diff --git a/api/db/services/file_service.py b/api/db/services/file_service.py
index be225aeeb..48a665f06 100644
--- a/api/db/services/file_service.py
+++ b/api/db/services/file_service.py
@@ -345,6 +345,8 @@ class FileService(CommonService):
                 MAX_FILE_NUM_PER_USER = int(os.environ.get('MAX_FILE_NUM_PER_USER', 0))
                 if MAX_FILE_NUM_PER_USER > 0 and DocumentService.get_doc_count(kb.tenant_id) >= MAX_FILE_NUM_PER_USER:
                     raise RuntimeError("Exceed the maximum file number of a free user!")
+                if len(file.filename) >= 128:
+                    raise RuntimeError("Exceed the maximum length of file name!")
 
                 filename = duplicate_name(
                     DocumentService.query,
diff --git a/rag/llm/rerank_model.py b/rag/llm/rerank_model.py
index 925e08aa2..c42ee8944 100644
--- a/rag/llm/rerank_model.py
+++ b/rag/llm/rerank_model.py
@@ -422,10 +422,12 @@ class VoyageRerank(Base):
         self.model_name = model_name
 
     def similarity(self, query: str, texts: list):
+        rank = np.zeros(len(texts), dtype=float)
+        if not texts:
+            return rank, 0
         res = self.client.rerank(
             query=query, documents=texts, model=self.model_name, top_k=len(texts)
         )
-        rank = np.zeros(len(texts), dtype=float)
         for r in res.results:
             rank[r.index] = r.relevance_score
         return rank, res.total_tokens