Merged PR 7177841: fix thread exist when key not exists

fix thread exist when key not exists

Public: sonic-net#12769

Author: Jie Cai

src/sonic-bgpcfgd/bgpcfgd/static_rt_timer.py

@@ -16,6 +16,9 @@ def __init__(self):
 
     def set_timer(self):
         """ Check for custom route expiry time in STATIC_ROUTE:EXPIRY_TIME """
+        keys = self.db.keys(self.db.APPL_DB, "STATIC_ROUTE_EXPIRY_TIME")
+        if len(keys) == 0:
+            return
         timer = self.db.get(self.db.APPL_DB, "STATIC_ROUTE_EXPIRY_TIME", "time")
         if timer is not None:
             timer = int(timer)