- Fix an ephemeral port exhaustion bug caused by improper connection management that occurred when a large number of objects were handled by kubectl while exec auth was in use. ([#112336](https://github.com/kubernetes/kubernetes/pull/112336), [@enj](https://github.com/enj)) [SIG API Machinery and Auth]

- Fixed a bug where the kubelet choose the wrong container by its name when running `kubectl exec`. ([#113041](https://github.com/kubernetes/kubernetes/pull/113041), [@saschagrunert](https://github.com/saschagrunert))

- Fixes a 1.30+ regression in connection stability for exec / attach / portforward requests initiated using a websocket client ([#130253](https://github.com/kubernetes/kubernetes/pull/130253), [@fuweid](https://github.com/fuweid)) [SIG API Machinery, CLI and Testing]

## Changes by Kind

### Bug or Regression

- Fix an ephemeral port exhaustion bug caused by improper connection management that occurred when a large number of objects were handled by kubectl while exec auth was in use. ([#112338](https://github.com/kubernetes/kubernetes/pull/112338), [@enj](https://github.com/enj)) [SIG API Machinery and Auth]

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    String SCHEDULER_JOB_CLASS = "scheduler.job.class";

    /** The key of the configuration. e.g. QUIT */
    String SCHEDULER_CONCURRENT_EXEC_MODE = "scheduler.concurrent.exec.mode";

    /** The key of the configuration. e.g. 30 */
    String SCHEDULER_MONITOR_INTERVAL = "scheduler.monitor.interval";

- `kubectl run` can set a service account name in the generated pod
  spec with the `--serviceaccount` flag.

- `kubectl proxy` now correctly handles the `exec`, `attach`, and
  `portforward` commands.  You must pass `--disable-filter` to the command to allow these commands.

- Added `cronjobs.batch` to "all", so that `kubectl get all` returns them.

 - Modify a crashing container for easier debugging by changing its image, for example to busybox, or its command, for example, to `sleep 1d` so you have time to `kubectl exec`.
 - Inspect configuration files on a node's host filesystem