X-czh commented on code in PR #23447:
URL: https://github.com/apache/flink/pull/23447#discussion_r1430859019


##########
flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/legacy/metrics/MetricStore.java:
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@@ -570,6 +578,19 @@ void retainSubtasks(Set<Integer> activeSubtasks) {
             subtasks.keySet().retainAll(activeSubtasks);
         }
 
+        void removeTransientMetrics(int subtaskIndex) {
+            if (subtasks.containsKey(subtaskIndex)) {
+                // Remove in both places as task metrics are duplicated in 
task metric store and
+                // subtask metric store for metrics query on WebInterface.
+                metrics.keySet()

Review Comment:
   Addressed, thx



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