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1701375 - ORA-12154 connecting to Standby database


On the primary database's alert<SID>.log you will see the following messages:

Errors in file /oracle/<SID>/saptrace/background/<sid>_arcn_<pid>.trc:
ORA-12154: TNS:could not resolve the connect identifier specified
PING[ARC7]: Heartbeat failed to connect to standby '<STDBYSID>'. Error is


Error 12154 received logging on to the standby



  • Oracle database release independent
  • Data Guard
  • UNIX or Linux release independent


SAP NetWeaver 2004 ; SAP NetWeaver 7.0 ; SAP NetWeaver 7.1 ; SAP NetWeaver 7.2 ; SAP NetWeaver 7.3 ; SAP NetWeaver 7.4 ; SAP NetWeaver 7.5 ; SAP enhancement package 1 for SAP NetWeaver 7.0 ; SAP enhancement package 1 for SAP NetWeaver 7.3 ; SAP enhancement package 2 for SAP NetWeaver 7.0 ; SAP enhancement package 3 for SAP NetWeaver 7.0


oracle, dataguard, data guard, tns, ORA-12154, TNS-12154, standby, connectivity, connection, TNS_ADMIN, failed, resolve, tns-03505 , KBA , BC-DB-ORA , Oracle , Problem

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