ORA-15271: failgroup string is a quorum failgroup
Cause: The specified failgroup was a quorum failgroup.
Action: Retry the operation with the quorum attribute for the failgroup.
ORA-15271错误消息指出，Failgroup字符串不是一个共识组，这意味着Oracle数据库无法形成共识组，也就是说无法获得多个参与者的同意使更改提交到内存中。