3441410 - SUM fails in phase START_SHDI_FIRST with error DBSQL_CONNECTION_NO_METADATA

• SUM fails in phase MAIN_SHDRUN/START_SHDI_FIRST! with below error in SAPUpConsole.log
  

  Severe error(s) occurred in phase MAIN_SHDRUN/START_SHDI_FIRST!

  Last error code set:
  Shadow instance couldn't be started, check 'STARTSFI.LOG' and 'DEVTRACE.LOG': RFC system SLM nr 07 function 'UPG_IS_SHADOW_SYSTEM'
  RFC failed with code 3 key DBSQL_CONNECTION_NO_METADATA:
  Error DBSQL_CONNECTION_NO_METADATA occured. P1=Exception
  23DbSqlExcInvalidMetadata occurred. P2=99 P3=R/3*DDFTX

• In STARTSFI.LOG, below error can be found
  
  2EETQ360 RFC of "UPG_IS_SHADOW_SYSTEM" failed:
  2EETQ361 code/exception  : 3
  2EETQ362 key             : DBSQL_CONNECTION_NO_METADATA
  2EETQ399 Error DBSQL_CONNECTION_NO_METADATA occured. P1=Exception
  2EETQ399X23DbSqlExcInvalidMetadata occurred. P2=99 P3=R/3*DDFTX
  
  
• In developer trace (dev_w*), below error can be found juxtaposing above error
  
  B  read_con_info_ssfs(): profile parameter auth/shadow_upgrade is set
  C  lib_dbsl 753 04/16/2020 12:36:00
  C  dbsybslib.dll patch info
  C    SAP patchlevel  0
  C    SAP patchno  700
  C    Last SYBASE DBSL patchlevel 0
  C    Last SYBASE DBSL patchno         700
  C    Last SYBASE DBSL patchcomment SAP Support Package Stack Kernel 7.53 Patch Level 700 (2957666)
  C  WARNING: -1 in function SQLConnectWithRetry (SQLConnectWithRetry) [line 6500]
  C  (30011) [01S00] [SAP][ASE ODBC Driver]Invalid port number
  C  Connection 0 failed using DRIVER={Adaptive Server Enterprise};server=(local);port=;uid=SAPSR3;db=;pwd=xxxxxxxxx;TextSize=2147483647;CRC=0;FetchArraySize=1000;ReleaseLocksOnCursorClose=1;DynamicPrepare=1;QuotedIdentifier=1;UseCursor=2;homogeneousbatch=1;charset=utf8;EncryptPassword=1;EnableLOBLocator=0;app=R3D002 07 [1]comm rd ODBC;logintimeout=30;ProtocolCapture=cap_w2_comm_rd;supresstdscontroltokens=1;SuppressRowFormat=1;SuppressParamFormat=1;

• Software Update Manager(SUM)
• SAP Adaptive Server Enterprise (ASE) 16.0 for Business Suite

SSFS, SecStore, 30011, START_SHDI_FIRST, START_SHDI_FIRST!, DEFAULT_DB_CON_ENV  , KBA , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , Problem