Log "Index scan timed out" when scan timing out during scanPipeline.Execute()

func (s *scanCoordinator) handleScanRequest(req *ScanRequest, w ScanResponseWriter,

 is IndexSnapshot, t0 time.Time) {

 waitTime := time.Now().Sub(t0)

 scanPipeline := NewScanPipeline(req, w, is, s.config.Load())

 cancelCb := NewCancelCallback(req, func(e error) {

 scanPipeline.Cancel(e)

 })

 cancelCb.Run()

 defer cancelCb.Done()

err := scanPipeline.Execute()

...

    if err != nil {

        status := fmt.Sprintf("(error = %s)", err)

        logging.LazyVerbose(func() string {

            return fmt.Sprintf("%s RESPONSE rows:%d, scanned:%d, waitTime:%v, totalTime:%v, status:%s, requestId:%s",

                req.LogPrefix, scanPipeline.RowsReturned(), scanPipeline.RowsScanned(), waitTime, scanTime, status, req.RequestId)

        })

        s.updateErrStats(req, err)

    }