I have an Oracle DataGuard envrionment that it has been upgraded from 12.1.0.2 to 18C recently. After the upgrade, the ODG broker gave the following error: ORA-1005: null password given; logon denied DGMGRL> show configuration; Configuration - DG_APROD Protection Mode: MaxPerformance Members: DB1 - Primary database Error: ORA-1005: null password given; logon denied DB2- Physical … Continue reading ODG broker error: ORA-1005: null password given; logon denied →