private static long delayMillis(int numFailures) {
        if (numFailures == 1) {
            // Retry immediately on the first failure.
            return 0;
        }
        return Backoff.ofDefault().nextDelayMillis(numFailures - 1);
    }
Fetches the internal IPs of the node.
kubernetes/src/main/java/com/linecorp/armeria/client/kubernetes/endpoints/KubernetesEndpointGroup.java