- `rest_client_transport_cache_entries` is a gauge metric
  with the number of existing entries in the internal cache
  
  - `rest_client_transport_create_calls_total` is a counter
  that increments each time a new transport is created, storing
  the result of the operation needed to generate it: hit, miss
  or uncacheable. ([#117295](https://github.com/kubernetes/kubernetes/pull/117295), [@aojea](https://github.com/aojea))

### SIG Cluster Lifecycle

SIG Cluster Lifecycle focused on improving kubeadm’s user experience by including a set of new commands related to maintaining the kubeadm configuration file, the API version of which has now has been incremented to `v1alpha2`. These commands can handle the migration of the configuration to a newer version, printing the default configuration, and listing and pulling the required container images for bootstrapping a cluster.

- Fixed issue with incremental id generation for `loadbalancer` and `endpoint` in `kubeproxy` mock test framework. ([#120723](https://github.com/kubernetes/kubernetes/pull/120723), [@princepereira](https://github.com/princepereira))

- New plugin_evaluation_total is added to the scheduler.This metric counts how many times the specific plugin affects the scheduling result. The metric does not get incremented when the plugin has nothing to do with an incoming Pod. ([#115082](https://github.com/kubernetes/kubernetes/pull/115082), [@sanposhiho](https://github.com/sanposhiho))

    * a. kubectl get pod test-pod -o custom-columns=CONTAINER:.spec.containers[0:3].name
    * b. kubectl get pod test-pod -o custom-columns=CONTAINER:.spec.containers[-2:].name
* scheduler: use incremental scheduling cycle in PriorityQueue to put all in-flight unschedulable pods back to active queue if we received move request ([#73309](https://github.com/kubernetes/kubernetes/pull/73309), [@cofyc](https://github.com/cofyc))

* add goroutine to move unschedulable pods to activeq if they are not retried for more than 1 minute ([#72558](https://github.com/kubernetes/kubernetes/pull/72558), [@denkensk](https://github.com/denkensk))
* scheduler: use incremental scheduling cycle in PriorityQueue to put all in-flight unschedulable pods back to active queue if we received move request ([#73309](https://github.com/kubernetes/kubernetes/pull/73309), [@cofyc](https://github.com/cofyc))

  previous releases. When this happens, a `LifecycleHTTPFallback` event is recorded
  in the namespace of the pod and a `kubelet_lifecycle_handler_http_fallbacks_total`
  metric in the kubelet is incremented. Cluster administrators can opt out of the
  expanded lifecycle handler capabilities by setting
  `--feature-gates=ConsistentHTTPGetHandlers=false` in `kubelet`.'

## Bug Fixes and Other Changes

*   Java: Support for loading models exported using the SavedModel API (courtesy
    @EronWright).
*   Go: Added support for incremental graph execution.
*   Fix a bug in the WALS solver when single-threaded.
*   Added support for integer sparse feature values in
    `tf.contrib.layers.sparse_column_with_keys`.