-137：服务器正在运行或者存在其他进程正在操作同一个库

场景一：使用dmrman执行backup备份数据库操作时，提示报错：[-137]:服务器正在运行或者存在其他进程正在操作同一个库

报错原因：使用dmrman备份数据库时，需要确保数据库在脱机状态，也就是数据库服务必须处于shutdown状态，必须停掉数据库服务后才能开展备份。

参考过程命令：

[dmdba@localhost bin]$ ps -ef | grep dmse
dmdba       1544       1  5 14:56 ?        00:00:02 /dm/dmdbms/bin/dmserver path=/dm/dmdbms/data/DAMENG/dm.ini -noconsole
dmdba       6763    6724  0 14:57 pts/0    00:00:00 grep --color=auto dmse
[dmdba@localhost bin]$ ps -ef | grep dm.ini
dmdba       1544       1  4 14:56 ?        00:00:02 /dm/dmdbms/bin/dmserver path=/dm/dmdbms/data/DAMENG/dm.ini -noconsole
dmdba       6765    6724  0 14:57 pts/0    00:00:00 grep --color=auto dm.ini
[dmdba@localhost bin]$ ./dmrman 
dmrman V8
RMAN> backup database '/dm/dmdbms/data/DAMENG/dm.ini' backupset '/dm/dmdbms/data/DAMENG/bak/fullbak' compressed level 2 task thread 4 parallel 4;
backup database '/dm/dmdbms/data/DAMENG/dm.ini' backupset '/dm/dmdbms/data/DAMENG/bak/fullbak' compressed level 2 task thread 4 parallel 4;
[-137]:服务器正在运行或者存在其他进程正在操作同一个库
RMAN> exit
time used: 0.822(ms)
[dmdba@localhost bin]$ ./DmServiceDMSERVER stop
Stopping DmServiceDMSERVER:                                [ OK ]
[dmdba@localhost bin]$ ./dmrman 
dmrman V8
RMAN> backup database '/dm/dmdbms/data/DAMENG/dm.ini' backupset '/dm/dmdbms/data/DAMENG/bak/fullbak' compressed level 2 task thread 4 parallel 4;
backup database '/dm/dmdbms/data/DAMENG/dm.ini' backupset '/dm/dmdbms/data/DAMENG/bak/fullbak' compressed level 2 task thread 4 parallel 4;
Database mode = 0, oguid = 0
Normal of FAST
Normal of DEFAULT
Normal of RECYCLE
Normal of KEEP
Normal of ROLL
EP[0]'s cur_lsn[153245], file_lsn[153245]

Processing backupset /dm/dmdbms/data/DAMENG/bak/fullbak
[Percent:100.00%][Speed:0.00M/s][Cost:00:02:01][Remaining:00:00:00]                                 
backup successfully!
time used: 00:02:02.565
RMAN>