Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/15756#discussion_r86422590
--- Diff: core/src/main/scala/org/apache/spark/util/JsonProtocol.scala ---
@@ -540,7 +544,8 @@ private[spark] object JsonProtocol {
def taskStartFromJson(json: JValue): SparkListenerTaskStart = {
val stageId = (json \ "Stage ID").extract[Int]
- val stageAttemptId = (json \ "Stage Attempt
ID").extractOpt[Int].getOrElse(0)
+ val stageAttemptId =
+ Utils.jsonOption(json \ "Stage Attempt
ID").map(_.extract[Int]).getOrElse(0)
--- End diff --
if so maybe we should add a scalastyle to ban it
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