XTLS/Xray-core · error

failed to transport all UDP response

Error message

failed to transport all UDP response

What it means

Error "failed to transport all UDP response" thrown in XTLS/Xray-core.

Source

Thrown at proxy/hysteria/client.go:154

			}

			if err := buf.Copy(link.Reader, writer, buf.UpdateActivity(timer)); err != nil {
				return errors.New("failed to transport all UDP request").Base(err)
			}

			return nil
		}

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

			reader := &UDPReader{
				reader: conn,
				df:     &Defragger{},
			}

			if err := buf.Copy(reader, link.Writer, buf.UpdateActivity(timer)); err != nil {
				return errors.New("failed to transport all UDP response").Base(err)
			}

			return nil
		}

		responseDoneAndCloseWriter := task.OnSuccess(responseDone, task.Close(link.Writer))
		if err := task.Run(ctx, requestDone, responseDoneAndCloseWriter); err != nil {
			return errors.New("connection ends").Base(err)
		}

		return nil
	}

	return nil
}

func init() {
	common.Must(common.RegisterConfig((*ClientConfig)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {

View on GitHub (pinned to 7d214f8b09)

When it happens

Trigger: Thrown at proxy/hysteria/client.go:154 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/61eda92c1e86cf44. Report an issue: GitHub.