Oracle Solution for Error ora-16138

ORA-16138: end of log stream not received from primary

What triggered the Error:

The standby system has not received notification that the primary system log stream has been terminated. A graceful switchover is not possible.

What should we do to fix it:

Verify that the primary log stream has been terminated. Ensure that the standby has applied all necessary redo from the primary system and, if appropriate, reissue the graceful switchover command.