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

Symptom

In scenarios like:

  • A SAP ABAP system acting as 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 it 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>

 

  • A SAP Web dispatcher trying to connect to a backend system

   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]

  This error message usually means that the client host (ICM or Web Dispatcher) requests to the Operating System a connection with the remote host and cannot receive the confirmation from OS level.


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Environment

SAP NetWeaver

Product

SAP NetWeaver all versions

Keywords

NIECONN_REFUSED, NI_CONN_WAIT, waiting for connection, non-buffered, (10035: WSAEWOULDBLOCK: Resource temporarily unavailable) , KBA , BC-CST-IC , Internet Communication Manager , BC-CST-WDP , Web Dispatcher , BC-NET , Network Infrastructure , Problem

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