we have the following setup on our openshift-environment:

Application A in namespace B which is exposed via a route and the following configuration regarding load-balancing:

haproxy.router.openshift.io/balance: roundrobin
haproxy.router.openshift.io/disable_cookies: 'True'

Application C in namespace D (same cluster) which is called by application A via an (internal) service.

Currently we are experiencing good load-balancing for the pods of application A which means the pods have roughly the same cpu/memory usage and requests/second.

However, application C which is called via the service shows (for example for two pods) average requests/second in a proportion of 1:2. The only information in the documentation I could find is that under normal circumstances kubernetes should load-balance this kind of internal service calls.

sessionAffinity: None

is also set.

We are using Openshift v3.11.161 (Kubernetes v1.11). Is there anything I'm not aware of?

EDIT: Service object:

apiVersion: v1
kind: Service
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: >
      {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app":"test","template":"test-template"},"name":"test-service","namespace":"namespace"},"spec":{"ports":[{"name":"8080-tcp","port":8080,"protocol":"TCP","targetPort":8080}],"selector":{"deploymentconfig":"test-dc"},"sessionAffinity":"None"}}
  creationTimestamp: 'timestamp'
  labels:
    app: test
    template: test-template
  name:test-service
  namespace: namespace
  resourceVersion: '73875211'
  selfLink: /test/test
  uid: uid
spec:
  clusterIP: x.y.z
  ports:
    - name: 8080-tcp
      port: 8080
      protocol: TCP
      targetPort: 8080
  selector:
    deploymentconfig: test
  sessionAffinity: None
  type: ClusterIP
status:
  loadBalancer: {}

Kind regards