* Changed default scsi controller type in vSphere Cloud Provider ([#38426](https://github.com/kubernetes/kubernetes/pull/38426), [@abrarshivani](https://github.com/abrarshivani))
* Fixes API compatibility issue with empty lists incorrectly returning a null `items` field instead of an empty array. ([#39834](https://github.com/kubernetes/kubernetes/pull/39834), [@liggitt](https://github.com/liggitt))

If you are using `response_model` with some type that doesn't include `None` but the function is returning `None`, it will now raise an internal server error, because you are returning invalid data that violates the contract in `response_model`. Before this release it would allow breaking that contract returning `None`.

For example, if you have an app like this:

```Python
from fastapi import FastAPI

   *
   * <p>When the weight of an entry is zero it will not be considered for size-based eviction
   * (though it still may be evicted by other means).
   *
   * <p><b>Important note:</b> Instead of returning this as a {@code CacheBuilder}
   * instance, this method returns {@code CacheBuilder<K1, V1>}. From this point on, either the
   * original reference or the returned reference may be used to complete configuration and build

    inappropriate.

 *  New: `HttpUrl.get(String)` is an alternative to `HttpUrl.parse(String)` that throws an exception
    when the URL is malformed instead of returning null. Use this to avoid checking for null in
    situations where the input is known to be well-formed. We've also added `MediaType.get(String)`
    which is an exception-throwing alternative to `MediaType.parse(String)`.

	return err
}

// getClusterMetaInfo gets information of the current cluster and
// returns it.
// This is not a critical function, and it is allowed
// to fail with a ten seconds timeout, returning nil.
func getClusterMetaInfo(ctx context.Context) []byte {
	objectAPI := newObjectLayerFn()
	if objectAPI == nil {
		return nil
	}

	// Add a ten seconds timeout because getting profiling data

			}
		}
	}

	modTime := opts.MTime
	if opts.MTime.IsZero() {
		modTime = UTCNow()
	}
	fvID := mustGetUUID()

	defer func() {
		// attempt a heal before returning if there are offline disks
		// for both del marker and permanent delete situations.
		for _, disk := range storageDisks {
			if disk != nil && disk.IsOnline() {
				continue
			}

              // if checkTime, we want to check *after* acquiring the lock if refresh still needs
              // to be scheduled
              return null;
            }

            // continue returning old value while loading
            ++modCount;
            LoadingValueReference<K, V> loadingValueReference =
                new LoadingValueReference<>(valueReference);

found in the _cgo_export.h generated header, after any preambles
copied from the cgo input files. Functions with multiple
return values are mapped to functions returning a struct.

Not all Go types can be mapped to C types in a useful way.
Go struct types are not supported; use a C struct type.
Go array types are not supported; use a C pointer.

* Fix incorrectly propagated ResourceVersion in ListRequests returning 0 items. ([#64150](https://github.com/kubernetes/kubernetes/pull/64150), [@wojtek-t](https://github.com/wojtek-t))

* Protobuf serialization does not distinguish between `[]` and `null`. ([#45294](https://github.com/kubernetes/kubernetes/pull/45294), [@liggitt](https://github.com/liggitt))