From 8eef11f342ae9b27d176179a54929cdbae5f1ad1 Mon Sep 17 00:00:00 2001
From: lexluo09 <39718951+lexluo09@users.noreply.github.com>
Date: Mon, 8 Jan 2024 17:08:38 +0800
Subject: [PATCH] (improvement)(chat) Fix the thread safety issue in parallel
 insertion of nature. (#603)

---
 .../supersonic/chat/core/knowledge/MultiCustomDictionary.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chat/core/src/main/java/com/tencent/supersonic/chat/core/knowledge/MultiCustomDictionary.java b/chat/core/src/main/java/com/tencent/supersonic/chat/core/knowledge/MultiCustomDictionary.java
index 1240e7299..cda2fdde1 100644
--- a/chat/core/src/main/java/com/tencent/supersonic/chat/core/knowledge/MultiCustomDictionary.java
+++ b/chat/core/src/main/java/com/tencent/supersonic/chat/core/knowledge/MultiCustomDictionary.java
@@ -353,7 +353,7 @@ public class MultiCustomDictionary extends DynamicCustomDictionary {
 
     }
 
-    public boolean insert(String word, String natureWithFrequency) {
+    public synchronized boolean insert(String word, String natureWithFrequency) {
         if (word == null) {
             return false;
         } else {