diff --git a/requirements.txt b/requirements.txt
index db65bc8..412420c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -78,3 +78,4 @@ streamlit-modal>=0.1.0
 streamlit-aggrid>=0.3.4.post3
 watchdog>=3.0.0
 docx2txt
+elasticsearch
\ No newline at end of file
diff --git a/server/chat/knowledge_base_chat.py b/server/chat/knowledge_base_chat.py
index 60956b4..79ed159 100644
--- a/server/chat/knowledge_base_chat.py
+++ b/server/chat/knowledge_base_chat.py
@@ -78,11 +78,12 @@ async def knowledge_base_chat(query: str = Body(..., description="用户输入",
             max_tokens=max_tokens,
             callbacks=[callback],
         )
-        docs = await run_in_threadpool(search_docs,
-                                       query=query,
-                                       knowledge_base_name=knowledge_base_name,
-                                       top_k=top_k,
-                                       score_threshold=score_threshold)
+        docs = search_docs(query, knowledge_base_name, 10, score_threshold)
+        # docs = await run_in_threadpool(search_docs,
+        #                                query=query,
+        #                                knowledge_base_name=knowledge_base_name,
+        #                                top_k=10,
+        #                                score_threshold=score_threshold)
 
         # 加入reranker
         if USE_RERANKER:
@@ -99,6 +100,7 @@ async def knowledge_base_chat(query: str = Body(..., description="用户输入",
                                                      query=query)
             print("---------after rerank------------------")
             print(docs)
+
         context = "\n".join([doc.page_content for doc in docs])
 
         if len(docs) == 0:  # 如果没有找到相关文档，使用empty模板
diff --git a/server/knowledge_base/kb_service/es_kb_service.py b/server/knowledge_base/kb_service/es_kb_service.py
index 14d6e43..77f0d02 100644
--- a/server/knowledge_base/kb_service/es_kb_service.py
+++ b/server/knowledge_base/kb_service/es_kb_service.py
@@ -36,12 +36,12 @@ class ESKBService(KBService):
         except Exception as e:
             logger.error(f"Error 发生 : {e}")
             raise e
-        try:
-            # 首先尝试通过es_client_python创建
-            self.es_client_python.indices.create(index=self.index_name)
-        except BadRequestError as e:
-            logger.error("创建索引失败,重新")
-            logger.error(e)
+        # try:
+        #     # 首先尝试通过es_client_python创建
+        #     self.es_client_python.indices.create(index=self.index_name)
+        # except BadRequestError as e:
+        #     logger.error("创建索引失败,重新")
+        #     logger.error(e)
 
         try:
             # langchain ES 连接、创建索引
@@ -156,15 +156,17 @@ class ESKBService(KBService):
                 logger.error(f"ES Docs Delete Error! {e}")
 
     def do_delete_doc(self, kb_file, **kwargs):
+        base_file_name = os.path.basename(kb_file.filepath)
         if self.es_client_python.indices.exists(index=self.index_name):
             # 从向量数据库中删除索引(文档名称是Keyword)
             query = {
                 "query": {
                     "term": {
-                        "metadata.source.keyword": kb_file.filepath
+                        "metadata.source.keyword": base_file_name
                     }
                 }
             }
+            print(f"***do_delete_doc: kb_file.filepath:{kb_file.filepath}, base_file_name:{base_file_name}")
             # 注意设置size，默认返回10个。
             search_results = self.es_client_python.search(body=query, size=50)
             delete_list = [hit["_id"] for hit in search_results['hits']['hits']]
diff --git a/server/knowledge_base/utils.py b/server/knowledge_base/utils.py
index f47a792..d198c68 100644
--- a/server/knowledge_base/utils.py
+++ b/server/knowledge_base/utils.py
@@ -66,6 +66,7 @@ def list_files_from_folder(kb_name: str):
         if is_skiped_path(entry.path):
             return
 
+    
         if entry.is_symlink():
             target_path = os.path.realpath(entry.path)
             with os.scandir(target_path) as target_it:
@@ -79,10 +80,16 @@ def list_files_from_folder(kb_name: str):
                 for sub_entry in it:
                     process_entry(sub_entry)
 
-    with os.scandir(doc_path) as it:
-        for entry in it:
-            process_entry(entry)
+    #added by weiweiwang 2024.1.3 for catch exception
+    try:
+        print(f"list_files_from_folder,doc_path:{doc_path}")
+        with os.scandir(doc_path) as it:
+            for entry in it:
+                process_entry(entry)
 
+    except Exception as e:
+        logger.error(f"Error 发生 : {e}")
+    
     return result
 
 #PDFPlumberLoader
diff --git a/server/reranker/reranker.py b/server/reranker/reranker.py
index c6cbebf..cac8d78 100644
--- a/server/reranker/reranker.py
+++ b/server/reranker/reranker.py
@@ -46,7 +46,7 @@ class LangchainReranker(BaseDocumentCompressor):
         # self.activation_fct=activation_fct
         # self.apply_softmax=apply_softmax
 
-        self._model = CrossEncoder(model_name=model_name_or_path, max_length=1024, device=device)
+        self._model = CrossEncoder(model_name=model_name_or_path, max_length=512, device=device)
         super().__init__(
             top_n=top_n,
             model_name_or_path=model_name_or_path,
diff --git a/webui_pages/knowledge_base/knowledge_base.py b/webui_pages/knowledge_base/knowledge_base.py
index 31fc151..fd61d7f 100644
--- a/webui_pages/knowledge_base/knowledge_base.py
+++ b/webui_pages/knowledge_base/knowledge_base.py
@@ -285,6 +285,7 @@ def knowledge_base_page(api: ApiRequest, is_lite: bool = None):
 
         st.divider()
 
+        #added by weiweiw 2024.1.3
         # cols = st.columns(3)
 
         # if cols[0].button(
@@ -318,6 +319,7 @@ def knowledge_base_page(api: ApiRequest, is_lite: bool = None):
         # with st.sidebar:
         #     keyword = st.text_input("查询关键字")
         #     top_k = st.slider("匹配条数", 1, 100, 3)
+        #ending added by weiweiw 2024.1.3
 
         st.write("文件内文档列表。双击进行修改，在删除列填入 Y 可删除对应行。")
         docs = []