- Fixed a scheduler panic due to internal cache inconsistency ([#71063](https://github.com/kubernetes/kubernetes/pull/71063), [@Huang-Wei](https://github.com/Huang-Wei))

- Fixed inconsistency in the calculation of number of nodes that have an image, which affect the scoring in the `ImageLocality` plugin. ([#116938](https://github.com/kubernetes/kubernetes/pull/116938), [@olderTaoist](https://github.com/olderTaoist))

* [GCE] Filter out spammy audit logs from cluster autoscaler. ([#70696](https://github.com/kubernetes/kubernetes/pull/70696), [@loburm](https://github.com/loburm))
* Fix a scheduler panic due to internal cache inconsistency ([#71063](https://github.com/kubernetes/kubernetes/pull/71063), [@Huang-Wei](https://github.com/Huang-Wei))

* fix azure disk attach/detach failed forever issue ([#71377](https://github.com/kubernetes/kubernetes/pull/71377), [@andyzhangx](https://github.com/andyzhangx))
* Fix a scheduler panic due to internal cache inconsistency ([#71063](https://github.com/kubernetes/kubernetes/pull/71063), [@Huang-Wei](https://github.com/Huang-Wei))

### Feature

- Fixed component status calling etcd health endpoint over http which exposed kubernetes to the risk of complete watch starvation and is inconsistent with other etcd probing done by `kube-apiserver`. ([#118460](https://github.com/kubernetes/kubernetes/pull/118460), [@serathius](https://github.com/serathius))

* [prototype] Volume snapshots

  * You can now create a volume snapshot by calling the Kubernetes API.

  * Note that the prototype does not support quiescing before snapshot, so snapshots might be inconsistent.

  * In the prototype phase, this feature is external to the core Kubernetes. It's available at https://github.com/kubernetes-incubator/external-storage/tree/master/snapshot.

### Cluster Federation

### Bug or Regression

- Fix component status calling etcd health endpoint over http which exposed kubernetes to the risk of complete watch starvation and is inconsistent with other etcd probing done by kube-apiserver. ([#118683](https://github.com/kubernetes/kubernetes/pull/118683), [@serathius](https://github.com/serathius)) [SIG API Machinery]

- The `export` query parameter (inconsistently supported by API resources and deprecated in v1.14) is fully removed.  Requests setting this query parameter will now receive a 400 status response. ([#98312](https://github.com/kubernetes/kubernetes/pull/98312), [@deads2k](https://github.com/deads2k))...

- The API server now detects and fails on startup if there are conflicting issuers between JWT authenticators and service account configurations. Previously, such configurations would run but could be inconsistently effective depending on the credential. ([#123561](https://github.com/kubernetes/kubernetes/pull/123561), [@enj](https://github.com/enj))