update monitor nm heart time

nm/start.go

@@ -201,7 +201,7 @@ func monitorWorker(op *operate.DockerOp) {
 				for {
 					sub := time.Now().Sub(nodeManager.GetLastHeartTime()).Seconds()
 					log.WithField("time(uint seconds)", sub).Info("The time difference since the last heartbeat")
-					if sub > time.Duration(conf.GetConfig().HeartRespTimeSecond).Seconds() {
+					if int64(sub) > conf.GetConfig().HeartRespTimeSecond {
 						if nodeManager.Status {
 							nodeManager.UpdateStatus(false)
 						}