chia7712 commented on code in PR #20334:
URL: https://github.com/apache/kafka/pull/20334#discussion_r2292051717


##########
storage/src/main/java/org/apache/kafka/storage/internals/log/UnifiedLog.java:
##########
@@ -1887,8 +1887,10 @@ public int deleteOldSegments() throws IOException {
             return deleteLogStartOffsetBreachedSegments() +
                     deleteRetentionSizeBreachedSegments() +
                     deleteRetentionMsBreachedSegments();
-        } else {
+        } else if (config().compact) {
             return deleteLogStartOffsetBreachedSegments();
+        } else {
+            return deleteLogStartOffsetBreachedSegments() + 
deleteRetentionSizeBreachedSegments();

Review Comment:
   That means `validateRemoteStorageRequiresDeleteCleanupPolicy` should be 
removed, since an empty policy is supported by remote storage now. Also, 
`deleteOldSegments` should handle all deletions when `remoteLogEnabled` is true.



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