title: KEDA not scaling pods based on RabbitMQ queue length
body: <p>I'm trying to use KEDA to auto-scale a Celery worker pod based on the current length of a RabbitMQ message queue. The worker runs as expected, however, it is not scaling under load.</p>
  <p>For reference, I'm using KEDA v2.7.1.</p>
  <p>Logs from keda-operator pod:</p>
  <pre><code>1.6569289126033094e+09  ERROR   controller.scaledobject Reconciler error        {&quot;reconciler group&quot;: &quot;keda.sh&quot;, &quot;reconciler kind&quot;: &quot;ScaledObject&quot;, &quot;name&quot;: &quot;celery-worker-scaler&quot;, &quot;namespace&quot;: &quot;default&quot;, &quot;error&quot;: &quot;error establishing rabbitmq connection: dial tcp: lookup rabbitmq on 10.96.0.10:53: server misbehaving&quot;}
  sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem
          /go/pkg/mod/sigs.k8s.io/controller-runtime@v0.11.2/pkg/internal/controller/controller.go:266
  sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2
          /go/pkg/mod/sigs.k8s.io/controller-runtime@v0.11.2/pkg/internal/controller/controller.go:227
  </code></pre>
  <p>Clearly there is some issue with connecting to the rabbitmq pod</p>
  <p>keda.yaml:</p>
  <pre><code>apiVersion: keda.sh/v1alpha1
  kind: ScaledObject
  metadata:
    name: celery-worker-scaler
    namespace: default
  spec:
    scaleTargetRef:
      name: celery-worker
    pollingInterval: 3
    minReplicaCount: 1
    maxReplicaCount: 10
    triggers:
      - type: rabbitmq
        metadata:
          host: amqp://guest:guest@rabbitmq:5672
          protocol: amqp
          queueName: celery
          mode: QueueLength
          value: &quot;5&quot;
  </code></pre>
  <p>rabbitmq.yaml:</p>
  <pre><code># deployment
  apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: rabbitmq
    labels:
      app: rabbitmq
  spec:
    replicas: 1
    selector:
      matchLabels:
        app: rabbitmq
    template:
      metadata:
        labels:
          app: rabbitmq
      spec:
        containers:
        - name: rabbitmq
          image: rabbitmq:management
          env:
            - name: RABBITMQ_DEFAULT_USER
              valueFrom:
                secretKeyRef:
                  name: secret
                  key: rabbitmq-user
            - name: RABBITMQ_DEFAULT_PASS
              valueFrom:
                secretKeyRef:
                  name: secret
                  key: rabbitmq-password
          ports:
          - containerPort: 15672
            name: management
          - containerPort: 5672
            name: rabbitmq
  ---
  # service
  apiVersion: v1
  kind: Service
  metadata:
    name: rabbitmq
    labels:
      app: rabbitmq
  spec:
    selector:
      app: rabbitmq
    ports:
    - port: 5672
      name: rabbitmq
      targetPort: rabbitmq
      protocol: TCP
    - port: 15672
      name: rabbitmq-mgmt
      targetPort: management
  </code></pre>