zhijiangW commented on a change in pull request #9471: [FLINK-13754][task] 
Decouple OperatorChain with StreamStatusMaintainer
URL: https://github.com/apache/flink/pull/9471#discussion_r316583961
 
 

 ##########
 File path: 
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/operators/TimestampsAndPeriodicWatermarksOperator.java
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 @@ -41,6 +42,8 @@
 
        private transient long currentWatermark;
 
+       private StreamStatusProvider streamStatusProvider;
+
        public 
TimestampsAndPeriodicWatermarksOperator(AssignerWithPeriodicWatermarks<T> 
assigner) {
 
 Review comment:
   I missed the path before. I guess we still need the check logic in 
`TimestampsAndPunctuatedWatermarksOperator` to keep the previous behavior.

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