adstpall.sh: Database connection could not be established. Either the database is down or the APPS c

EBS R12.X 如题：adstpall.sh: Database connection could not be established. Either the database is down or the APPS credentials supplied are wrong.

可能更改了系统内核参数文件造成这些问题，可以杀掉进程重新运行或者如下：

./adstpall.sh apps/apps -secureapps

autocfg.sh 运行自动配制

别忘了关闭维护模式

或者因SYSTEM密码问题造成的，在数据层更改密码

1、 alter user system identified by manager;

2、alter user system account unlock;

3、然后重启数据库

4、应用层运行autocfg.sh并且成功。