1800071 - ORA-12545 when connecting to the database in Fail Safe environments

When SAP processes try to establish a connection to a database that is clustered using Oracle Fail Safe in a Microsoft Cluster, the relevant log files (work process traces, trans.log) contain the following error:

4 ETW000  [    dbsloci.,00000]  *** ERROR => CONNECT failed with sql error '12545'                      7182  12.722395
4 ETW000  [     dev trc,00000]     set_ocica() -> SQL error code 12545                                    15  12.722410
4 ETW000  [     dev trc,00000]  -->oci_get_errmsg (con=0, rc=12545)                                       11  12.722421
4 ETW000  [     dev trc,00000]     OCIErrorGet -> SQL error code: 12545                                   13  12.722434
4 ETW000  [     dev trc,00000]     ORA-12545: Connect failed because target host or object does not exist                                                    
4 ETW000                                                                                                  17  12.722451
4 ETW000  [     dev trc,00000]  SAPUSER error or connect error 99=DBSL_ERR_DB, oerr=12545.                13  12.722464
4 ETW000  [     dev trc,00000]     DbSlConnect(con=0) -> orc=0, 99=DBSL_ERR_DB                            16  12.722480
4 ETW000  [    dblink  ,00000]  ***LOG BY2=>sql error 12545  performing CON                             9569  12.732049
4 ETW000  [    dblink  ,00000]  ***LOG BY0=>ORA-12545: Connect failed because target host or object does not exist

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

Oracle Fail Safe

Fail Safe, MSCS, 12545, cluster , KBA , BC-DB-ORA , Oracle , BC-OP-NT , Windows , Problem