- PersistentVolumeClaim objects are no longer left with storage class set to `nil` forever, but will be updated retroactively once any StorageClass is set or created as default. ([#111467](https://github.com/kubernetes/kubernetes/pull/111467), [@RomanBednar](https://github.com/RomanBednar))

* Fix data race during addition of new CRD ([#50098](https://github.com/kubernetes/kubernetes/pull/50098), [@nikhita](https://github.com/nikhita))
* Fix bug in scheduler that caused initially unschedulable pods to stuck in Pending state forever. ([#50028](https://github.com/kubernetes/kubernetes/pull/50028), [@julia-stripe](https://github.com/julia-stripe))

* Fix bug in scheduler that caused initially unschedulable pods to stuck in Pending state forever. ([#50028](https://github.com/kubernetes/kubernetes/pull/50028), [@julia-stripe](https://github.com/julia-stripe))

* The garbage collector now supports CustomResourceDefinitions and APIServices. ([#65918](https://github.com/kubernetes/kubernetes/pull/65918), [@nikhita](https://github.com/nikhita))
* Fix a bug that preempting a pod may block forever. ([#65987](https://github.com/kubernetes/kubernetes/pull/65987), [@Random-Liu](https://github.com/Random-Liu))

* Reload systemd config files before starting kubelet. ([#65702](https://github.com/kubernetes/kubernetes/pull/65702), [@mborsz](https://github.com/mborsz))
* Fix a bug that preempting a pod may block forever. ([#65987](https://github.com/kubernetes/kubernetes/pull/65987), [@Random-Liu](https://github.com/Random-Liu))

improvements made in alternate versions of the program, if they
receive widespread use, become available for other developers to
incorporate.  Many developers of free software are heartened and
encouraged by the resulting cooperation.  However, in the case of
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The GNU General Public License permits making a modified version and
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distribute the Library is void, and will automatically terminate your
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  9. You are not required to accept this License, since you have not
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 * possibly run in another thread.
 *
 * <p>{@code UncheckedExecutionException} is intended as an alternative to {@code
 * ExecutionException} when the exception thrown by a task is an unchecked exception. However, it
 * may also wrap a checked exception in some cases.
 *
 * <p>When wrapping an {@code Error} from another thread, prefer {@link ExecutionError}. When
 * wrapping a checked exception, prefer {@code ExecutionException}.
 *

   * containers with a known order other than insertion order must override this method.
   *
   * <p>Note: This default implementation is overkill (but valid) for an unordered container. An
   * equally valid implementation for an unordered container is to throw an exception. The chosen
   * implementation, however, has the advantage of working for insertion-ordered containers, as

 - Fix: support removal of nodes backed by deleted non VMSS instances on Azure ([#91184](https://github.com/kubernetes/kubernetes/pull/91184), [@bpineau](https://github.com/bpineau)) [SIG Cloud Provider]
 - Fixed a 1.18 regression in wait.Forever that skips the backoff period on the first repeat ([#90476](https://github.com/kubernetes/kubernetes/pull/90476), [@zhan849](https://github.com/zhan849)) [SIG API Machinery]