jiangxb1987 commented on a change in pull request #28742:
URL: https://github.com/apache/spark/pull/28742#discussion_r436484541
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File path: core/src/main/scala/org/apache/spark/deploy/master/Master.scala
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@@ -715,7 +715,9 @@ private[deploy] class Master(
val usableWorkers = workers.toArray.filter(_.state ==
WorkerState.ALIVE)
.filter(canLaunchExecutor(_, app.desc))
.sortBy(_.coresFree).reverse
- if (waitingApps.length == 1 && usableWorkers.isEmpty) {
+ val appMayHang = waitingApps.length == 1 &&
Review comment:
Why do you need to verify `waitingApps.length == 1` ?
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