3349913 - IBM i : SAP instance down due to port 4800 in use issue

SAP instance shuts down immediately after it starts.

• The dispatcher trace (dev_disp) shows the gateway died.
  
  

  *** ERROR => gateway (pid 1234) died [dpGateway.c  51]
  *** DP_FATAL_ERROR => Gateway died with status 2 - I better exit now

  *** DISPATCHER EMERGENCY SHUTDOWN ***

• The RFC Gateway trace file (dev_rd) shows port 4800 is in use.
  
  ***LOG Q0I=> NiIBindSocket: bind (67: Address already in use) [/bas/753_REL/src/base/ni/nixxi.cpp 3903]
  *** ERROR => NiIBindSocket: SiBind failed for hdl 25/sock 12
      (SI_EPORT_INUSE/67; I4; ST; 0.0.0.0:4800) [nixxi.cpp    3903]

  *****************************************************************************
  *
  *  LOCATION    SAP-Gateway on host <hostname> / sapgw00
  *  ERROR       service '0.0.0.0:4800' in use
  *
  *  RELEASE     753
  *  COMPONENT   NI (network interface)
  *  VERSION     40
  *  RC          -4
  *  MODULE      /bas/753_REL/src/base/ni/nixxi.cpp
  *  LINE        3903
  *  DETAIL      NiIBindSocket
  *  SYSTEM CALL bind
  *  ERRNO       67
  *  ERRNO TEXT  Address already in use
  *  COUNTER     1
  *
  *****************************************************************************

  *** ERROR => GwInitService: GwListen(sapgw00s) failed (NIESERV_USED) [gwxxrd.c     10080]
  ***LOG S10=> GwInitReader, GwInitServiceSSL () [gwxxrd.c     2439]

• SAP system on IBM i server

SI_EPORT_INUSE, 4800, port, in use, NIESERV_USED , KBA , BC-OP-AS4 , IBM AS/400 , Problem