Communication Is Blocked and Times Out and Task Fails After hostNetwork Is Set to true

apiVersion: mindxdl.gitee.com/v1
kind: AscendJob
metadata:
  name: default-test-mindspore
  labels:
    framework: mindspore     # Training framework name
    ring-controller.atlas: ascend-{xxx}b  # Processor type used by the job
spec:
  schedulerName: volcano    # This field is valid when the startup parameter enableGangScheduling of Ascend Operator is set to true.
  runPolicy:
    schedulingPolicy:      # This field is valid when the startup parameter enableGangScheduling of Ascend Operator is set to true.
      minAvailable: 2  # Total number of job replicas
     queue: default      # Queue to which a job belongs
  successPolicy: AllWorkers  #Prerequisites for a successful job
  replicaSpecs:
    Scheduler:
      replicas: 1   # Number of job replicas
      restartPolicy: Never
      template:
        metadata:
          labels:
            ring-controller.atlas: ascend-{xxx}b  # Processor type used by the job
        spec:
          hostNetwork: true    # Optional. Set this parameter as required. true indicates that the hostIP can be used to create a pod, and false indicates that the hostIP cannot be used to create a pod.
          affinity:                                         # This configuration indicates that pods of a distributed job are scheduled to different nodes.
            podAntiAffinity:
              requiredDuringSchedulingIgnoredDuringExecution:
                - labelSelector:
                    matchExpressions:
                      - key: job-name
                        operator: In
                        values:
                          - default-test-mindspore         # The value must be consistent with the preceding job name.
                  topologyKey: kubernetes.io/hostname
          nodeSelector:
            host-arch: huawei-arm              # (Optional) Set it as required.
            accelerator-type: module-{xxx}b-8   # Node type
          containers:
          - name: ascend                                     # The value must be ascend and cannot be changed.
            image: mindspore-test:latest  #Image name
            imagePullPolicy: IfNotPresent
...
            env:                                    
              - name: HCCL_IF_IP                    # Optional. Set this parameter as required.
                valueFrom:                          # If hostNetwork is set to true, also configure the HCCL_IF_IP environment variable.
                  fieldRef:                         # If hostNetwork is not configured or is set to false, the HCCL_IF_IP environment variable cannot be configured.
                    fieldPath: status.hostIP        # 
...            
            ports:                          # Collective communication port for distributed training
              - containerPort: 2222         
                name: ascendjob-port
            resources:
              limits:
                huawei.com/Ascend910: 8 # Number of applied processors
              requests:
                huawei.com/Ascend910: 8 #The value is the same as that of limits.
            volumeMounts:
...            
          volumes:
...            
    Worker:
      replicas: 1   #Number of job replicas
      restartPolicy: Never
      template:
        metadata:
          labels:
            ring-controller.atlas: ascend-{xxx}b  # Processor type used by the job
        spec:
          hostNetwork: true    # Optional. Set this parameter as required. true indicates that the hostIP can be used to create a pod, and false indicates that the hostIP cannot be used to create a pod.
          affinity:            # This configuration indicates that pods of a distributed job are scheduled to different nodes.
            podAntiAffinity:
              requiredDuringSchedulingIgnoredDuringExecution:
                - labelSelector:
                    matchExpressions:
                      - key: job-name
                        operator: In
                        values:
                          - default-test-mindspore        # The value must be consistent with the preceding job name.
                  topologyKey: kubernetes.io/hostname
          nodeSelector:
            host-arch: huawei-arm              # (Optional) Set it as required.
            accelerator-type: module-{xxx}b-8  # Node type
          containers:
          - name: ascend                            # The value must be ascend and cannot be changed.
...
            env:                                    
              - name: HCCL_IF_IP                    # Optional. Set this parameter as required.
                valueFrom:                          # If hostNetwork is set to true, also configure the HCCL_IF_IP environment variable.
                  fieldRef:                         # If hostNetwork is not configured or is set to false, the HCCL_IF_IP environment variable cannot be configured.
                    fieldPath: status.hostIP        # 
...
          - name: ASCEND_VISIBLE_DEVICES                       # This field is used by Ascend Docker Runtime.
            valueFrom:
              fieldRef:
                fieldPath: metadata.annotations['huawei.com/Ascend910']                # The value must be consistent with resources.requests below.
...
            ports:                          # Collective communication port for distributed training
              - containerPort: 2222         
                name: ascendjob-port
            resources:
              limits:
                huawei.com/Ascend910: 8 # Number of applied processors
              requests:
                huawei.com/Ascend910: 8 #The value is the same as that of limits.
            volumeMounts:
...
          volumes:
...