Oracle Error ORA-16442: ALTER SYSTEM FLUSH REDO TO STANDBY succeeded, but some redo has not been applied.

Oracle Error Message

ORA-16442: ALTER SYSTEM FLUSH REDO TO STANDBY succeeded, but some redo has not been applied.

Reason for the Error

The target standby database did not apply all received redo.

Solution

Allow the target standby database to apply all redo and then reissue the ALTER SYSTEM FLUSH REDO TO STANDBY statement.