cluster-network-operator failing to start metrics server on port 8080 in OpenShift Container Platform 4.16

Issue

• During the update to OpenShift 4.16, it was observed that cluster-network-operator is stuck in CrashLoopBackOff state because of the below error reported.

  Raw

  2024-09-19T16:32:46.503056041Z I0917 16:32:46.503016       1 controller.go:242] "All workers finished" controller="pod-watcher"
  2024-09-19T16:32:46.503056041Z I0917 16:32:46.503045       1 internal.go:526] "Stopping and waiting for caches"
  2024-09-19T16:32:46.503209536Z I0917 16:32:46.503189       1 internal.go:530] "Stopping and waiting for webhooks"
  2024-09-19T16:32:46.503209536Z I0917 16:32:46.503206       1 internal.go:533] "Stopping and waiting for HTTP servers"
  2024-09-19T16:32:46.503217413Z I0917 16:32:46.503212       1 internal.go:537] "Wait completed, proceeding to shutdown the manager"
  2024-09-19T16:32:46.503231142Z F0917 16:32:46.503221       1 operator.go:130] Failed to start controller-runtime manager: failed to start metrics server: failed to create listener: listen tcp :8080: bind: address already in use
  

• It was observed that the update to OpenShift 4.16 is stuck because CNO is failing to start because of port conflict with port 8080