- The scheduling queue didn't notice any extenders' failures, it could miss some cluster events,
  and it could end up Pods rejected by Extenders stuck in unschedulable pod pool in 5min in the worst-case scenario.

## Changelog since v1.9.8

### Action Required

* ACTION REQUIRED: Kubernetes JSON deserializer is now case-sensitive to restore compatibility with pre-1.8 servers. If your config files contains fields with wrong case, the config files will be now invalid. ([#65298](https://github.com/kubernetes/kubernetes/pull/65298), [@nikhita](https://github.com/nikhita))

* kubeadm: fix an issue where 'config view' did not return a config in case of a 1.12 cluster ([#69969](https://github.com/kubernetes/kubernetes/pull/69969), [@neolit123](https://github.com/neolit123))

- Do not remove the "batch.kubernetes.io/job-tracking" finalizer from a Pod, in a corner
  case scenario, when the Pod is controlled by an API object which is not a batch Job

- Fixed an issue in the kubelet that showed when writeable layers and read-only layers were at different paths within the same mount.
  Kubernetes was previously detecting that the image filesystem was split, even when that was not really the case. ([#126562](https://github.com/kubernetes/kubernetes/pull/126562), [@kannon92](https://github.com/kannon92)) [SIG Node]

* Nodecontroller doesn't flip readiness on pods if kubeletVersion < 1.2.0 ([#30828](https://github.com/kubernetes/kubernetes/pull/30828), [@bprashanth](https://github.com/bprashanth))
* AWS: Handle kube-down case where the LaunchConfig is dangling ([#30816](https://github.com/kubernetes/kubernetes/pull/30816), [@zmerlynn](https://github.com/zmerlynn))

* The init-container (pod.beta.kubernetes.io/init-containers) annotations used to accept capitalized field names that could be accidentally generated by the k8s.io/kubernetes/pkg/api package. Using an upper case field name will now return an error and all users should use the versioned API types from `pkg/api/v1` when serializing from Golang.

## Action Required Before Upgrading

* Important Security-related changes before upgrading

career

// careers : 2013-10-02 Binky Moon, LLC
careers

// cars : 2014-11-13 XYZ.COM LLC
cars

// casa : 2013-11-21 Registry Services, LLC
casa

// case : 2015-09-03 Digity, LLC
case

// cash : 2014-03-06 Binky Moon, LLC
cash

// casino : 2014-12-18 Binky Moon, LLC
casino

// catering : 2013-12-05 Binky Moon, LLC
catering

- Previously, the scheduling queue didn't notice any extenders' failures, potentially resulting in missed cluster events and Pods rejected by Extenders being stuck in the unschedulable pod pool for up to 5 minutes in the worst-case scenario. Now, the scheduling queue notices extenders' failures and requeues Pods rejected by Extenders appropriately.
   ([#122022](https://github.com/kubernetes/kubernetes/pull/122022), [@sanposhiho](https://github.com/sanposhiho))

* ✏️ Fix typo in `fastapi/routing.py` . PR [#10520](https://github.com/tiangolo/fastapi/pull/10520) by [@sepsh](https://github.com/sepsh).
* 📝 Replace HTTP code returned in case of existing user error in docs for testing. PR [#4482](https://github.com/tiangolo/fastapi/pull/4482) by [@TristanMarion](https://github.com/TristanMarion).