Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/20474#discussion_r166089845
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -2168,7 +2169,23 @@ private[spark] object Utils extends Logging {
// We need to filter out null values here because dumpAllThreads() may
return null array
// elements for threads that are dead / don't exist.
val threadInfos =
ManagementFactory.getThreadMXBean.dumpAllThreads(true, true).filter(_ != null)
- threadInfos.sortBy(_.getThreadId).map(threadInfoToThreadStackTrace)
+ threadInfos.sortWith {
+ case (threadTrace1, threadTrace2) =>
--- End diff --
nit: fits in previous line
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