Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/21771#discussion_r202531920 --- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala --- @@ -1849,6 +1858,9 @@ class SparkContext(config: SparkConf) extends Logging { if (addedJars.putIfAbsent(key, timestamp).isEmpty) { logInfo(s"Added JAR $path at $key with timestamp $timestamp") postEnvironmentUpdate() + } else { + logWarning(s"The jar $path has been added already. Overwriting of added jars " + --- End diff -- This could confuse what it means with `spark.files.overwrite`.
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