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JDBC/thin Application Fails to Connect with ORA-01033 after Dataguard Switchover (Doc ID 2129131.1)

Last updated on MARCH 01, 2021

Applies to:

JDBC - Version and later
Information in this document applies to any platform.


A JDBC/thin application connecting to a Dataguard configuration uses the following connect string:




 The issue is triggered by the Dataguard switchover.  During this process, the first database, which was the primary and the second database which was the standby will swap roles.

After the switchover the second database is now the primary and is in OPEN READ WRITE mode.  The first database is now the standby and is in MOUNT mode.


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