Remove recursion in waitForVolumeDetachmentInternal

pkg/volume/csi/csi_attacher.go

@@ -490,14 +490,9 @@ func (c *csiAttacher) waitForVolumeDetachmentInternal(volumeHandle, attachID str
 	if err != nil {
 		return fmt.Errorf("watch error:%v for volume %v", err, volumeHandle)
 	}
-	var watcherClosed bool
-	ch := watcher.ResultChan()
-	defer func() {
-		if !watcherClosed {
-			watcher.Stop()
-		}
-	}()
 
+	ch := watcher.ResultChan()
+	defer watcher.Stop()
 	for {
 		select {
 		case event, ok := <-ch:
@@ -521,10 +516,7 @@ func (c *csiAttacher) waitForVolumeDetachmentInternal(volumeHandle, attachID str
 				return nil
 
 			case watch.Error:
-				watcher.Stop()
-				watcherClosed = true
-				// start another cycle
-				return c.waitForVolumeDetachmentInternal(volumeHandle, attachID, timer, timeout)
+				klog.Warningf("waitForVolumeDetachmentInternal received watch error: %v", event)
 			}
 
 		case <-timer.C:

pkg/volume/csi/csi_attacher_test.go

@@ -894,11 +894,12 @@ func TestAttacherDetach(t *testing.T) {
 
 	nodeName := "test-node"
 	testCases := []struct {
-		name       string
-		volID      string
-		attachID   string
-		shouldFail bool
-		reactor    func(action core.Action) (handled bool, ret runtime.Object, err error)
+		name         string
+		volID        string
+		attachID     string
+		shouldFail   bool
+		watcherError bool
+		reactor      func(action core.Action) (handled bool, ret runtime.Object, err error)
 	}{
 		{name: "normal test", volID: "vol-001", attachID: getAttachmentName("vol-001", testDriver, nodeName)},
 		{name: "normal test 2", volID: "vol-002", attachID: getAttachmentName("vol-002", testDriver, nodeName)},
@@ -916,6 +917,19 @@ func TestAttacherDetach(t *testing.T) {
 				return false, nil, nil
 			},
 		},
+		{
+			name:         "API watch error happen",
+			volID:        "vol-005",
+			attachID:     getAttachmentName("vol-005", testDriver, nodeName),
+			shouldFail:   true,
+			watcherError: true,
+			reactor: func(action core.Action) (handled bool, ret runtime.Object, err error) {
+				if action.Matches("get", "volumeattachments") {
+					return true, makeTestAttachment(getAttachmentName("vol-005", testDriver, nodeName), nodeName, "vol-005"), nil
+				}
+				return false, nil, nil
+			},
+		},
 	}
 
 	for _, tc := range testCases {
@@ -944,7 +958,14 @@ func TestAttacherDetach(t *testing.T) {
 			if err != nil {
 				t.Errorf("test case %s failed: %v", tc.name, err)
 			}
+			watchError := tc.watcherError
+			csiAttacher.waitSleepTime = 100 * time.Millisecond
 			go func() {
+				if watchError {
+					errStatus := apierrs.NewInternalError(fmt.Errorf("we got an error")).Status()
+					fakeWatcher.Error(&errStatus)
+					return
+				}
 				fakeWatcher.Delete(attachment)
 			}()
 			err = csiAttacher.Detach(volumeName, types.NodeName(nodeName))