Description of problem:
Version-Release number of selected component (if applicable):
Steps to Reproduce:
This has been discussed in https://github.com/etcd-io/etcd/issues/15360
It's not a harmful error message, it merely indicates that some WALs have not been included in snapshots yet.
This was caused by changing default numbers: https://github.com/etcd-io/etcd/issues/13889
This was fixed in https://github.com/etcd-io/etcd/pull/15408/files but never backported to 3.5.
To mitigate that error and stop confusing people, we should also supply that argument when starting etcd in: https://github.com/openshift/cluster-etcd-operator/blob/master/bindata/etcd/pod.yaml#L170-L187
That way we're not surprised by changes of the default values upstream.