diff --git a/server/apps/exam/views.py b/server/apps/exam/views.py
index 6a7b8b1..a45cd9a 100644
--- a/server/apps/exam/views.py
+++ b/server/apps/exam/views.py
@@ -731,6 +731,7 @@ class ExamRecordViewSet(ListModelMixin, DestroyModelMixin, RetrieveModelMixin, G
 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):