- kubeadm: promoted feature gate `EtcdLearnerMode` to GA. Learner mode in etcd deployed by kubeadm is now locked to enabled by default. ([#126374](https://github.com/kubernetes/kubernetes/pull/126374), [@pacoxu](https://github.com/pacoxu)) [SIG Cluster Lifecycle]

    `NullPointerException` crashes in `Deflater`.

 *  Fix: Don't crash after a web socket fails its connection upgrade. We incorrectly released
    the web socket's connections back to the pool before their resources were cleaned up.

 *  Fix: Don't infinite loop when a received web socket message has self-terminating compressed
    data.

 *  Fix: Don't fail the call when the response code is ‘HTTP 102 Processing’ or ‘HTTP 103 Early

- Removed "endpoint-controller" and "workload-leader-election" FlowSchemas from the default APF configuration.
  

- Fix a bug in the IPVS proxier where virtual servers are not cleaned up even though the corresponding Service object was deleted. ([#80942](https://github.com/kubernetes/kubernetes/pull/80942), [@gongguan](https://github.com/gongguan))

* Use separate client for leader election in scheduler to avoid starving leader election by regular scheduler operations. ([#53793](https://github.com/kubernetes/kubernetes/pull/53793), [@wojtek-t](https://github.com/wojtek-t))

                            }
                        }
                    }
                } finally {
                    // Ensure ThreadLocal is always cleaned up, even if context.close() fails
                    contextLocal.remove();
                }
            }
        }
    }

* Updated priority of mirror pod according to PriorityClassName. ([#58485](https://github.com/kubernetes/kubernetes/pull/58485), [@k82cn](https://github.com/k82cn))

* kube-scheduler: restores default leader election behavior. Setting the `--leader-elect`  command line parameter to `true` ([#60524](https://github.com/kubernetes/kubernetes/pull/60524), [@dims](https://github.com/dims))

* fix: detach azure disk issue using dangling error ([#81266](https://github.com/kubernetes/kubernetes/pull/81266), [@andyzhangx](https://github.com/andyzhangx))
* Fix a bug in the IPVS proxier where virtual servers are not cleaned up even though the corresponding Service object was deleted. ([#80942](https://github.com/kubernetes/kubernetes/pull/80942), [@gongguan](https://github.com/gongguan))

     * need to be cleaned up internally.
     */
    final @Nullable ReferenceQueue<K> keyReferenceQueue;

    /**
     * The value reference queue contains value references whose values have been garbage collected,
     * and which need to be cleaned up internally.
     */
    final @Nullable ReferenceQueue<V> valueReferenceQueue;

    /**

- Added Coordinated Leader Election as Alpha under the `CoordinatedLeaderElection` feature gate. With the feature enabled, the control plane can use LeaseCandidate objects (coordination.k8s.io/v1alpha1 API group) to participate in a leader election and let the kube-apiserver select the best instance according to some strategy. ([#124012](https://github.com/kubernetes/kubernetes/pull/124012),...