I have a multi deployments application on K8s and suddenly DNS randomly fails for one of the components (deployer). From inside the deployer pod if I run curl command with the service name or service IP of another component (bridge) randomly I get:

curl -v http://bridge:9998
* Could not resolve host: bridge
* Expire in 200 ms for 1 (transfer 0x555f0636fdd0)
* Closing connection 0
curl: (6) Could not resolve host: bridge

But if I use the IP of bridge pod it can resolve and connects:

curl -v http://10.36.0.25:9998
* Expire in 0 ms for 6 (transfer 0x558d6c3eadd0)
*   Trying 10.36.0.25...
* TCP_NODELAY set
* Expire in 200 ms for 4 (transfer 0x558d6c3eadd0)
* Connected to 10.36.0.25 (10.36.0.25) port 9998 (#0)
> GET / HTTP/1.1
> Host: 10.36.0.25:9998
> User-Agent: curl/7.64.0
> Accept: */*
> 
< HTTP/1.1 200 OK
< X-Powered-By: Express
< Accept-Ranges: bytes
< Cache-Control: public, max-age=0
< Last-Modified: Mon, 08 Apr 2019 14:06:42 GMT
< ETag: W/"179-169fd45c550"
< Content-Type: text/html; charset=UTF-8
< Content-Length: 377
< Date: Wed, 11 Sep 2019 08:25:24 GMT
< Connection: keep-alive

And my deployer yaml file:

---
apiVersion: v1
kind: Service
metadata:
  annotations:
    Process: deployer
  creationTimestamp: null
  labels:
    io.kompose.service: deployer
  name: deployer
spec:
  ports:
  - name: "8004"
    port: 8004
    targetPort: 8004
  selector:
    io.kompose.service: deployer
status:
  loadBalancer: {}
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    Process: deployer
  creationTimestamp: null
  labels:
    io.kompose.service: deployer
  name: deployer
spec:
  replicas: 1
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        io.kompose.service: deployer
    spec:
      containers:
      - args:
        - bash
        - -c
        - lttng create && python src/rest.py
        env:
        - name: CONFIG_OVERRIDE
          value: {{ .Values.CONFIG_OVERRIDE | quote}}
        - name: WWS_RTMP_SERVER_URL
          value: {{ .Values.WWS_RTMP_SERVER_URL | quote}}
        - name: WWS_DEPLOYER_DEFAULT_SITE
          value: {{ .Values.WWS_DEPLOYER_DEFAULT_SITE | quote}}
        image: {{ .Values.image }}
        name: deployer
        readinessProbe:
          exec:
            command:
            - ls
            - /tmp
          initialDelaySeconds: 5
          periodSeconds: 5
        ports:
        - containerPort: 8004
        resources:
          requests:
            cpu: 0.1
            memory: 250Mi
          limits:
            cpu: 2
            memory: 5Gi
      restartPolicy: Always
      imagePullSecrets:
      - name: deployersecret
status: {}

As I mentioned this happens for just this component and I ran the exact same command from inside other pods and it works properly. Any idea how I can solve this issue?

Update

Since people is getting this wrong I describe the situation more: The yaml file above belongs to the component that is facing this problem (other components working properly) and the curl command is the command that I run from inside this troubled pod. If I run the exact same command from within another pod it resolves. And below is the deployment and service of the target for your information:

apiVersion: v1
kind: Service
metadata:
  annotations:
    Process: bridge
  creationTimestamp: null
  labels:
    io.kompose.service: bridge
  name: bridge
spec:
  ports:
  - name: "9998"
    port: 9998
    targetPort: 9998
  - name: "9226"
    port: 9226
    targetPort: 9226
  - name: 9226-udp
    port: 9226
    protocol: UDP
    targetPort: 9226
  selector:
    io.kompose.service: bridge
status:
  loadBalancer: {}
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    Process: bridge
  creationTimestamp: null
  labels:
    io.kompose.service: bridge
  name: bridge
spec:
  replicas: 1
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        io.kompose.service: bridge
    spec:
      containers:
      - args:
        - bash
        - -c
        - npm run startDebug
        env:
        - name: NODE_ENV
          value: {{ .Values.NODE_ENV | quote }}
        image: {{ .Values.image }}
        name: bridge
        readinessProbe:
          httpGet:
            port: 9998
          initialDelaySeconds: 3
          periodSeconds: 15
        ports:
        - containerPort: 9998
        - containerPort: 9226
        - containerPort: 9226
          protocol: UDP
        resources:
          requests:
            cpu: 0.1
            memory: 250Mi
          limits:
            cpu: 2
            memory: 5Gi
      restartPolicy: Always
      imagePullSecrets:
      - name: bridgesecret
status: {}