errCh := make(chan error, 2)
		for i := 0; i < 100; i++ {
			t.Log("iter", i)
			write := fmt.Sprint(i)
			wg := sync.WaitGroup{}
			wg.Add(2)
			go func() {
				defer wg.Done()
				if _, err := cms.Update(context.Background(), mkMap(extraCmName, write), metav1.UpdateOptions{}); err != nil {
					errCh <- err
				}
			}()
			go func() {
				defer wg.Done()

	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		return nil, fmt.Errorf("watcher create: %v", err)
	}

	fileModified, errChan := make(chan struct{}), make(chan error)
	go watchFiles(watcher, fileModified, errChan)

	for _, path := range paths {
		if !file.Exists(path) {
			log.Infof("file watcher skipping watch on non-existent path: %v", path)
			continue
		}

	if ent.Has(fsnotify.Write) || ent.Has(fsnotify.Rename) {
		// error out when ConfigFile is updated
		o.errCh <- fmt.Errorf("content of the proxy server's configuration file was updated")
		return
	}
	o.errCh <- nil
}

func (o *Options) errorHandler(err error) {
	o.errCh <- err
}

// processHostnameOverrideFlag processes hostname-override flag

			// Should detect a valid configuration and wait indefinitely for a file modification
			errChan := make(chan error)
			go func(ctx context.Context) {
				errChan <- in.sleepWatchInstall(ctx, sets.String{})
			}(ctx)

			select {
			case <-readyChan:
				assert.Equal(t, isReady.Load(), true)
			case err := <-errChan:
				if err == nil {
					t.Fatal("invalid configuration detected")
				}
				t.Fatal(err)

	}
	if ctx != context.Background() {
		errCh := make(chan error, 1)
		done := make(chan struct{})
		defer func() {
			close(done)
			if ctxErr == nil {
				ctxErr = <-errCh
			}
		}()
		go func() {
			select {
			case <-ctx.Done():
				c.SetDeadline(socksaLongTimeAgo)
				errCh <- ctx.Err()
			case <-done:
				errCh <- nil
			}
		}()
	}

	ztunnelServer := fixture.ztunServer
	errChan := make(chan error)
	go func() {
		errChan <- ztunnelServer.PodDeleted(ctx, uid)
	}()
	// read the msg to delete from ztunnel
	m, fds = readRequest(t, ztunClient)
	assert.Equal(t, len(fds), 0)
	assert.Equal(t, m.Payload.(*zdsapi.WorkloadRequest_Del).Del.Uid, uid)
	sendAck(ztunClient)

	assert.NoError(t, <-errChan)

	ztunClient.Close()

			pushingCh := make(chan struct{}, 1)
			errCh := make(chan error, 1)

			var partialPushes int32
			var fullPushes int32

			wg := sync.WaitGroup{}

			fakePush := func(req *model.PushRequest) {
				if req.Full {
					select {
					case pushingCh <- struct{}{}:
					default:
						errCh <- fmt.Errorf("multiple pushes happen simultaneously")
						return
					}

		errCh := make(chan error, batchSize)
		var wg sync.WaitGroup
		wg.Add(batchSize)
		for i := 0; i < batchSize; i++ {
			go func() {
				defer wg.Done()
				if err := fn(); err != nil {
					errCh <- err
				}
			}()
		}
		wg.Wait()
		curSuccesses := batchSize - len(errCh)
		successes += curSuccesses
		if len(errCh) > 0 {
			return successes, <-errCh
		}

			defer cancel()
			resultChan, errChan := make(chan string, 1), make(chan error, 1)
			go func(resultChan chan string, errChan chan error, ctx context.Context, cniConfName, mountedCNINetDir string, chained bool) {
				result, err := getCNIConfigFilepath(ctx, cniConfName, mountedCNINetDir, chained)
				if err != nil {
					errChan <- err
					return
				}
				resultChan <- result

	getProgressFunc func() (int64, int64)
	bytesReturned   int64

	payloadBuffer      []byte
	payloadBufferIndex int
	payloadCh          chan *bytes.Buffer

	finBytesScanned, finBytesProcessed int64

	errCh  chan []byte
	doneCh chan struct{}
}

func (writer *messageWriter) write(data []byte) bool {
	if _, err := writer.writer.Write(data); err != nil {
		return false
	}