- Fix: ignore not a VMSS error for VMAS nodes in EnsureBackendPoolDeleted. (#105404, @ialidzhikov) [SIG Cloud Provider]
- Fix: ignore the case when updating Azure tags (#104687, @nilo19) [SIG Cloud Provider]
- Revert PR #102925 which introduced unexpected scheduling behavior based on balanced resource allocation (#105239, @damemi) [SIG Scheduling]

[kubernetes-server-linux-s390x.tar.gz](https://dl.k8s.io/v1.6.0/kubernetes-server-linux-s390x.tar.gz) | `e15de8896bd84a9b74756adc1a2e20c6912a65f6ff0a3f3dfabc8b463e31d19b`

## WARNING: etcd backup strongly recommended

Before updating to 1.6, you are strongly recommended to back up your etcd data.
Please consult the installation procedure you are using (kargo, kops, kube-up,
kube-aws, kubeadm etc) for specific advice.

     * and which need to be cleaned up internally.
     */
    final @Nullable ReferenceQueue<V> valueReferenceQueue;

    /**
     * The recency queue is used to record which entries were accessed for updating the access
     * list's ordering. It is drained as a batch operation when either the DRAIN_THRESHOLD is
     * crossed or a write occurs on the segment.
     */
    final Queue<ReferenceEntry<K, V>> recencyQueue;

* Fix AWS NLB security group updates where valid security group ports were incorrectly removed ([#68422](https://github.com/kubernetes/kubernetes/pull/68422), [@kellycampbell](https://github.com/kellycampbell))
    * when updating a service or when node changes occur.
* Fix scheduling starvation of pods in cluster with large number of unschedulable pods. ([#72619](https://github.com/kubernetes/kubernetes/pull/72619), [@everpeace](https://github.com/everpeace))

* Re-enable nodeipam controller for external clouds.  ([#63049](https://github.com/kubernetes/kubernetes/pull/63049), [@andrewsykim](https://github.com/andrewsykim))
* kubelet: fix hangs in updating Node status after network interruptions/changes between the kubelet and API server ([#63492](https://github.com/kubernetes/kubernetes/pull/63492), [@liggitt](https://github.com/liggitt))

  
  Action required for custom scheduler plugin developers:
  Plugins **have to** implement a QueueingHint for Pod/Update event if the rejection from them could be resolved by updating unscheduled Pods themselves.
  Example: suppose you develop a custom plugin that denies Pods that have a `schedulable=false` label. 

- Fix problem in updating VolumeAttached in node status ([#112304](https://github.com/kubernetes/kubernetes/pull/112304), [@xing-yang](https://github.com/xing-yang)) [SIG Apps]

- Fix the VMSS name and resource group name when updating Azure VMSS for LoadBalancer backendPools ([#89337](https://github.com/kubernetes/kubernetes/pull/89337), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]

- kube-apiserver: Fixes an issue updating the default ServiceCIDR API object and creating dual-stack Service API objects when `--service-cluster-ip-range` flag passed to kube-apiserver is changed from single-stack to dual-stack. ([#131263](https://github.com/kubernetes/kubernetes/pull/131263),...

- Fix problem in updating VolumeAttached in node status ([#112305](https://github.com/kubernetes/kubernetes/pull/112305), [@xing-yang](https://github.com/xing-yang)) [SIG Apps]