- Implemented API streaming for the `watch-cache`
  
  When `sendInitialEvents` `ListOption` is set together with `watch=true`, it begins the watch stream with synthetic init events followed by a synthetic "Bookmark" after which the server continues streaming events. ([#110960](https://github.com/kubernetes/kubernetes/pull/110960), [@p0lyn0mial](https://github.com/p0lyn0mial))

* Fixed an issue ([#47800](https://github.com/kubernetes/kubernetes/pull/47800)) where `kubectl logs -f` failed with `unexpected stream type ""`. ([#50381](https://github.com/kubernetes/kubernetes/pull/50381), [@sczizzo](https://github.com/sczizzo))

- The scheduler skips the `PodTopologySpread` Filter plugin if no spread constraints.
  It will affect some metrics values related to the `PodTopologySpread` Filter plugin. ([#117683](https://github.com/kubernetes/kubernetes/pull/117683), [@utam0k](https://github.com/utam0k))

- Added options for configuring `nf_conntrack_udp_timeout`, and `nf_conntrack_udp_timeout_stream` variables of netfilter conntrack subsystem. ([#120808](https://github.com/kubernetes/kubernetes/pull/120808), [@aroradaman](https://github.com/aroradaman))

- Added a method `StreamWithContext` to `remotecommand.Executor` to support cancelable SPDY executor stream. ([#103177](https://github.com/kubernetes/kubernetes/pull/103177), [@arkbriar](https://github.com/arkbriar))