Service does not work after deleting one pod in a deployment - kubernetes

Question

I apply a deployment of 2 some http pods, and a service for it, and it works fine. I can curl the serviceip or servicename. The service did round robin well.
But after I delete one pod, k8s create a new one to replace it. When I curl the service, the new pod doesn't return, only the other old one is OK.
The question is why k8s not update new pod to the service so I can curl the serviceip or servicename as before?
Deployment:
apiVersion: apps/v1
kind: Deployment
metadata:
name: mvn-dp
spec:
selector:
matchLabels:
run: mvn-demo
replicas: 2
template:
metadata:
labels:
run: mvn-demo
spec:
containers:
- name: mvndemo
image: 192.168.0.193:59999/mvndemo
ports:
- containerPort: 8080
Service:
apiVersion: v1
kind: Service
metadata:
name: mvn-svc
labels:
run: mvn-demo
spec:
ports:
- port: 8080
protocol: TCP
#type: NodePort
selector:
run: mvn-demo
kdes svc mvn-svc
Name: mvn-svc
Namespace: default
Labels: run=mvn-demo
Annotations: Selector: run=mvn-demo
Type: ClusterIP
IP: 10.97.21.218
Port: <unset> 8080/TCP
TargetPort: 8080/TCP
Endpoints: 100.101.153.220:8080,100.79.233.220:8080
Session Affinity: None
Events: <none>
kpod
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
mvn-dp-8f59c694f-2mwq8 1/1 Running 0 81m 100.79.233.220 worker2 <none> <none>
mvn-dp-8f59c694f-xmt6m 1/1 Running 0 87m 100.101.153.220 worker3 <none> <none>
[root#master1 k8s-yaml]# curl http://10.97.21.218:8080
Hello Docker World, from: mvn-dp-8f59c694f-xmt6m
[root#master1 k8s-yaml]# curl http://10.97.21.218:8080
**curl: (7) Failed connect to 10.97.21.218:8080; 连接超时(connetion timeout)**
As u can see the age of mvn-dp-8f59c694f-2mwq8 is newer than the other one, because I deleted one pod and k8s replace it with this new one.

Answer 1

Set a label to your deployment metadata
apiVersion: apps/v1
kind: Deployment
metadata:
name: mvn-dp
labels:
run: mvn-demo
it will work