flyrain commented on code in PR #4537:
URL: https://github.com/apache/polaris/pull/4537#discussion_r3312582344


##########
polaris-core/src/main/java/org/apache/polaris/core/storage/gcp/GcpCredentialsStorageIntegration.java:
##########
@@ -202,10 +202,11 @@ public static CredentialAccessBoundary 
generateAccessBoundaryRules(
     Map<String, List<String>> readConditionsMap = new HashMap<>();
     Map<String, List<String>> writeConditionsMap = new HashMap<>();
 
-    HashSet<String> readBuckets = new HashSet<>();
-    HashSet<String> writeBuckets = new HashSet<>();
+    LinkedHashSet<String> readBuckets = new LinkedHashSet<>();
+    LinkedHashSet<String> writeBuckets = new LinkedHashSet<>();
     Stream.concat(allowedReadLocations.stream(), 
allowedWriteLocations.stream())
         .distinct()
+        .sorted()

Review Comment:
   Worth a one-line comment that `.sorted()` here is for deterministic rule 
emission (callers of `generateAccessBoundaryRules` already treat the rules as 
order-independent, but the test fixtures now depend on this ordering). Keeps 
future readers from "simplifying" it back to a HashSet.



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