gengliangwang commented on a change in pull request #25369: 
[SPARK-28638][WebUI] Task summary metrics are wrong when there are running tasks
URL: https://github.com/apache/spark/pull/25369#discussion_r311678525
 
 

 ##########
 File path: core/src/main/scala/org/apache/spark/status/AppStatusStore.scala
 ##########
 @@ -156,7 +162,8 @@ private[spark] class AppStatusStore(
     // cheaper for disk stores (avoids deserialization).
     val count = {
       Utils.tryWithResource(
-        if (store.isInstanceOf[InMemoryStore]) {
+        if (isInMemoryStore) {
 
 Review comment:
   @shahidki31 Thanks for the suggestion.
   
   I am aware that #23088 is to follow the behavior of previous versions of 
spark.  But I wonder if we can simply show the summary metrics for all the 
tasks instead of only the "SUCCESS" ones, as all the tasks are listed in the 
task table. By doing that should also make sense to users. The implementation 
will be simpler and we don't have to worry about the performance of the disk 
store.
   Also cc @vanzin @srowen 

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