dongjoon-hyun commented on a change in pull request #31882:
URL: https://github.com/apache/spark/pull/31882#discussion_r597366145
##########
File path:
core/src/main/scala/org/apache/spark/deploy/history/ApplicationCache.scala
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@@ -156,18 +156,19 @@ private[history] class ApplicationCache(
*/
@throws[NoSuchElementException]
private def loadApplicationEntry(appId: String, attemptId: Option[String]):
CacheEntry = {
- logDebug(s"Loading application Entry $appId/$attemptId")
+ logDebug(s"Loading application Entry $appId" + attemptId.map { id =>
s"/$id" }.getOrElse(""))
Review comment:
If you want to change `Some(XX)`, shall we try to use `mkString` simply?
```scala
scala> Seq(Some("attempt1"), None).foreach { attemptId =>
println(s"appId/$attemptId") }
appId/Some(attempt1)
appId/None
scala> Seq(Some("attempt1"), None).foreach { attemptId =>
println(s"appId/${attemptId.mkString}") }
appId/attempt1
appId/
```
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