Troubleshoot on a node by creating a container running in the host namespaces and with access to the host’s filesystem.
Note that as a new builtin command, `kubectl debug` takes priority over any `kubectl` plugin named “debug”. You will need to rename the affected plugin.

- [`KT-60854`](https://youtrack.jetbrains.com/issue/KT-60854) K2: IrActualizer incorrectly generates fake overrides for synthetic java properties
- [`KT-59665`](https://youtrack.jetbrains.com/issue/KT-59665) ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS isn't reported for actual typealias and fake-override actualization

* kubelets are no longer allowed to delete their own Node API object. Prior to 1.11, in rare circumstances related to cloudprovider node ID changes, kubelets would attempt to delete/recreate their Node object at startup. Kubelets older than 1.11 are not supported running against a v1.13+ API server. If an unsupported legacy kubelet encounters this situation, a cluster admin can...

- Pod Affinity/AntiAffinity label selectors are now validated in the pod affinity score plugin ([#93758](https://github.com/kubernetes/kubernetes/pull/93758), [@damemi](https://github.com/damemi)) [SIG Scheduling]

* Pod priority and preemption is now enabled by default. Even if you don't plan to use this feature, you might need to take some action immediately after upgrading. In multi-tenant clusters where not all users are trusted, you are advised to create appropriate quotas for two default priority classes,...

    * To avoid that negative effect only use per pod metrics from pods that are:
    * - ready (so metrics about them should be valid), or
    * - unready but creation and last readiness change timestamps are apart more than 10s (pods that have formerly been ready and so metrics are in at least some cases (pod becoming unready because of overload) very useful).

For more information, see [#53040](https://github.com/kubernetes/kubernetes/issues/53040).

- Node affinity, Node selectors, and tolerations are now mutable for Jobs that are suspended and have never been started ([#105479](https://github.com/kubernetes/kubernetes/pull/105479), [@ahg-g](https://github.com/ahg-g))

  Fixed EndpointSlices metrics to reflect correctly the number of desired EndpointSlices when no endpoints are present. ([#110639](https://github.com/kubernetes/kubernetes/pull/110639), [@aojea](https://github.com/aojea)) [SIG Apps and Network]

### Bug or Regression

*   NetworkPolicy objects are now stored in etcd in v1 format. After you upgrade to version 1.9, make sure that all NetworkPolicy objects are migrated to v1. ([#51955](https://github.com/kubernetes/kubernetes/pull/51955), [@danwinship](https://github.com/danwinship))