`Initializers` admission plugin is enabled.([#51436](https://github.com/kubernetes/kubernetes/pull/51436))

* [Action required] The validation rule for metadata.initializers.pending[x].name is tightened. The initializer name must contain at least three segments, separated by dots. You can create objects with pending initializers and not rely on the API server to add pending initializers according to `initializerConfiguration`. If you do so, update the initializer name in the existing objects...

- `kubectl exec` now allows using the resource name to select a matching pod and `--pod-running-timeout` flag to wait till at least one pod is running. ([#73664](https://github.com/kubernetes/kubernetes/pull/73664), [@prksu](https://github.com/prksu))

   ([#121954](https://github.com/kubernetes/kubernetes/pull/121954), [@AxeZhan](https://github.com/AxeZhan))
- The watch cache now waits until it is at least as fresh as the given requestedWatchRV if sendInitialEvents was requested.
   ([#122830](https://github.com/kubernetes/kubernetes/pull/122830), [@p0lyn0mial](https://github.com/p0lyn0mial))

* kubectl port-forward now allows using resource name (e.g., deployment/www) to select a matching pod, as well as the use of --pod-running-timeout to wait until at least one pod is running. ([#59705](https://github.com/kubernetes/kubernetes/pull/59705), [@phsiao](https://github.com/phsiao))

- In the `wait.PollUntilContextTimeout` function, if `immediate` is true, the condition will now be invoked before waiting, guaranteeing that the condition is invoked at least once and then wait a interval before executing again. ([#119762](https://github.com/kubernetes/kubernetes/pull/119762), [@AxeZhan](https://github.com/AxeZhan))

You can still access kubelet's `/healthz`, `/pods` and `/configz` by granting the caller `nodes/proxy` permission in RBAC but that also grants the caller permissions to exec, run and attach to containers on the nodes and doing so does not follow the least privilege principle. Granting callers more permissions than they need can give attackers an opportunity to escalate privileges. ([#126347](https://github.com/kubernetes/kubernetes/pull/126347), [@vinayakankugoyal](https://github.com/vinayakankugoyal))...

  - apiserver_flowcontrol_current_r: R(the time of the last change in state of the queues)
  - apiserver_flowcontrol_dispatch_r: R(the time of the latest request dispatch)
  - apiserver_flowcontrol_latest_s: S(the request last dispatched) = R(when that request starts executing in the virtual world)

    public static final int SMB2_LEASE_FULL           = 0x07;  // RWH
}
```

### 3.2 Lease Versions
- **Lease V1**: Basic lease support (SMB 3.0)
- **Lease V2**: Adds epoch support for better consistency (SMB 3.0.2+)

## 4. Data Structures

### 4.1 Lease Key Structure
```java
package jcifs.internal.smb2.lease;

import java.security.SecureRandom;
import java.util.Arrays;

public class Smb2LeaseKey {

func (a AccElem) asTimedAction() madmin.TimedAction {
	return madmin.TimedAction{AccTime: uint64(a.Total), Count: uint64(a.N), Bytes: uint64(a.Size)}
}

// lastMinuteLatency keeps track of last minute latency.
type lastMinuteLatency struct {
	Totals  [60]AccElem
	LastSec int64
}

// Merge data of two lastMinuteLatency structure

  const maxMajor = 4\n\n    if (version[0] < ltMajor && version[1] < minMinor || version[0] === minMajor && version[1] === minMinor && version[2] < minPatch || version[0] >= maxMajor) {\n      throw new Error('Bootstrap\\'s JavaScript requires at least jQuery v1.9.1 but less than v4.0.0')\n    }\n  }\n}\n\nUtil.jQueryDetection()\nsetTransitionEndSupport()\n\nexport default Util\n","/**\n * --------------------------------------------------------------------------\n * Bootstrap (v4.6.2): alert.js\n...