{"record":{"id":"f227cedc98eda0fd","repo":"XTLS/Xray-core","slug":"udp-requires-hysteria-udp-transport","errorCode":null,"errorMessage":"udp requires hysteria udp transport","messagePattern":"udp requires hysteria udp transport","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"proxy/hysteria/client.go","lineNumber":127,"sourceCode":"\t\t\tif !ok {\n\t\t\t\treturn errors.New(msg)\n\t\t\t}\n\t\t\treturn buf.Copy(buf.NewReader(conn), link.Writer, buf.UpdateActivity(timer))\n\t\t}\n\n\t\tresponseDoneAndCloseWriter := task.OnSuccess(responseDone, task.Close(link.Writer))\n\t\tif err := task.Run(ctx, requestDone, responseDoneAndCloseWriter); err != nil {\n\t\t\treturn errors.New(\"connection ends\").Base(err)\n\t\t}\n\n\t\treturn nil\n\t}\n\n\tif target.Network == net.Network_UDP {\n\t\tiConn := stat.TryUnwrapStatsConn(conn)\n\t\t_, ok := iConn.(*hysteria.InterConn)\n\t\tif !ok {\n\t\t\treturn errors.New(\"udp requires hysteria udp transport\")\n\t\t}\n\n\t\trequestDone := func() error {\n\t\t\tdefer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)\n\n\t\t\twriter := &UDPWriter{\n\t\t\t\twriter: conn,\n\t\t\t\taddr:   target.NetAddr(),\n\t\t\t}\n\n\t\t\tif err := buf.Copy(link.Reader, writer, buf.UpdateActivity(timer)); err != nil {\n\t\t\t\treturn errors.New(\"failed to transport all UDP request\").Base(err)\n\t\t\t}\n\n\t\t\treturn nil\n\t\t}\n\n\t\tresponseDone := func() error {","sourceCodeStart":109,"sourceCodeEnd":145,"githubUrl":"https://github.com/XTLS/Xray-core/blob/7d214f8b094f75322fa3990f8aadad1c912f24f5/proxy/hysteria/client.go#L109-L145","documentation":"Error \"udp requires hysteria udp transport\" thrown in XTLS/Xray-core.","triggerScenarios":"Thrown at proxy/hysteria/client.go:127 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"7d214f8b094f75322fa3990f8aadad1c912f24f5","analyzedAt":"2026-08-15T14:26:24.325Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}