davidradl commented on code in PR #27638:
URL: https://github.com/apache/flink/pull/27638#discussion_r2833011910


##########
flink-runtime/src/main/java/org/apache/flink/streaming/api/operators/SourceOperator.java:
##########
@@ -781,6 +782,13 @@ public void updateCurrentEffectiveWatermark(long 
watermark) {
     public void updateCurrentSplitWatermark(String splitId, long watermark) {
         WatermarkSampler splitWatermarkSampler = 
checkNotNull(sampledSplitWatermarks.get(splitId));
         splitWatermarkSampler.addLatest(watermark);
+        if (!currentlyIdleSplits.contains(splitId)) {
+            maybePauseSplit(splitId);
+        }
+    }
+
+    private void maybePauseSplit(String splitId) {

Review Comment:
   the method name is strange - I was expecting  it to start with e a verb like 
the other methods. Maybe `updateCurrentSplitPausedWatermark 



##########
flink-runtime/src/main/java/org/apache/flink/streaming/api/operators/SourceOperator.java:
##########
@@ -781,6 +782,13 @@ public void updateCurrentEffectiveWatermark(long 
watermark) {
     public void updateCurrentSplitWatermark(String splitId, long watermark) {
         WatermarkSampler splitWatermarkSampler = 
checkNotNull(sampledSplitWatermarks.get(splitId));
         splitWatermarkSampler.addLatest(watermark);
+        if (!currentlyIdleSplits.contains(splitId)) {
+            maybePauseSplit(splitId);
+        }
+    }
+
+    private void maybePauseSplit(String splitId) {

Review Comment:
   the method name is strange - I was expecting  it to start with a verb like 
the other methods. Maybe `updateCurrentSplitPausedWatermark 



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