ORA-16052

Error: ORA-16052: Problem with fetching gap sequence, media recovery cancelled.

Causa: A gap sequence is detected on the standby database while it was trying to perform managed standby recovery. The fetching of the gap sequence fails. The failures are logged in the alert log on the primary database.

Acción: Check the alert log on primary and standby database. Take appropriate action to make the gap sequence available again. Managed standby recovery on the standby database cannot proceed further until the standby database is able to get the gap sequence redo log files.