TheR1sing3un commented on code in PR #13606:
URL: https://github.com/apache/hudi/pull/13606#discussion_r2228162581


##########
hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/timeline/versioning/v2/TimelineArchiverV2.java:
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@@ -256,6 +260,25 @@ private List<HoodieInstant> getCommitInstantsToArchive() 
throws IOException {
       earliestInstantToRetainCandidates.add(qualifiedEarliestInstant);
     }
 
+    // 6. If archival should consider `earliest retain instant` in the clean 
plan,
+    // we should add the earliest retain instant from the clean plan to the 
candidates.
+    if (config.shouldArchiveKeepCleanPlanRetainInstant()) {

Review Comment:
   > it is resolved in `ClusteringUtils.getEarliestInstantToRetainForClustering`
   
   These two logics are not equivalent. In method 
`ClusteringUtils.getEarliestInstantToRetainForClustering`, it is only to find 
the first `clustering` instant that is larger than or equals to `retain 
instant` as a candidate. 
   <img width="1450" height="814" alt="image" 
src="https://github.com/user-attachments/assets/c723cffe-5597-45f9-86b6-e062f3efa895";
 />
   
   It is not equivalent to directly using `retain instant` as a candidate.



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