AHeise commented on a change in pull request #15054:
URL: https://github.com/apache/flink/pull/15054#discussion_r605119584



##########
File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/webmonitor/WebMonitorEndpoint.java
##########
@@ -216,6 +227,49 @@ public WebMonitorEndpoint(
 
         this.leaderElectionService = 
Preconditions.checkNotNull(leaderElectionService);
         this.fatalErrorHandler = Preconditions.checkNotNull(fatalErrorHandler);
+
+        this.threadInfoOperatorTracker = initializeThreadInfoTracker(executor);
+    }
+
+    private ThreadInfoOperatorTracker<OperatorThreadInfoStats> 
initializeThreadInfoTracker(
+            ScheduledExecutorService executor) {
+        final Duration akkaTimeout;
+        try {
+            akkaTimeout = AkkaUtils.getTimeout(clusterConfiguration);
+        } catch (NumberFormatException e) {
+            throw new 
IllegalConfigurationException(AkkaUtils.formatDurationParsingErrorMessage());
+        }
+
+        final int flameGraphCleanUpInterval =
+                
clusterConfiguration.getInteger(WebOptions.FLAMEGRAPH_CLEANUP_INTERVAL);
+        final ThreadInfoRequestCoordinator threadInfoRequestCoordinator =
+                new ThreadInfoRequestCoordinator(executor, 
akkaTimeout.toMillis());
+        final ThreadInfoOperatorTracker<OperatorThreadInfoStats> 
threadInfoOperatorTracker =
+                ThreadInfoOperatorTracker.newBuilder(
+                                resourceManagerRetriever, Function.identity(), 
executor)
+                        .setCoordinator(threadInfoRequestCoordinator)
+                        .setCleanUpInterval(flameGraphCleanUpInterval)
+                        .setNumSamples(
+                                
clusterConfiguration.getInteger(WebOptions.FLAMEGRAPH_NUM_SAMPLES))
+                        .setStatsRefreshInterval(
+                                clusterConfiguration.getInteger(
+                                        
WebOptions.FLAMEGRAPH_REFRESH_INTERVAL))
+                        .setDelayBetweenSamples(
+                                Time.milliseconds(
+                                        clusterConfiguration.getInteger(
+                                                WebOptions.FLAMEGRAPH_DELAY)))
+                        .setMaxThreadInfoDepth(
+                                clusterConfiguration.getInteger(
+                                        
WebOptions.FLAMEGRAPH_STACK_TRACE_DEPTH))
+                        .build();
+
+        executor.scheduleWithFixedDelay(

Review comment:
       Done.




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