[GitHub] [spark] zsxwing commented on a change in pull request #24328: [SPARK-27394][WEBUI] Flush LiveEntity if necessary when receiving SparkListenerExecutorMetricsUpdate (backport 2.4)

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zsxwing commented on a change in pull request #24328: [SPARK-27394][WEBUI] Flush LiveEntity if necessary when receiving SparkListenerExecutorMetricsUpdate (backport 2.4)
URL: https://github.com/apache/spark/pull/24328#discussion_r273626820
 
 

 ##########
 File path: core/src/test/scala/org/apache/spark/ui/UISeleniumSuite.scala
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 @@ -724,6 +728,31 @@ class UISeleniumSuite extends SparkFunSuite with WebBrowser with Matchers with B
     }
   }
 
+  test("Staleness of Spark UI should not last minutes or hours") {
+    withSpark(newSparkContext(
+      master = "local[2]",
+      // Set a small heart beat interval to make the test fast
+      additionalConfs = Map(
+        "spark.executor.heartbeatInterval" -> "1s",
 
 Review comment:
   set this to 1 second due to https://issues.apache.org/jira/browse/SPARK-27419

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