Update k8s dependency version to 1.21

Signed-off-by: xinyanwu409 <wxinyan@vmware>

vendor/k8s.io/client-go/tools/record/OWNERS

@@ -1,28 +1,6 @@
 # See the OWNERS docs at https://go.k8s.io/owners
 
 reviewers:
-- lavalamp
-- smarterclayton
-- wojtek-t
-- deads2k
-- derekwaynecarr
-- caesarxuchao
-- vishh
-- mikedanese
-- liggitt
-- nikhiljindal
-- erictune
-- pmorie
-- dchen1107
-- saad-ali
-- luxas
-- yifan-gu
-- mwielgus
-- timothysc
-- jsafrane
-- dims
-- krousey
-- a-robinson
-- aveshagarwal
-- resouer
-- cjcullen
+- sig-instrumentation-reviewers
+approvers:
+- sig-instrumentation-approvers

vendor/k8s.io/client-go/tools/record/event.go

@@ -155,21 +155,21 @@ func (a *EventRecorderAdapter) Eventf(regarding, _ runtime.Object, eventtype, re
 // Creates a new event broadcaster.
 func NewBroadcaster() EventBroadcaster {
 	return &eventBroadcasterImpl{
-		Broadcaster:   watch.NewBroadcaster(maxQueuedEvents, watch.DropIfChannelFull),
+		Broadcaster:   watch.NewLongQueueBroadcaster(maxQueuedEvents, watch.DropIfChannelFull),
 		sleepDuration: defaultSleepDuration,
 	}
 }
 
 func NewBroadcasterForTests(sleepDuration time.Duration) EventBroadcaster {
 	return &eventBroadcasterImpl{
-		Broadcaster:   watch.NewBroadcaster(maxQueuedEvents, watch.DropIfChannelFull),
+		Broadcaster:   watch.NewLongQueueBroadcaster(maxQueuedEvents, watch.DropIfChannelFull),
 		sleepDuration: sleepDuration,
 	}
 }
 
 func NewBroadcasterWithCorrelatorOptions(options CorrelatorOptions) EventBroadcaster {
 	return &eventBroadcasterImpl{
-		Broadcaster:   watch.NewBroadcaster(maxQueuedEvents, watch.DropIfChannelFull),
+		Broadcaster:   watch.NewLongQueueBroadcaster(maxQueuedEvents, watch.DropIfChannelFull),
 		sleepDuration: defaultSleepDuration,
 		options:       options,
 	}
@@ -323,7 +323,7 @@ type recorderImpl struct {
 	clock clock.Clock
 }
 
-func (recorder *recorderImpl) generateEvent(object runtime.Object, annotations map[string]string, timestamp metav1.Time, eventtype, reason, message string) {
+func (recorder *recorderImpl) generateEvent(object runtime.Object, annotations map[string]string, eventtype, reason, message string) {
 	ref, err := ref.GetReference(recorder.scheme, object)
 	if err != nil {
 		klog.Errorf("Could not construct reference to: '%#v' due to: '%v'. Will not report event: '%v' '%v' '%v'", object, err, eventtype, reason, message)
@@ -338,15 +338,18 @@ func (recorder *recorderImpl) generateEvent(object runtime.Object, annotations m
 	event := recorder.makeEvent(ref, annotations, eventtype, reason, message)
 	event.Source = recorder.source
 
-	go func() {
-		// NOTE: events should be a non-blocking operation
-		defer utilruntime.HandleCrash()
-		recorder.Action(watch.Added, event)
-	}()
+	// NOTE: events should be a non-blocking operation, but we also need to not
+	// put this in a goroutine, otherwise we'll race to write to a closed channel
+	// when we go to shut down this broadcaster.  Just drop events if we get overloaded,
+	// and log an error if that happens (we've configured the broadcaster to drop
+	// outgoing events anyway).
+	if sent := recorder.ActionOrDrop(watch.Added, event); !sent {
+		klog.Errorf("unable to record event: too many queued events, dropped event %#v", event)
+	}
 }
 
 func (recorder *recorderImpl) Event(object runtime.Object, eventtype, reason, message string) {
-	recorder.generateEvent(object, nil, metav1.Now(), eventtype, reason, message)
+	recorder.generateEvent(object, nil, eventtype, reason, message)
 }
 
 func (recorder *recorderImpl) Eventf(object runtime.Object, eventtype, reason, messageFmt string, args ...interface{}) {
@@ -354,7 +357,7 @@ func (recorder *recorderImpl) Eventf(object runtime.Object, eventtype, reason, m
 }
 
 func (recorder *recorderImpl) AnnotatedEventf(object runtime.Object, annotations map[string]string, eventtype, reason, messageFmt string, args ...interface{}) {
-	recorder.generateEvent(object, annotations, metav1.Now(), eventtype, reason, fmt.Sprintf(messageFmt, args...))
+	recorder.generateEvent(object, annotations, eventtype, reason, fmt.Sprintf(messageFmt, args...))
 }
 
 func (recorder *recorderImpl) makeEvent(ref *v1.ObjectReference, annotations map[string]string, eventtype, reason, message string) *v1.Event {