* version bump for gci to milestone 53 ([#27210](https://github.com/kubernetes/kubernetes/pull/27210), [@adityakali](https://github.com/adityakali))
* kubectl apply: retry applying a patch if a version conflict error is encountered ([#26557](https://github.com/kubernetes/kubernetes/pull/26557), [@AdoHe](https://github.com/AdoHe))

        *  Don't break metric storage when duplicate pod metrics encountered causing hpa to fail
* kube-apiserver: Fixed a regression accepting patch requests > 1MB ([#84963](https://github.com/kubernetes/kubernetes/pull/84963), [@liggitt](https://github.com/liggitt))

## Changelog since v1.15.11

## Changes by Kind

### Bug or Regression

- Client-go: resolves an issue with informers falling back to full list requests when timeouts are encountered, rather than re-establishing a watch. ([#89978](https://github.com/kubernetes/kubernetes/pull/89978), [@liggitt](https://github.com/liggitt)) [SIG API Machinery and Testing]

				objInfo.TargetReplicationStatus(tgt.ARN) == replication.Failed ||
				ri.OpType == replication.ExistingObjectReplicationType {
				// if metadata is not updated for some reason after replication, such as
				// 503 encountered while updating metadata - make sure to set ReplicationStatus
				// as Completed.
				//
				// Note: Replication Stats would have been updated despite metadata update failure.
				rinfo.ReplicationAction = rAction

- Adds alpha metrics `apiserver_peer_proxy_errors_total` and `apiserver_peer_discovery_sync_errors_total` to apiserver to track errors encountered in peer proxying and peer discovery ([#137065](https://github.com/kubernetes/kubernetes/pull/137065), [@richabanker](https://github.com/richabanker)) [SIG API Machinery]

* kube-apiserver: fixed a bug that could cause a goroutine leak if the apiserver encountered an encoding error serving a watch to a websocket watcher ([#84693](https://github.com/kubernetes/kubernetes/pull/84693), [@tedyu](https://github.com/tedyu))

- Resolves non-deterministic behavior of the garbage collection controller when ownerReferences with incorrect data are encountered. Events with a reason of `OwnerRefInvalidNamespace` are recorded when namespace mismatches between child and owner objects are detected. The [kubectl-check-ownerreferences](https://github.com/kubernetes-sigs/kubectl-check-ownerreferences) tool can...

- Fixes an issue where default RBAC policy could fail to reconcile on API server startup if an error was encountered ([#101954](https://github.com/kubernetes/kubernetes/pull/101954), [@voutcn](https://github.com/voutcn)) [SIG Auth]

<code>break</code> or <code>continue</code> statement.
</p>

<pre class="ebnf">
LabeledStmt = Label ":" Statement .
Label       = identifier .
</pre>

<pre>
Error: log.Panic("error encountered")
</pre>


<h3 id="Expression_statements">Expression statements</h3>

<p>
With the exception of specific built-in functions,
function and method <a href="#Calls">calls</a> and

- Fixed a regression with the `ServiceAccountNodeAudienceRestriction` feature where `azureFile` volumes encountered 'failed to get service account token attributes' errors. ([#129993](https://github.com/kubernetes/kubernetes/pull/129993), [@aramase](https://github.com/aramase)) [SIG Auth and Testing]