The cri-tools project, which aims to provide consistent tooling for operators to debug and introspect their nodes in production independent of their chosen container runtime, graduated to GA.

* The NamespaceExists and NamespaceAutoProvision admission controllers have been removed. ([#31250](https://github.com/kubernetes/kubernetes/pull/31250), [@derekwaynecarr](https://github.com/derekwaynecarr))
    * All cluster operators should use NamespaceLifecycle.

* The NamespaceExists and NamespaceAutoProvision admission controllers have been removed. ([#31250](https://github.com/kubernetes/kubernetes/pull/31250), [@derekwaynecarr](https://github.com/derekwaynecarr))
    * All cluster operators should use NamespaceLifecycle.

- [Namespaced Brokers](https://svc-cat.io/docs/namespaced-broker-resources/), which enable operators to install a broker into a namespace instead of the cluster level, reached GA.
- The [Service Plan Defaults](https://svc-cat.io/docs/service-plan-defaults/) feature is in alpha and is under active development. This feature gives operators the ability to define defaults for when someone provisions a service.

on average) and rapid updates to pod configuration should take effect sooner.
  
  A new metric `kubelet_known_pods` has been added at ALPHA stability to report the number of pods a Kubelet is tracking in a number of internal states.  Operators may use the metrics to track an excess of pods in the orphaned state that may not be completing. ([#113145](https://github.com/kubernetes/kubernetes/pull/113145), [@smarterclayton](https://github.com/smarterclayton)) [SIG API Machinery, Auth, Cloud...

    assertEquals(1, Iterators.size(registry.getSubscribers(1)));

    registry.register(new IntegerSubscriber());
    assertEquals(3, Iterators.size(registry.getSubscribers("")));
    assertEquals(1, Iterators.size(registry.getSubscribers(new Object())));
    assertEquals(2, Iterators.size(registry.getSubscribers(1)));
  }

  public void testGetSubscribers_returnsImmutableSnapshot() {

     */
    public MultiIterator(final Iterator<E>... iterators) {
        assertArgumentNotNull("iterators", iterators);
        this.iterators = iterators;
    }

    @Override
    public boolean hasNext() {
        for (; index < iterators.length; ++index) {
            if (iterators[index].hasNext()) {
                return true;
            }
        }

import static com.google.common.collect.Iterators.advance;
import static com.google.common.collect.Iterators.all;
import static com.google.common.collect.Iterators.any;
import static com.google.common.collect.Iterators.elementsEqual;
import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.collect.Iterators.filter;
import static com.google.common.collect.Iterators.find;

            if (graph.isDirected()) {
              return Iterators.unmodifiableIterator(
                  Iterators.concat(
                      Iterators.transform(
                          graph.predecessors(node).iterator(),
                          (N predecessor) -> EndpointPair.ordered(predecessor, node)),
                      Iterators.transform(

    checkNotNull(iterable);
    Iterators.checkNonnegative(position);
    if (iterable instanceof List) {
      List<? extends T> list = (List<? extends T>) iterable;
      return (position < list.size()) ? list.get(position) : defaultValue;
    } else {
      Iterator<? extends T> iterator = iterable.iterator();
      Iterators.advance(iterator, position);
      return Iterators.getNext(iterator, defaultValue);
    }
  }