Check for shutdown in TryBackoffAndWait

pkg/scheduler/factory/factory.go

@@ -1493,7 +1493,7 @@ func (c *configFactory) MakeDefaultErrorFunc(backoff *util.PodBackoff, podQueue
 			// to run on a node, scheduler takes the pod into account when running
 			// predicates for the node.
 			if !util.PodPriorityEnabled() {
-				if !backoff.TryBackoffAndWait(podID) {
+				if !backoff.TryBackoffAndWait(podID, c.StopEverything) {
 					klog.Warningf("Request for pod %v already in flight, abandoning", podID)
 					return
 				}

pkg/scheduler/util/backoff_utils.go

@@ -143,7 +143,7 @@ func (p *PodBackoff) BackoffPod(podID ktypes.NamespacedName) time.Duration {
 }
 
 // TryBackoffAndWait tries to acquire the backoff lock
-func (p *PodBackoff) TryBackoffAndWait(podID ktypes.NamespacedName) bool {
+func (p *PodBackoff) TryBackoffAndWait(podID ktypes.NamespacedName, stop <-chan struct{}) bool {
 	p.lock.Lock()
 	entry := p.getEntry(podID)
 
@@ -154,8 +154,12 @@ func (p *PodBackoff) TryBackoffAndWait(podID ktypes.NamespacedName) bool {
 	defer entry.unlock()
 	duration := entry.getBackoff(p.maxDuration)
 	p.lock.Unlock()
-	time.Sleep(duration)
-	return true
+	select {
+	case <-time.After(duration):
+		return true
+	case <-stop:
+		return false
+	}
 }
 
 // Gc execute garbage collection on the pod back-off.

pkg/scheduler/util/backoff_utils_test.go

@@ -111,3 +111,28 @@ func TestClearPodBackoff(t *testing.T) {
 		t.Errorf("Expected backoff time for pod %s of %s, got %s", podID, expectBoTime, boTime)
 	}
 }
+
+func TestTryBackoffAndWait(t *testing.T) {
+	clock := fakeClock{}
+	backoff := CreatePodBackoffWithClock(1*time.Second, 60*time.Second, &clock)
+
+	stopCh := make(chan struct{})
+	podID := ktypes.NamespacedName{Namespace: "ns", Name: "pod"}
+	if !backoff.TryBackoffAndWait(podID, stopCh) {
+		t.Error("Expected TryBackoffAndWait success for new pod, got failure.")
+	}
+
+	be := backoff.getEntry(podID)
+	if !be.tryLock() {
+		t.Error("Failed to acquire lock for backoffentry")
+	}
+
+	if backoff.TryBackoffAndWait(podID, stopCh) {
+		t.Error("Expected TryBackoffAndWait failure with lock acquired, got success.")
+	}
+
+	close(stopCh)
+	if backoff.TryBackoffAndWait(podID, stopCh) {
+		t.Error("Expected TryBackoffAndWait failure with closed stopCh, got success.")
+	}
+}