diff --git a/server/apps/exam/views.py b/server/apps/exam/views.py
index a45cd9a..d3efa0b 100644
--- a/server/apps/exam/views.py
+++ b/server/apps/exam/views.py
@@ -54,6 +54,18 @@ def dectry(p):
         dec_str = dec_str+temp
     return dec_str
 
+def acquire_lock(lock_name, timeout=60):
+    identifier = str(uuid.uuid4())
+    lock = cache.set(lock_name, identifier, timeout=timeout)
+    print(lock, identifier)
+    return identifier if lock else None
+
+def release_lock(lock_name, identifier):
+    if cache.get(lock_name) == identifier:
+        cache.delete(lock_name)
+        return True
+    else:
+        raise ParseError('Lock identifier does not match')
 
 class QuestioncatViewSet(CreateUpdateCustomMixin, ModelViewSet):
     perms_map = {'get': '*', 'post':'question', 'put':'question', 'delete':'question'}
@@ -691,7 +703,7 @@ class ExamRecordViewSet(ListModelMixin, DestroyModelMixin, RetrieveModelMixin, G
                 # 获取锁
                 iden = acquire_lock('certificate')
                 if iden is None:
-                    raise ParseError("系统忙， 请稍后再试")
+                    raise ParseError("系统忙， 请稍后再试........")
                 try:
                     # 查询证明编号创建时间为最后一个
                     cer = Certificate.objects.latest('证书编号')
@@ -728,15 +740,3 @@ class ExamRecordViewSet(ListModelMixin, DestroyModelMixin, RetrieveModelMixin, G
         return Response(ExamRecordListSerializer(instance=er).data)
     
 
-def acquire_lock(lock_name, timeout=60):
-    identifier = str(uuid.uuid4())
-    lock = cache.set(lock_name, identifier, timeout=timeout)
-    print(lock, identifier)
-    return identifier if lock else None
-
-def release_lock(lock_name, identifier):
-    if cache.get(lock_name) == identifier:
-        cache.delete(lock_name)
-        return True
-    else:
-        raise ParseError('Lock identifier does not match')
\ No newline at end of file