diff --git a/pipeline/engine/models/function.py b/pipeline/engine/models/function.py
index d6429e4e..9f31cad2 100644
--- a/pipeline/engine/models/function.py
+++ b/pipeline/engine/models/function.py
@@ -45,7 +45,11 @@ def init_db(self):
             logger.error("function switch init failed: %s" % traceback.format_exc())
 
     def is_frozen(self):
-        return self.get(name=function_switch.FREEZE_ENGINE).is_active
+        try:
+            is_frozen = self.get(name=function_switch.FREEZE_ENGINE).is_active
+        except FunctionSwitch.DoesNotExist:
+            is_frozen = None
+        return is_frozen
 
     def freeze_engine(self):
         self.filter(name=function_switch.FREEZE_ENGINE).update(is_active=True)