diff --git a/internal/ingress/controller/controller.go b/internal/ingress/controller/controller.go
index 708e20f..580f476 100644
--- a/internal/ingress/controller/controller.go
+++ b/internal/ingress/controller/controller.go
@@ -1,6 +1,6 @@
 /*
 Copyright 2015 The Kubernetes Authors.
-Copyright 2022 The Alibaba Authors.
+Copyright 2022-2023 The Alibaba Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -159,11 +159,13 @@ func (n *NGINXController) syncIngress(interface{}) error {
 	klog.Infof("Configuration changes detected.")
 
 	n.metricCollector.SetHosts(hosts)
+
 	hash, _ := hashstructure.Hash(pcfg, &hashstructure.HashOptions{
 		TagName: "json",
 	})
 
 	pcfg.ConfigurationChecksum = fmt.Sprintf("%v", hash)
+
 	err := n.OnUpdate(*pcfg)
 	if err != nil {
 		n.metricCollector.IncReloadErrorCount()
@@ -477,7 +479,7 @@ func (n *NGINXController) getDefaultUpstream() *ingress.Backend {
 }
 
 // getConfiguration returns the configuration matching the standard kubernetes ingress
-func (n *NGINXController) getConfiguration(ingresses []*ingress.Ingress) (sets.String, []*ingress.Server, *ingress.Configuration) {
+func (n *NGINXController) getConfiguration(ingresses []*ingress.Ingress) (sets.Set[string], []*ingress.Server, *ingress.Configuration) {
 
 	upstreams, servers := n.getBackendServers(ingresses)
 	var passUpstreams []*ingress.SSLPassthroughBackend