Channels act as first-in-first-out queues.
For example, if one goroutine sends values on a channel
and a second goroutine receives them, the values are
received in the order sent.
</p>

<h2 id="Properties_of_types_and_values">Properties of types and values</h2>

<h3 id="Underlying_types">Underlying types</h3>

<p>

- The Conformance test "validates that there is no conflict between pods with same hostPort but different hostIP and protocol" now validates the connectivity to each hostPort, in addition to the functionality. ([#96627](https://github.com/kubernetes/kubernetes/pull/96627), [@aojea](https://github.com/aojea)) [SIG Scheduling and Testing]...

can now store only `null` when created using the protobuf content-type or stored in etcd using protobuf serialization (the default in 1.6).
JSON API clients should tolerate `null` values for such fields, and treat `null` and `[]` as equivalent in meaning unless specifically documented otherwise for a particular field. ([#44593](https://github.com/kubernetes/kubernetes/pull/44593))

  The `flowcontrol.apiserver.k8s.io/v1beta3` APIs are deprecated and will no longer be served in v1.32. All existing objects are available via the `v1` APIs. Transition clients and manifests to use...

  * Passing multiple values separated by a comma in a single --from-literal flag is no longer supported. Please use multiple --from-literal flags to provide multiple values.

Throwables$State PROCESSING_OTHER_CODE; public static final Throwables$State PROCESSING_TEST_FRAMEWORK_CODE; public static final Throwables$State PROCESSING_REFLECTION_CODE; public static final Throwables$State DONE; public static Throwables$State[] values(); public static Throwables$State valueOf(String); private void Throwables$State(String, int); protected abstract Throwables$State processLine(String); public final Throwables$State processStackTraceEle(StackTraceElement); static void <clinit>();...

* kubeadm: fix wrong default value for the "upgrade node --certificate-renewal" flag. ([#83528](https://github.com/kubernetes/kubernetes/pull/83528), [@neolit123](https://github.com/neolit123))
* IP validates if a string is a valid IP address ([#83104](https://github.com/kubernetes/kubernetes/pull/83104), [@zouyee](https://github.com/zouyee))

### Testing

- e2e storage tests now run faster and are easier to read ([#72434](https://github.com/kubernetes/kubernetes/pull/72434), [@pohly](https://github.com/pohly))

* Add Post-bind extension point to the scheduling framework ([#77567](https://github.com/kubernetes/kubernetes/pull/77567), [@wgliang](https://github.com/wgliang))

    * Add support for enumerations in *path operation* parameters. New documentation: [Path Parameters: Predefined values](https://fastapi.tiangolo.com/tutorial/path-params/#predefined-values).