pnowojski commented on a change in pull request #16861:
URL: https://github.com/apache/flink/pull/16861#discussion_r695775150



##########
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:
       Ok. I see, thanks for pointing this out. Let's keep it as it is. 
   
   I think we need to follow up later on my previous suggestion, that instead 
of having `FinishedOperatorChain` that's used in different stream tasks, just 
have a single dedicated `FinishedStreamTask` that would be able to support any 
number of source/network inputs, without creating operator chain at all.




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