vanzin commented on a change in pull request #26616: [SPARK-25392][CORE][WEBUI]
Prevent error page when accessing pools page from history server
URL: https://github.com/apache/spark/pull/26616#discussion_r358394391
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File path: core/src/main/scala/org/apache/spark/ui/jobs/AllStagesPage.scala
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@@ -30,7 +30,8 @@ import org.apache.spark.ui.{UIUtils, WebUIPage}
private[ui] class AllStagesPage(parent: StagesTab) extends WebUIPage("") {
private val sc = parent.sc
private val subPath = "stages"
- private def isFairScheduler = parent.isFairScheduler
+ // Show pool information for only live UI
+ private def isFairScheduler = sc.isDefined && parent.isFairScheduler
Review comment:
It would be better to fix `StageTab.isFairScheduler` and remove this method.
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