3605481 - HANA upgrade fails, python.crashdump generated, hdblcm.log indicates error Cannot create SecureStore

During an SAP HANA database upgrade, hdblcm fails with 

INFO: Summary of critical errors
ERR :   Update of SAP HANA Database components failed.
ERR :     Update of SAP HANA Database failed
INFO:       Upgrade failed
INFO:         error upgrading
INFO:           Cannot create SecureStore
INFO:             Found value 'cryptography/ssfs_key_file_path' = '$(DIR_GLOBAL)/hdb/security/ssfs' in layer 'Default'
INFO:             Switching to user id 1001 and group id 79.
INFO:             Starting external program /usr/sap/<sid>/HDB<xx>/exe/hdbnsutil
INFO:               Command line is: /usr/sap/<sid>/HDB<xx>/exe/hdbnsutil -createSecureStore
INFO:               Output line 1: Unable to load configuration file nameserver.ini
INFO:               Program terminated with exit code 1
INFO:             Switching back to root user.
INFO:             /usr/sap/<sid>/HDB<xx>/exe/hdbnsutil call failed [rc = 1]

SAP HANA Platform Edition

config,Configuration::ConfigurationHandlerSPI::reconfigure  , KBA , HAN-LM-UPG-DB , Upgrade of HANA Database , Problem