zoltar9264 commented on code in PR #21822:
URL: https://github.com/apache/flink/pull/21822#discussion_r1170713429
##########
flink-dstl/flink-dstl-dfs/src/main/java/org/apache/flink/changelog/fs/DuplicatingStateChangeFsUploader.java:
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@@ -51,14 +52,15 @@
* <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:
The problem of not cleaning up useless local files after truncate was not
actively addressed before this PR. Previously, it was only aggressive to delete
all files referenced by checkpoints that aborted.
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