diff --git a/pkg/serverconfigs/server_address_group.go b/pkg/serverconfigs/server_address_group.go
index 0d69a20..f848af7 100644
--- a/pkg/serverconfigs/server_address_group.go
+++ b/pkg/serverconfigs/server_address_group.go
@@ -157,6 +157,7 @@ func (this *ServerAddressGroup) MatchServerName(serverName string) *ServerConfig
 		if ok {
 			server, ok := domainMap[serverName]
 			if ok {
+				this.cacheLocker.RUnlock()
 				return server
 			}
 		}
diff --git a/pkg/serverconfigs/server_address_group_test.go b/pkg/serverconfigs/server_address_group_test.go
index 7c2f655..a402703 100644
--- a/pkg/serverconfigs/server_address_group_test.go
+++ b/pkg/serverconfigs/server_address_group_test.go
@@ -75,6 +75,10 @@ func TestServerAddressGroup_MatchServerName(t *testing.T) {
 	for i := 0; i < 100_000; i++ {
 		_ = group.MatchServerName("world.hello.com")
 	}
+
+	// 检查死锁问题
+	group.MatchServerName("world2.hello.com")
+
 }
 
 func TestServerAddressGroup_MatchServerCNAME(t *testing.T) {