case isSysErrInvalidArg(err):
			st, _ := Lstat(filePath)
			if st != nil && st.IsDir() {
				// Linux returns InvalidArg for directory O_DIRECT
				// we need to keep this fallback code to return correct
				// errors upwards.
				return nil, dmTime, errFileNotFound
			}
			return nil, dmTime, errUnsupportedDisk
		}
		return nil, dmTime, err
	}
	defer f.Close()

  - `kube-apiserver` now only aggregates openapi schemas from `/openapi/v2` endpoints of aggregated API servers. The fallback to aggregate from `/swagger.json` has been removed. Ensure aggregated API servers provide schema information via `/openapi/v2` (available since v1.10). ([#73441](https://github.com/kubernetes/kubernetes/pull/73441), [@roycaihw](https://github.com/roycaihw))...

            }
            result.put(key, value);
          }
        } catch (UnsupportedLoadingOperationException e) {
          // loadAll not implemented, fallback to load
          for (K key : keysToLoad) {
            misses--; // get will count this miss
            result.put(key, get(key, defaultLoader));
          }
        }
      }

- Kubeadm: support automatic retry after failing to pull image ([#86899](https://github.com/kubernetes/kubernetes/pull/86899), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]
- Kubeadm: upgrade supports fallback to the nearest known etcd version if an unknown k8s version is passed ([#88373](https://github.com/kubernetes/kubernetes/pull/88373), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

run inside a pod using a kubeconfig file now use the namespace specified in the kubeconfig file, instead of using the pod namespace. If no kubeconfig file is used, or the kubeconfig does not specify a namespace, the pod namespace is still used as a fallback. ([#44570](https://github.com/kubernetes/kubernetes/pull/44570), [@liggitt](https://github.com/liggitt))

    * Fixed `kubectl cluster-info` dump to support multi-container pod. ([#44088](https://github.com/kubernetes/kubernetes/pull/44088),...

* Fix scheduler crashes when Prioritize Map function returns error. ([#69135](https://github.com/kubernetes/kubernetes/pull/69135), [@DylanBLE](https://github.com/DylanBLE))
* Add fallbacks to ARM API when getting empty node IP from Azure IMDS ([#69077](https://github.com/kubernetes/kubernetes/pull/69077), [@feiskyer](https://github.com/feiskyer))

### Other notable changes

* Add fallbacks to ARM API when getting empty node IP from Azure IMDS ([#69077](https://github.com/kubernetes/kubernetes/pull/69077), [@feiskyer](https://github.com/feiskyer))

- The fallback behavior of the Downward API's `resourceFieldRef` field was updated to account for pod-level resources: if container-level limits were not set, pod-level limits were now used before falling back to node allocatable resources. ([#132605](https://...

- Fallback from OpenAPI V3 to V2 when the OpenAPI V3 document is invalid or incomplete. ([#117980](https://github.com/kubernetes/kubernetes/pull/117980), [@seans3](https://github.com/seans3)) [SIG CLI]

- Faster mount detection for linux kernel 5.10+ using openat2 speeding up pod churn rates. On Kernel versions less 5.10, it will fallback to using the original way of detecting mount points i.e by parsing /proc/mounts. ([#109217](https://github.com/kubernetes/kubernetes/pull/109217), [@manugupt1](https://github.com/manugupt1))