akalash commented on a change in pull request #18845:
URL: https://github.com/apache/flink/pull/18845#discussion_r814148032



##########
File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/PendingCheckpoint.java
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@@ -111,6 +111,8 @@
     /** The promise to fulfill once the checkpoint has been completed. */
     private final CompletableFuture<CompletedCheckpoint> onCompletionPromise;
 
+    private final PendingCheckpointStats pendingCheckpointStats;

Review comment:
       Optional as field of the class is not a good style(actually our code 
style doesn't like it as well). So I will just add Nullable where I missed it.




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