ORA-16218: This database is already preparing to switch over. ORACLE 报错 故障修复 远程处理

文档解释

ORA-16218: This database is already preparing to switch over.

Cause: The database was already preparing to switch over and was not able to accomodate another prepare attempt.

Action: Cancel the current prepare attempt with the ALTER DATABASE PREPARE TO SWITCHOVER CANCEL command, then reissue the prepare request.