XTLS/Xray-core · error

failed to transfer request payload

Error message

failed to transfer request payload

What it means

Error "failed to transfer request payload" thrown in XTLS/Xray-core.

Source

Thrown at proxy/trojan/client.go:133

		}

		// write some request payload to buffer
		if err = buf.CopyOnceTimeout(link.Reader, bodyWriter, time.Millisecond*100); err != nil && err != buf.ErrNotTimeoutReader && err != buf.ErrReadTimeout {
			return errors.New("failed to write A request payload").Base(err).AtWarning()
		}

		// Flush; bufferWriter.WriteMultiBuffer now is bufferWriter.writer.WriteMultiBuffer
		if err = bufferWriter.SetBuffered(false); err != nil {
			return errors.New("failed to flush payload").Base(err).AtWarning()
		}

		// Send header if not sent yet
		if _, err = connWriter.Write([]byte{}); err != nil {
			return err.(*errors.Error).AtWarning()
		}

		if err = buf.Copy(link.Reader, bodyWriter, buf.UpdateActivity(timer)); err != nil {
			return errors.New("failed to transfer request payload").Base(err).AtInfo()
		}

		return nil
	}

	getResponse := func() error {
		defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)

		var reader buf.Reader
		if network == net.Network_UDP {
			reader = &PacketReader{
				Reader: conn,
			}
		} else {
			reader = buf.NewReader(conn)
		}
		return buf.Copy(reader, link.Writer, buf.UpdateActivity(timer))
	}

View on GitHub (pinned to 7d214f8b09)

When it happens

Trigger: Thrown at proxy/trojan/client.go:133 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of XTLS/Xray-core@7d214f8b09 (2026-08-15). Data as JSON: /api/errors/011353479fd6ce82. Report an issue: GitHub.