Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/22504#discussion_r220014946
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -2328,7 +2328,16 @@ private[spark] object Utils extends Logging {
* configure a new log4j level
*/
def setLogLevel(l: org.apache.log4j.Level) {
- org.apache.log4j.Logger.getRootLogger().setLevel(l)
+ val rootLogger = org.apache.log4j.Logger.getRootLogger()
+ rootLogger.setLevel(l)
+ val appenders = rootLogger.getAllAppenders
--- End diff --
`rootLogger.getAllAppenders().asScala.foreach { ... }`
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