zoltar9264 commented on code in PR #21822:
URL: https://github.com/apache/flink/pull/21822#discussion_r1178595786


##########
flink-dstl/flink-dstl-dfs/src/main/java/org/apache/flink/changelog/fs/DuplicatingStateChangeFsUploader.java:
##########
@@ -51,14 +52,14 @@
  *       <li>Store the meta of files into {@link ChangelogTaskLocalStateStore} 
by
  *           AsyncCheckpointRunnable#reportCompletedSnapshotStates().
  *       <li>Pass control of the file to {@link 
LocalChangelogRegistry#register} when
- *           ChangelogKeyedStateBackend#notifyCheckpointComplete() , files of 
the previous
- *           checkpoint will be deleted by {@link 
LocalChangelogRegistry#discardUpToCheckpoint} at
- *           the same time.
+ *           FsStateChangelogWriter#persist , files of the previous checkpoint 
will be deleted by
+ *           {@link LocalChangelogRegistry#discardUpToCheckpoint} when the 
previous checkpoint is
+ *           confirmed.

Review Comment:
   ```suggestion
    *           {@link LocalChangelogRegistry#discardUpToCheckpoint} when the 
checkpoint is confirmed.
   ```



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