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2582112 - ERROR => NiBufIConnect: non-buffered connect pending after <timeout >ms

Symptom

  • In scenarios, where an SAP ABAP system is acting as a client of the connection, for example:

    The destination system is a PI system and in the SXI Monitor (transaction SXI_MONITOR) of the sender system, the following error message appears:

    HTTP Error :Receiving message 
    "ClIENT_RECEIVE_FAILED Error while receiving by HTTP (error code: 411, error text : Connect to <destination hostname>:<port nr> failed: NIECONN_REFUSED (-10)"

    <SAP:Category>XIServer </SAP:Category>
    <SAP:Code area="INTERNAL">CLIENT_RECEIVE_FAILED </SAP:Code>
    <SAP:P1>411 </SAP:P1>
    <SAP:P2>Connect to <destination hostname>:<port nr > failed: NIECONN_REFUSED (-10)</SAP:P2>
    <SAP:P3 />>(See attachment HTMLError for details)</SAP:P3>
    <SAP:P4 />
    <SAP:AdditionalText />
    <SAP:Stack>Error while receiving by HTTP (error code: 114 error text: Connect to <destination hostname>:<port nr > failed: NIECONN_REFUSED (-10)">
    <SAP:Retry>N </SAP:Retry>
    </SAP:Error>

OR

  • An SAP Web dispatcher is trying to connect to a back-end system and the following error message appears in the dev_icm or dev_webdisp trace files:

  • [Thr <nr>] NiIConnect: state of hdl <nr> NI_CONN_WAIT

    [Thr <nr>] *** ERROR => NiBufIConnect: non-buffered connect pending after 5000ms (hdl <IP address>:<port nr>) [nibuf.cpp    4524]

    [Thr <nr>] NiICloseHandle: called for hdl <nr> while waiting for connection

    [Thr <nr>] NiICloseHandle: shutdown and close hdl <nr>/sock <nr>

    [Thr <nr>] IcmIConnConnect: Connect to host: <destination hostname>:<port nr>, NIECONN_REFUSED(-10)

    [Thr <nr>] *** WARNING => Connect to <destination hostname>:<port nr> failed: NIECONN_REFUSED(-10) {00080aa9} [icxxconn.c 2356]


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Environment

  • Operating System independent
  • Database independent
  • SAP NetWeaver
  • SAP Web Application Server for SAP S/4HANA
  • ABAP Platform

Product

ABAP platform all versions ; SAP NetWeaver all versions ; SAP Web Application Server for SAP S/4HANA all versions

Keywords

NIECONN_REFUSED, NI_CONN_WAIT, waiting for connection, non-buffered, (10035: WSAEWOULDBLOCK: Resource temporarily unavailable), SXI Monitor, SXI_MONITOR, SAP Web dispatcher, ICM, client host, remote host, TCP handshake, icm/conn_timeout, external partner, port nr, Wireshark, TCP dump, netstat, niping, telnet, connection failed, connect to server o.k , KBA , BC-CST-IC , Internet Communication Manager , BC-CST-WDP , Web Dispatcher , BC-NET , Network Infrastructure , Problem

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