嘗試啓動em管理器
[oracle@linux5 ~]$ emctl start dbconsole
TZ set to Asia/Chungking
Oracle Enterprise Manager 10g DatabaseControl Release 10.2.0.5.0
Copyright (c) 1996, 2010 OracleCorporation. All rights reserved.
https://linux5:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 10gDatabase Control.............................................................................................failed.
------------------------------------------------------------------
Logs are generated in directory/u01/app/oracle/product/10.2.1/db_1/linux5_test/sysman/log
啓動失敗
查看狀態
[oracle@linux5 ~]$ emctl status dbconsole
TZ set to Asia/Chungking
Oracle Enterprise Manager 10g DatabaseControl Release 10.2.0.5.0
Copyright (c) 1996, 2010 OracleCorporation. All rights reserved.
https://linux5:1158/em/console/aboutApplication
Oracle Enterprise Manager 10g is notrunning.
------------------------------------------------------------------
Logs are generated in directory/u01/app/oracle/product/10.2.1/db_1/linux5_test/sysman/log
但是查看進程，有dbconsole相關進程
[oracle@linux5 ~]$ ps -ef | grep dbconsole
oracle 6626 1 0 01:55 pts/1 00:00:01/u01/app/oracle/product/10.2.1/db_1/perl/bin/perl /u01/app/oracle/product/10.2.1/db_1/bin/emwd.pldbconsole /u01/app/oracle/product/10.2.1/db_1/linux5_test/sysman/log/emdb.nohup
從網上查找相關信息，看到有建議說要重裝em
步驟如下：
先刪除EM
1 刪除如下表和視圖或角色,這些都和EM相關的,如果不刪除，重新安裝EM時會提示這些用戶或角色已存在，從而停止安裝。
SQL> DROP publicsynonym SETEMVIEWUSERCONTEXT;
SQL> DROP PUBLICSYNONYM MGMT_TARGET_BLACKOUTS;
SQL> drop roleMGMT_USER;
SQL> DROP USERMGMT_VIEW CASCADE;
SQL> DROP USERSYSMAN CASCADE;
2 刪除EM
emca -deconfig dbcontrol db -repos drop
3 然後重建
emca -config dbcontrol db -reposcreate
INFO: >>>>>>>>>>>The Database Control URL is https://linux5:1158/em<<<<<<<<<<<
Enterprise Manager configuration completedsuccessfully
FINISHED EMCA at Sep 29, 2015 11:01:37 AM
重建後查看em狀態，依然沒有啓動成功
[oracle@linux5 ~]$ emctl start dbconsole
TZ set to Asia/Chungking
Oracle Enterprise Manager 10g DatabaseControl Release 10.2.0.5.0
Copyright (c) 1996, 2010 OracleCorporation. All rights reserved.
https://linux5:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 10gDatabase Control ........................... started.
------------------------------------------------------------------
Logs are generated in directory/u01/app/oracle/product/10.2.1/db_1/linux5_test/sysman/log
[oracle@linux5 ~]$ emctl status dbconsole
TZ set to Asia/Chungking
Oracle Enterprise Manager 10g DatabaseControl Release 10.2.0.5.0
Copyright (c) 1996, 2010 OracleCorporation. All rights reserved.
https://linux5:1158/em/console/aboutApplication
EM Daemon is not running.
------------------------------------------------------------------
Logs are generated in directory/u01/app/oracle/product/10.2.1/db_1/linux5_test/sysman/log
查看日誌中內容
Emdctl.trc中內容
2015-09-30 09:30:30 Thread-4135220928WARN http: snmehl_connect: connectfailed
to(linux5:1830): Connection refused (error = 111)
從mos中查到10.2.0.4以及10.2.0.5版本em會出現問題，需要提前安裝patch p8350262
安裝步驟
[oracle@linux5 sw]$ emctl stop dbconsole
TZ set to Asia/Chungking
Oracle Enterprise Manager 10g DatabaseControl Release 10.2.0.5.0
Copyright (c) 1996, 2010 OracleCorporation. All rights reserved.
https://linux5:1158/em/console/aboutApplication
Stopping Oracle Enterprise Manager 10gDatabase Control ...
... Stopped.
[oracle@linux5 sw]$ ps -ef | grep dbconsole
oracle 7821 1759 0 15:43 pts/1 00:00:00 grep dbconsole
[oracle@linux5 sw]$ ls
10201_database_linux_x86_64.cpio 8350262 database p8350262_10205_Generic.zip
[oracle@linux5 sw]$ cd 8350262/
[oracle@linux5 8350262]$ opatch apply
運行完後啓動em成功
[oracle@linux5 8350262]$ emctl statusdbconsole
TZ set to Asia/Chungking
Oracle Enterprise Manager 10g DatabaseControl Release 10.2.0.5.0
Copyright (c) 1996, 2010 OracleCorporation. All rights reserved.
https://linux5:1158/em/console/aboutApplication
Oracle Enterprise Manager 10g is running.
------------------------------------------------------------------
Logs are generated in directory/u01/app/oracle/product/10.2.1/db_1/linux5_test/sysman/log