2617596 - Tenant-DB startup fails: Incorrect configuration osgroup defined by tenant config differs from process group

After patching, updating or upgrading SAP HANA database, the startup of a Tenant database fails with the following errors in indexserver trace:

[126576]{-1}[-1/-1] 2018-05-30 15:05:29.298100 e indexserver      TREXIndexServer.cpp(04182) : Incorrect configuration osgroup defined by tenant config differs from process group!
[126576]{-1}[-1/-1] 2018-05-30 15:05:29.298147 e indexserver      TREXIndexServer.cpp(04197) : Do NOT use daemon.ini sections [indexserver] or [indexserver.c] to configure the service in mdc; instead use ALTER DATABASE ... ADD 'indexserver'.
[126576]{-1}[-1/-1] 2018-05-30 15:05:29.309777 f Service          TrexService.cpp(00548) : FATAL: initialization of service failed with exception exception  1: no.1000013  (TREXIndexServer2/TREXIndexServer.cpp:4206)
    Error invalid mdc setup while starting service
exception throw location:
 1: 0x00007f36833ed175 in TRexAPI::TREXIndexServer::startup()+0xf81 at TREXIndexServer.cpp:4206 (hdbindexserver)
 2: 0x00007f368345ce07 in nlsui_main+0xe53 at TrexService.cpp:537 (hdbindexserver)
 3: 0x00007f3648716f94 in System::mainWrapper(int, char**, char**)+0x20 at IsInMain.cpp:327 (libhdbbasis.so)
 4: 0x00007f3646731ac5 in __libc_start_main+0xf1 (libc.so.6)

You may also see the following errors in the xsengine trace:

[126578]{-1}[-1/-1] 2018-05-30 15:05:29.270146 e indexserver      TREXIndexServer.cpp(04182) : Incorrect configuration osgroup defined by tenant config differs from process group!
[126578]{-1}[-1/-1] 2018-05-30 15:05:29.270197 e indexserver      TREXIndexServer.cpp(04197) : Do NOT use daemon.ini sections [xsengine] or [xsengine.c] to configure the service in mdc; instead use ALTER DATABASE ... ADD 'xsengine'.
[126578]{-1}[-1/-1] 2018-05-30 15:05:29.284139 f Service          TrexService.cpp(00548) : FATAL: initialization of service failed with exception exception  1: no.1000013  (TREXIndexServer2/TREXIndexServer.cpp:4206)
    Error invalid mdc setup while starting service
exception throw location:
 1: 0x00007f5d049caeae in TRexAPI::TREXIndexServer::startup()+0xf8a at TREXIndexServer.cpp:4206 (hdbxsengine)
 2: 0x00007f5d04a38d87 in nlsui_main+0xe53 at TrexService.cpp:537 (hdbxsengine)
 3: 0x00007f5cca215f94 in System::mainWrapper(int, char**, char**)+0x20 at IsInMain.cpp:327 (libhdbbasis.so)
 4: 0x00007f5cc8230ac5 in __libc_start_main+0xf1 (libc.so.6)

• SAP HANA Database 1.0;
• SAP HANA Database 2.0.

osgroup, sapsys , KBA , HAN-DB , SAP HANA Database , Problem