review it again.
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