and Java’s <code>volatile</code> variables.
</p>

<h3 id="finalizer">Finalizers</h3>

<p>
The <a href="/pkg/runtime/"><code>runtime</code></a> package provides
a <code>SetFinalizer</code> function that adds a finalizer to be called when
a particular object is no longer reachable by the program.

- Only declare Job as finished after removing all Pod finalizers to avoid orphan Pods ([#119163](https://github.com/kubernetes/kubernetes/pull/119163), [@alculquicondor](https://github.com/alculquicondor)) [SIG Apps and Testing]

- Fixed a bug where `Services` using finalizers may hold onto `ClusterIP` and/or `NodePort` allocated resources for longer than expected if the finalizer is removed using the status subresource. ([#120623](https://github.com/kubernetes/kubernetes/pull/120623), [@aojea](https://github.com/aojea))

* Fixed controller manager crash by making it tolerant to discovery errors.([#49767](https://github.com/kubernetes/kubernetes/pull/49767), [@deads2k](https://github.com/deads2k))

* The OwnerReferencesPermissionEnforcement admission plugin now requires `update` permission on the `finalizers` subresource of the referenced owner in order to set `blockOwnerDeletion` on an owner reference. ([#49133](https://github.com/kubernetes/kubernetes/pull/49133), [@deads2k](https://github.com/deads2k))

- Fix job tracking with finalizers for more than 500 pods, ensuring all finalizers are removed before counting the Pod. ([#104666](https://github.com/kubernetes/kubernetes/pull/104666), [@alculquicondor](https://github.com/alculquicondor))

DELETE request of a replication controller or a replicaset becomes asynchronous by default. The object will continue to exist in the key-value store for some time. The API server will set its metadata.deletionTimestamp, add the "orphan" finalizer to its metadata.finalizers. The object will be deleted from the key-value store after the garbage collector orphans its dependents. Please refer to this [user-guide](http://kubernetes.io/docs/user-guide/garbage-collector/) for more information regarding the garbage...

- Fixes a bug where Services using finalizers may hold onto ClusterIP and/or NodePort allocated resources for longer than expected if the finalizer is removed using the status subresource ([#120654](https://github.com/kubernetes/kubernetes/pull/120654), [@aojea](https://github.com/aojea)) [SIG Testing]

* Fixes potential deadlock when deleting CustomResourceDefinition for custom resources with finalizers ([#60542](https://github.com/kubernetes/kubernetes/pull/60542), [@liggitt](https://github.com/liggitt))

* Fix for [failure to delete federation controllers with finalizers](https://github.com/kubernetes/kubernetes/issues/43828). ([#44084](https://github.com/kubernetes/kubernetes/pull/44084), [@nikhiljindal](https://github.com/nikhiljindal))