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

• In scenarios, where an SAP ABAP system is acting as the client of a 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]

OR also

• "Connection refused by server (ICM_HTTP_CONNECTION_REFUSED)" message in transaction SM21

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

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, (ICM_HTTP_CONNECTION_REFUSED) , KBA , BC-CST-IC , Internet Communication Manager , BC-CST-WDP , Web Dispatcher , BC-NET , Formerly used for network tests , Problem