pnowojski commented on a change in pull request #16861:
URL: https://github.com/apache/flink/pull/16861#discussion_r694864946



##########
File path: 
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/FinishedOperatorChain.java
##########
@@ -55,6 +55,11 @@ public boolean isFinishedOnRestore() {
         return true;
     }
 
+    @Override
+    public WatermarkGaugeExposingOutput<StreamRecord<OUT>> 
getMainOperatorOutput() {
+        return new FinishedOnRestoreMainOperatorOutput<>(streamOutputs);
+    }
+

Review comment:
       Maybe instead of introducing `FinishedOnRestoreMainOperatorOutput`, we 
could add `void OperatorChain#advanceToEndOfEventTime()` method?




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