diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/utils/LRUCache.java b/dubbo-common/src/main/java/org/apache/dubbo/common/utils/LRUCache.java
index 76d6c19cb71..28440ba854d 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/utils/LRUCache.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/utils/LRUCache.java
@@ -110,6 +110,16 @@ public void clear() {
         }
     }
 
+    @Override
+    public V putIfAbsent(K key, V value) {
+        lock.lock();
+        try {
+            return super.putIfAbsent(key, value);
+        } finally {
+            lock.unlock();
+        }
+    }
+
     public void lock() {
         lock.lock();
     }