2928128 - Long running "IMPORT_PROPER" phase during SPAM/SAINT import

During SPAM/SAINT import, the phase "IMPORT_PROPER" is long running and can see below warnings/errors:

SLOG:

WARNING:       (This warning is harmless if no further warnings follow.)
WARNING: System GXQ. Warning.        YYYYMMDDHHMMSS :
WARNING:       Background job RDDIMPDP could not be started or terminated abnormally.
      Please check that the R/3 system is running.
      Please check the system. Use transactions SM21, SM37, SM50.
-----------------------------------------------------------------------------------------

Job log overview for job:    RDDIMPDP / XXXXXXXX

 Date       Time     Message text

 DD.MM.YYYY HH:MM:SS Job started
 DD.MM.YYYY HH:MM:SS Step 001 started (program RDDIMPDP, variant , user ID DDIC)
 DD.MM.YYYY HH:MM:SSProgram RDDIMPDP is running in client 000
 DD.MM.YYYY HH:MM:SS Header C: Unknown function, no action
 DD.MM.YYYY HH:MM:SS Job finished

SAP Netweaver 7.4

tp version,  tp Version 380.27.36, IMPORT_PROPER, hanging, no error, action log , KBA , BC-UPG-OCS , Online Corr. Support (Tools:Supp.-Pack., Addon Install/Upgr) , Problem