文档解释
ORA-31413: change set string is currently being advanced
Cause: An advance operation is in progress for this change set and we only allow one at a time.
Action: Since the change set is currently being advanced, the best action is to wait for it to finish advancing. Only one caller at a time can advance the change set. Check for the cause of long running advance operations.
ORA-31413: change set string错误表明当前正在执行某种类型的更改集，这-但是内部发现它无法继续前进。
官方解释
ORA-31413 发生当Oracle数据库内部发现更改集无法继续执行，并断言这类错误。
常见案例
一般处理方法及步骤
1.确定发生更改集的原因并尝试解决导致它的问题。
2.检查日志以了解更改集执行期间发生的任何问题。
3.尝试尝试恢复数据库时出现的同一更改集，以便可以回滚位于当前更改集之前的更改。
4.在更改集锁定的时刻将任务关闭，以便可以识别更改集，并决定最佳的选择以解除其锁定。
