garbage collecting other resources if a given resource cannot be listed or watched. Any objects in the unsynced resource type with owner references with `blockOwnerDeletion: true` will not be known to the garbage collector. Use of `blockOwnerDeletion` has always been best-effort and racy on startup and object creation. With this fix, it continues to be best-effort for resources that cannot be synced by the garbage collector controller. ([#125796](https://github.com/kubernetes/kubernetes/pull/125796),...

* Upgrade the default etcd server version to 3.1.12 to pick up critical etcd "mvcc "unsynced" watcher restore operation" fix. ([#60998](https://github.com/kubernetes/kubernetes/pull/60998), [@jpbetz](https://github.com/jpbetz))

  protected Table<String, Integer, Character> create(@Nullable Object... data) {
    TestTable<String, Integer, Character> table = new TestTable<>();
    Table<String, Integer, Character> synced = Synchronized.table(table, table.mutex);
    populate(synced, data);
    return synced;
  }

Due to Guava's nature as a subset of Google's internal codebase which is
automatically synced to the public GitHub repository, we are unable to merge
pull requests directly into the master branch. Instead, once a pull request is
ready for merging, we'll make the appropriate changes in the internal codebase
and, when the change is synced out, give the pull request author credit for the
commit.

Contributor License Agreement

## Changelog since v1.18.15

## Changes by Kind

### Bug or Regression

- Avoid marking node as Ready until node has synced with API servers at least once ([#99034](https://github.com/kubernetes/kubernetes/pull/99034), [@ehashman](https://github.com/ehashman)) [SIG Node]

- The EndpointSlice controller now waits for EndpointSlice and Node caches to be synced before starting. ([#94086](https://github.com/kubernetes/kubernetes/pull/94086), [@robscott](https://github.com/robscott)) [SIG Apps and Network]

* Moved qos to api.helpers. ([#44906](https://github.com/kubernetes/kubernetes/pull/44906), [@k82cn](https://github.com/k82cn))

* Fix issue with the resource quota controller causing add quota to be resynced at the wrong ([#45685](https://github.com/kubernetes/kubernetes/pull/45685), [@derekwaynecarr](https://github.com/derekwaynecarr))

- Shared informers now correctly propagate whether they are synced or not. Individual informer handlers may now check if they are synced or not (new `HasSynced` method). Library support is added to assist controllers in tracking whether their own work is completed for items in the initial list (`AsyncTracker`). ([#113985](https://github.com/kuber...

    * [prometheus-to-sd addon] Bump prometheus-to-sd to 0.3.1 to pick up security fixes, bug fixes and new features.
    * [event-exporter addon] Bump event-exporter to 0.2.3 to pick up security fixes.

### Bug or Regression

- Aggregate errors when putting vmss ([#98350](https://github.com/kubernetes/kubernetes/pull/98350), [@nilo19](https://github.com/nilo19)) [SIG Cloud Provider]
- Avoid marking node as Ready until node has synced with API servers at least once ([#97995](https://github.com/kubernetes/kubernetes/pull/97995), [@ehashman](https://github.com/ehashman)) [SIG Node]