oracle 的OracleDBConsoleorcl 服务经常不能启动，可以通过如下操作解决OracleDBConsoleorcl服务不能启动的问题。
windows下在cmd控制台输入；linux中切换到oracle用户下输入
1、重建EM资料
emca -repos recreate
Database SID: orcl
Listener port number: 1521
Password for SYS user: 密码
Password for SYSMAN user:密码
Do you wish to continue? [yes(Y)/no(N)]: y
2、配置dbcontrol
emca -config dbcontrol db
Database SID: orcl
Listener port number: 1521
Listener ORACLE_HOME [ /u01/app/oracle ]:
Password for SYS user: 密码
Password for DBSNMP user:密码
Password for SYSMAN user: 密码
Password for SYSMAN user: Email address for notifications (optional): 可以不输入
Outgoing Mail (SMTP) server for notifications (optional): 可以不输入
Do you wish to continue? [yes(Y)/no(N)]: y
在上述配置之后访问https://IP:1158/em/或其它端口号即可。
