3585534 - SAPup process is terminated without proper error message, the message "WARNING: Main log shrunk from..." is found at end of file SAPup.log or SAPup_NEW.log

The SAPup process is terminated without any detailed error message while a system is being updated in SAP SUM(Software Update Manager).

A message in the following pattern is found at end of the log file SAPup.log or SAPup_NEW.log.

*********

WARNING: Main log shrunk from 1810 to 1728   << the numbers here could be various.

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The situation keeps the same after retrying in SUM.

SAP ABAP System

Main log shrunk, SUM, SAPup, terminated, NFS, share , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem