kuberay [Bug] Autoscaler fails if the raycluster is installed by helm with autoscaler v2 enabled and additionalWorkerGroups

Search before asking

[x] I searched the issues and found no similar issues.

KubeRay Component

Others

What happened + What you expected to happen

It would be Error in autoscaler if the raycluster is installed by helm with autoscaler v2 and additionalWorkerGroups are specified.

The error log of autoscaler is as follow:

The resources is missing in the additionalWorkerGroups(the second one in "Worker Group Specs") but the first one's resources is existed even through both of them are not specified in yaml.

If the resources are specified in the additionalWorkerGroups, the raycluster could run correctly.

Reproduction script

Run the following command with the yaml file below:

helm install raycluster kuberay/ray-cluster -f raycluster_helm.yaml

raycluster_helm.yaml:

image:
  repository: rayproject/ray
  tag: 2.46.0
head:
  rayStartParams:
    num-cpus: "0"
  enableInTreeAutoscaling: true
  autoscalerOptions:
    version: v2
    upscalingMode: Default
    idleTimeoutSeconds: 600 # 10 minutes
  resources:
    limits:
      cpu: 1
      memory: 4G
    requests:
      cpu: 1
      memory: 4G
worker:
  groupName: standard-worker
  replicas: 0
  minReplicas: 0
  maxReplicas: 5
additionalWorkerGroups:
  additional-worker-group1:
    image:
      repository: rayproject/ray
      tag: 2.46.0
      pullPolicy: IfNotPresent
    disabled: false
    replicas: 0
    minReplicas: 0
    maxReplicas: 5
#    resources:
#      limits:
#        cpu: "1"
#        memory: "1G"
#      requests:
#        cpu: "1"
#        memory: "1G"

The raycluster could run correctly if the resources at the bottom is uncommented.