- Added new option to the `InterPodAffinity` scheduler plugin to ignore existing
  pods` preferred inter-pod affinities if the incoming pod has no preferred inter-pod
  affinities. This option can be used as an optimization for higher scheduling throughput
  (at the cost of an occasional pod being scheduled non-optimally/violating existing
  pods preferred inter-pod affinities). To enable this scheduler option, set the

* servicecontroller: Fix node selection logic on initial LB creation ([#45773](https://github.com/kubernetes/kubernetes/pull/45773), [@justinsb](https://github.com/justinsb))
* Fix iSCSI iSER mounting. ([#47281](https://github.com/kubernetes/kubernetes/pull/47281), [@mtanino](https://github.com/mtanino))

  - A server-side apply request that changes an object which has duplicate items in a keyed list, and modifies the duplicated item removes the duplicates and replaces them with the single item contained in the server-side apply request. ([#121575](https://github.com/kubernetes/kubernetes/pull/121575), [@apelisse](https://github.com/apelisse))