Oracle Error Message
ORA-16086: Redo data cannot be written to the standby redo log
Reason for the Error
The primary database was in MAXIMUM PROTECTION or MAXIMUM AVAILABILITY mode, but redo data could not be written to the standby redo log at the standby database(s).
Solution
Check the Remote File Server (RFS) trace file for specific errors and reconfigure the standby redo log as appropriate.