OEM failed to start: ORACLE/PRODUCT/10.2.0/DBHOME_1/OC4J/J2EE/OC4J_DBCONSOLE_LOCALHOST.LOCALDOMAIN_ORCL not found.

Configure OEM Environment variables

Oracle_unqname= $ORACLE _sid

To open the OEM Web management program, you must first start database listener, and then start the Datebase control port monitor, but you encounter the following situation

Problem:
[Email protected] oc4j_dbconsole]$ emctl start dbconsole
TZ set to PRC
Oc4j Configuration issue. /U01/APP/ORACLE/PRODUCT/10.2.0/DB_1/OC4J/J2EE/OC4J_DBCONSOLE_LOCALHOST.LOCALDOMAIN_ORCL not found.

In fact, the resulting situation may be that the EM database is misconfigured or Dbcotrol is not configured properly.

Solve:
① Rebuilding EM data
[Email protected] oc4j_dbconsole]$ Emca-repos recreate
...
Enter the following information:
Database SID:ORCL
Listener Port number:1521
Password for SYS user:oracle
Password for Sysman user:oracle
wish to continue? [Yes (Y)/no (N)]: Y
...
Info:repository successfully created

② Configuration Dbcontrol
[Email protected] oc4j_dbconsole]$ emca-config Dbcontrol db
EMCA started on 2009-6-8 21:50:28
EM Configuration Assistant 10.2.0.1.0 official version
Copyright (c) 2003, 2005, Oracle. All rights reserved.

Enter the following information:
Database SID:ORCL
Listener Port number: 1521
SYS User's password: (password is not visible)
DBSNMP User's password: (password is not visible)
Sysman User's password: (password is not visible)
e-mail address of the notification (optional):
Outgoing (SMTP) server for notifications (optional):
-----------------------------------------------------------------

The following settings have been specified

Database Oracle_home .../u01/app/oracle/product/10.2.0/db_1, ....----

The database hostname ..... ...... localhost.localdomain.
Listener port number ...... ....... 1521
Database SID ..... ORCL-----
The e-mail address of the notification .....
Notification of the outgoing (SMTP) server ..... .....

-----------------------------------------------------------------
Do you want to continue? [Yes (Y)/no (N)]: Y
2009-6-8 21:50:58 Oracle.sysman.emcp.EMConfig Perform
Info: This operation is being logged to/u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/emca/orcl/emca_2009-06-08_09-50-27-pm. Log.
2009-6-8 21:50:59 oracle.sysman.emcp.DatabaseChecks Performreposchecks
Warning: ' shared_pool_size ' must be greater than or equal to + MB.
2009-6-8 21:51:13 Oracle.sysman.emcp.util.DBControlUtil startoms
Info: Starting Database Control (This operation may take some time) ...
2009-6-8 21:52:57 Oracle.sysman.emcp.EMDBPostConfig performconfiguration
Info: The Database Control was successfully started
2009-6-8 21:52:57 Oracle.sysman.emcp.EMDBPostConfig performconfiguration
Info: >>>>>>>>>>> Control URL for Http://localhost.localdomain:1158/em << <<<<<<<<<
Configuration of Enterprise Manager completed successfully
EMCA ended on 2009-6-8 21:52:57

Then go directly into the http://localhost.localdomain:1158/em/, enter the account sys and password ******, select SYSDBA permissions, you can see the web-based em normally.

ORACLE10G's EM was web-based and divided into 2 products, database control and Grid control. The Grid control needs to download a separate disc installation. When using DBCA to build the library, you can choose whether to enable Dbcontrol, if enabled, you need to create a Sysman schema in the database, to hold some of EM data, this is the EM Database (repository). Use the command-line tool EMCA to create, modify, rebuild, or delete dbcontrol configurations.

Emca-repos Create: Creating a new Database Control repository
Emca-repos drop: Delete the current database Control repository
Emca-repos recreate: Deletes the current database Control repository and re-creates a

Emca-config Dbcontrol DB: Metabase Control of the configuration database
Emca-deconfig Dbcontrol db: de-database Control

Note: (1) If more than one database exists on the server, you must set the ORACLE_SID environment variable before starting database control
(2) It is best to configure the server with a static IP address

　　

Common Command syntax:

Emca-repos Create an EM repository Emca-repos recreate rebuild an EM repository emca-repos drop delete an em repository emca-config dbcontrol DB configuration Database Dat Abase control emca-deconfig Dbcontrol DB Delete database control configuration Emca-reconfig ports reconfigure DB control and agent Port Emctl s Tart console Start the EM console service, you need to set the ORACLE_SID environment variable before use EMCTL Stop console Stop the EM console service, you need to set the ORACLE_SID environment variable before use Note: View $ The Oracle_home/install/portlist.ini file can know the port that the current Dbcontrol is using, and the default Dbcontrol HTTP port 1158,agent Port 3938. If you are reconfiguring a port, you can use the following command: Emca-reconfig ports-dbcontrol_http_port 1159 emca-reconfig ports-agent_port 3939 using command-line tools EMCT L can start/Stop console service, check service status, etc.

OEM failed to start: ORACLE/PRODUCT/10.2.0/DBHOME_1/OC4J/J2EE/OC4J_DBCONSOLE_LOCALHOST.LOCALDOMAIN_ORCL not found.