isReady:    ready,
		dataplane: &meshDataplane{
			kubeClient:         client.Kube(),
			netServer:          netServer,
			hostIptables:       hostIptables,
			hostsideProbeIPSet: set,
		},
	}
	s.NotReady()
	s.handlers = setupHandlers(s.ctx, s.kubeClient, s.dataplane, args.SystemNamespace)

	cniServer := startCniPluginServer(ctx, pluginSocket, s.handlers, s.dataplane)
	err = cniServer.Start()
	if err != nil {

	default:
		// Valid configuration; set isReady to true and wait for modifications before checking again
		setReady(in.isReady)
		cniInstalls.With(resultLabel.Value(resultSuccess)).Increment()
		// Pod set to "NotReady" before termination
		return watcher.Wait(ctx)
	}
}

// checkValidCNIConfig returns an error if an invalid CNI configuration is detected

Additionally, we MUST accept incoming traffic during this time, both new and existing.
Typically, it is rare to get new connections after shutdown has started - once shutdown is triggered the endpoint is marked `NotReady` and removed from load balancing consideration.
However, some applications do not utilize Service readiness (connecting directly to the pod, etc).

server in a given timeframe for whatever reasons (networking issue, machine
failure, etc.). Normally when kube-up script will encounter even one NotReady
node it will fail, even though the cluster most likely will be working. We
added an environmental variable to kube-up ALLOWED\_NOTREADY\_NODES that
defines the number of nodes that if not Ready in time won’t cause kube-up
failure.

- The deprecated taints `node.alpha.kubernetes.io/notReady` and `node.alpha.kubernetes.io/unreachable` are no longer supported or adjusted. These uses should be replaced with `node.kubernetes.io/not-ready` and `node.kubernetes.io/unreachable`

### **Scheduling**

*   Taint key `unreachable` is now in GA.
*   Taint key `notReady` is changed to `not-ready`, and is also now in GA.
*   These changes are automatically updated for taints. Tolerations for these taints must be updated manually. Specifically, you must:
    *   Change `node.alpha.kubernetes.io/notReady` to `node.kubernetes.io/not-ready`

* fixed foreground deletion of podtemplates ([#60683](https://github.com/kubernetes/kubernetes/pull/60683), [@nilebox](https://github.com/nilebox))
* Timeout docker queries to prevent node going NotReady indefinitely. ([#56967](https://github.com/kubernetes/kubernetes/pull/56967), [@jsravn](https://github.com/jsravn))

* Fix [transition between NotReady and Unreachable taints](https://github.com/kubernetes/kubernetes/issues/43444). ([#44042](https://github.com/kubernetes/kubernetes/pull/44042), [@gmarek](https://github.com/gmarek))

* Fixes a bug where if an error was returned that was not an `autorest.DetailedError` we would return `"not found", nil` which caused nodes to go to `NotReady` state. ([#57484](https://github.com/kubernetes/kubernetes/pull/57484), [@brendandburns](https://github.com/brendandburns))

 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class AbstractIterator<T extends @Nullable Object> implements Iterator<T> {
  private State state = State.NOT_READY;

  protected AbstractIterator() {}

  private enum State {
    READY,
    NOT_READY,
    DONE,
    FAILED,
  }

  @CheckForNull private T next;

  @CheckForNull
  protected abstract T computeNext();

  @CanIgnoreReturnValue