diff --git a/face-search-core/src/main/java/com/visual/face/search/core/utils/Similarity.java b/face-search-core/src/main/java/com/visual/face/search/core/utils/Similarity.java
index 7ce5b45..b8a0e23 100644
--- a/face-search-core/src/main/java/com/visual/face/search/core/utils/Similarity.java
+++ b/face-search-core/src/main/java/com/visual/face/search/core/utils/Similarity.java
@@ -46,6 +46,8 @@ public class Similarity {
                 distance += temp;
             }
             distance = Math.sqrt(distance);
+        }else {
+            throw new RuntimeException("vector length not equal");
         }
         return (float) distance;
     }