diff --git a/plugins/op_waf/waf/lua/waf_common.lua b/plugins/op_waf/waf/lua/waf_common.lua
index 029bc40d5..10f254987 100644
--- a/plugins/op_waf/waf/lua/waf_common.lua
+++ b/plugins/op_waf/waf/lua/waf_common.lua
@@ -41,6 +41,14 @@ function _M.new(self)
 end
 
 
+-- function _M.getInstance(self)
+--     if rawget(self, "instance") == nil then
+--         rawset(self, "instance", self.new())
+--     end
+--     assert(self.instance ~= nil)
+--     return self.instance
+-- end
+
 function _M.getInstance(self)
     if self.instance == nil then
         self.instance = self:new()
diff --git a/plugins/webstats/lua/webstats_common.lua b/plugins/webstats/lua/webstats_common.lua
index 8858a55eb..eb0194ce5 100644
--- a/plugins/webstats/lua/webstats_common.lua
+++ b/plugins/webstats/lua/webstats_common.lua
@@ -42,10 +42,19 @@ function _M.new(self)
 end
 
 
+-- function _M.getInstance(self)
+--     if rawget(self, "instance") == nil then
+--         rawset(self, "instance", self.new())
+--         self.cron()
+--     end
+--     assert(self.instance ~= nil)
+--     return self.instance
+-- end
+
+
 function _M.getInstance(self)
-    if rawget(self, "instance") == nil then
-        rawset(self, "instance", self.new())
-        self.cron()
+    if self.instance == nil then
+        self.instance = self:new()
     end
     assert(self.instance ~= nil)
     return self.instance
diff --git a/plugins/webstats/lua/webstats_worker.lua b/plugins/webstats/lua/webstats_worker.lua
index 53a4b0d8c..2eda941e6 100644
--- a/plugins/webstats/lua/webstats_worker.lua
+++ b/plugins/webstats/lua/webstats_worker.lua
@@ -17,4 +17,5 @@ end
 
 if ngx.worker.id() == 0 then
     ngx.timer.every(60, webstats_cron_pre)
+    WS_C:cron()
 end
\ No newline at end of file