xiangfu0 commented on code in PR #19287:
URL: https://github.com/apache/pinot/pull/19287#discussion_r3801910230


##########
pinot-core/src/main/java/org/apache/pinot/core/operator/filter/VectorSimilarityFilterOperator.java:
##########
@@ -381,11 +523,14 @@ private ImmutableRoaringBitmap executeSearch() {
 
       return annResults;
     } finally {
-      // Record search metrics for observability — always, regardless of which 
path was taken
-      VectorSearchMetrics.getInstance().recordSearch(_vectorSearchMode, 
_backendType);
+      if (searchExecuted) {
+        VectorSearchMetrics.getInstance().recordSearch(_vectorSearchMode, 
_backendType);
+      }
       // Refresh explain context with the final search mode decided during 
execution
-      refreshExplainContext(null);
-      clearBackendParams(column);
+      refreshExplainContext();
+      if (backendParamsConfigured) {
+        clearBackendParams(column);
+      }

Review Comment:
   Addressed by the same exception-safety fix in 2c163f07e9: cleanup is armed 
before backend configuration and runs from an inner finally even if 
configuration only partially succeeds. The regression verifies the cleanup 
calls after an injected setter failure.



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