fix bug

@@ -312,7 +312,7 @@ public class UserRecallResponseResultBuilder {
         int fromIndex = 1;
         for (StrategyEnum strategy : intervalStrategyEnums) {
             int recallInterval = recallConfigService.queryStrategyConfigInterval(userRecallRequest, strategy, 10);
-            List<String> intervalKeys = (List<String>) MapUtils.getObject(strategy2IntervalKeyMap, strategy, new ArrayList<>());
+            Set<String> intervalKeys = strategy2IntervalKeyMap.get(strategy);
             if (CollectionUtils.isEmpty(intervalKeys)) {
                 this.addByIndexIndex(sknResultList, results, fromIndex++, recallInterval, (sknResult) -> strategy.equals(sknResult.getStrategy()), (sknResult) -> sknResult.isOnlyOneStrategy());
                 continue;