OpenShift 4.7 is logging a lot of 'couldn't find ipfamilies for headless service' messages

Solution Verified - Updated -


  • After upgrading to OpenShift 4.7, we noticed a significant number of logs related to couldn't find ipfamilies for headless service
  • Continual logging of messages like:
I1008 17:40:04.239011 1 utils.go:413] couldn't find ipfamilies for headless service: project-test/a-service. This could happen if controller manager is connected to an old apiserver that does not support ip families yet. EndpointSlices for this Service will use IPv4 as the IP Family based on familyOf(ClusterIP:


  • Red Hat OpenShift Container Platform (OCP)
    • 4.7

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