John Howard <******@****.***> 1719946130 -0700

	for _, path := range paths {
		if !file.Exists(path) {
			log.Infof("file watcher skipping watch on non-existent path: %v", path)
			continue
		}
		if err := watcher.Add(path); err != nil {
			if closeErr := watcher.Close(); closeErr != nil {
				err = fmt.Errorf("%s: %w", closeErr.Error(), err)
			}
			return nil, err
		}
	}

	return &Watcher{
		watcher: watcher,
		Events:  fileModified,

	if !chained {
		if len(cniConfName) == 0 {
			cniConfName = "YYY-istio-cni.conf"
		}
		return filepath.Join(mountedCNINetDir, cniConfName), nil
	}

	watcher, err := util.CreateFileWatcher(mountedCNINetDir)
	if err != nil {
		return "", err
	}
	defer watcher.Close()

	for len(cniConfName) == 0 {
		cniConfName, err = getDefaultCNINetwork(mountedCNINetDir)
		if err == nil {
			break
		}

	watcher, err := util.CreateFileWatcher(targets...)
	if err != nil {
		return err
	}
	defer func() {
		setNotReady(in.isReady)
		watcher.Close()
	}()

	// Before we process whether any file events have been triggered, we must check that the file is correct
	// at this moment, and if not, yield. This is to catch other CNIs which might have mutated the file between

#### CRD Watcher

For watches against custom types (CRDs), we want to gracefully handle missing CRDs. Naively starting informers against the missing types would result in errors and blocking startup. Instead, we introduce a "CRD Watcher" component that watches the CRDs in the cluster to determine if they are available or not.

	if !cfg.Enabled {
		return nil, nil
	}
	cli, err := clientv3.New(cfg.Config)
	if err != nil {
		return nil, err
	}
	cli.KV = namespace.NewKV(cli.KV, cfg.PathPrefix)
	cli.Watcher = namespace.NewWatcher(cli.Watcher, cfg.PathPrefix)
	cli.Lease = namespace.NewLease(cli.Lease, cfg.PathPrefix)
	return cli, nil
}

func parseEndpoints(endpoints string) ([]string, bool, error) {

					t.Fatalf("expected %s, got %s", expectedFilepath, result)
				}
				// Successful test case
				return
			}

			// Handle chained CNI plugin cases
			// Call with goroutine to test fsnotify watcher
			parent, cancel := context.WithCancel(context.Background())
			defer cancel()
			resultChan, errChan := make(chan string, 1), make(chan error, 1)

func (sys *IAMSys) periodicRoutines(ctx context.Context, baseInterval time.Duration) {
	// Watch for IAM config changes for iamStorageWatcher.
	watcher, isWatcher := sys.store.IAMStorageAPI.(iamStorageWatcher)
	if isWatcher {
		go func() {
			ch := watcher.watch(ctx, iamConfigPrefix)
			for event := range ch {
				if err := sys.loadWatchedEvent(ctx, event); err != nil {
					// we simply log errors

    private final EventBus bus;
    private final List<StringCatcher> catchers;

    Registrator(EventBus bus, List<StringCatcher> catchers) {
      this.bus = bus;
      this.catchers = catchers;
    }

    @Override
    public void run() {
      StringCatcher catcher = new StringCatcher();
      bus.register(catcher);
      catchers.add(catcher);
    }
  }

  /**
   * A collector for DeadEvents.

* etcd3: watcher logging error ([#32831](https://github.com/kubernetes/kubernetes/pull/32831), [@hongchaodeng](https://github.com/hongchaodeng))
* etcd: watcher centralize error handling ([#32907](https://github.com/kubernetes/kubernetes/pull/32907), [@hongchaodeng](https://github.com/hongchaodeng))