- PriorityClass resources will no longer be served from `scheduling.k8s.io/v1beta1` and `scheduling.k8s.io/v1alpha1` in v1.17. Migrate to the `scheduling.k8s.io/v1` API, available since v1.14. Existing persisted data can be retrieved via the `scheduling.k8s.io/v1` API.

## Changelog since v1.21.8

## Changes by Kind

### Feature

- Kube-apiserver: when merging lists, Server Side Apply now prefers the order of the submitted request instead of the existing persisted object ([#107569](https://github.com/kubernetes/kubernetes/pull/107569), [@jiahuif](https://github.com/jiahuif)) [SIG API Machinery, CLI, Cloud Provider, Cluster Lifecycle, Instrumentation, Storage and Testing]

### Bug or Regression

- `ValidatingAdmissionPolicy` and `ValidatingAdmissionPolicyBinding` objects are
  persisted in `etcd` using the `v1beta1` version. Either remove alpha objects, or disable the
  alpha `ValidatingAdmissionPolicy` feature in a `v1.27` server before upgrading to a

 * </ul>
 * <p>
 * The caching system supports different retention periods through {@link org.apache.maven.api.cache.CacheRetention}:
 * <ul>
 *   <li>PERSISTENT - Data persists across Maven invocations</li>
 *   <li>SESSION_SCOPED - Data retained for the duration of a Maven session</li>
 *   <li>REQUEST_SCOPED - Data retained only for the current build request</li>

- New configuration is introduced to the kubelet that allows it to track container images and the list of authentication information that leads to their successful pulls. This data is persisted across reboots of the host and restarts of the kubelet.
  

- Kube-apiserver: Previously persisted `CustomResourceDefinition` objects with an invalid whitespace-only `caBundle` could serve requests that did not require conversion. ([#132514](https://github.com/kubernetes/kubernetes/pull/132514), [@tiffanny29631](https://github.com/tiffanny29631))...

  - pod eviction API calls returned spurious precondition errors and required a second evict API call to succeed
  - dry-run eviction API calls persisted a DisruptionTarget condition into the pod being evicted ([#116750](https://github.com/kubernetes/kubernetes/pull/116750), [@atiratree](https://github.com/atiratree)) [SIG API Machinery and Testing]

 * by multiple concurrent threads.
 *
 * @param <K> the type of the cache's keys, which are not permitted to be null
 * @param <V> the type of the cache's values, which are not permitted to be null
 * @author Charles Fry
 * @since 10.0
 */
@DoNotMock("Use CacheBuilder.newBuilder().build()")
@GwtCompatible
public interface Cache<K, V> {

  /**

	return SRError{Cause: err, Code: ErrInternalError}
}

// SiteReplicationSys - manages cluster-level replication.
type SiteReplicationSys struct {
	sync.RWMutex

	enabled bool

	// In-memory and persisted multi-site replication state.
	state srState

	iamMetaCache srIAMCache
}

type srState srStateV1

// srStateV1 represents version 1 of the site replication state persistence
// format.

  - pod eviction API calls returned spurious precondition errors and required a second evict API call to succeed
  - dry-run eviction API calls persisted a DisruptionTarget condition into the pod being evicted ([#116554](https://github.com/kubernetes/kubernetes/pull/116554), [@atiratree](https://github.com/atiratree))