2011年安装Oracle 10.2.0.4 和10.2.0.5 版本时，在配置OEM的时候会报错。 忽略这个错误后，DB 可以成功创建或者升级。MOS 上关于
Database Configuration Assistant (DBCA) and Database Upgrade Assistant (DBUA) will report the following error in the console:
Could not complete the Enterprise Manager configuration.
Enterprise manager configuration failed due to the following error –
Error starting Database Control
Enterprise Manager Configuration Assistant (EMCA) will write errors similar to those below to the emca.log file:
CONFIG: Securing Database Control completed successfully .
Jan 2, 2011 7:22:47 PM oracle.sysman.emcp.ParamsManager getParam
CONFIG: No value was set for the parameter ORACLE_HOSTNAME.
Jan 2, 2011 7:22:47 PM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) ...
Jan 2, 2011 7:22:47 PM oracle.sysman.emcp.util.PlatformInterface addEnvVarToList
CONFIG: Value for env var ''ORACLE_HOSTNAME'' is '''', discarding the same
CONFIG: Returning env array from cache
Jan 2, 2011 7:22:47 PM oracle.sysman.emcp.util.PlatformInterface executeCommand
CONFIG: Starting execution: /myhost/bin/emctl start dbconsole
Jan 2, 2011 7:27:26 PM oracle.sysman.emcp.util.PlatformInterface executeCommand
CONFIG: Exit value of 1
Jan 2, 2011 7:27:26 PM oracle.sysman.emcp.util.PlatformInterface executeCommand
CONFIG: Oracle Enterprise Manager 10g Database Control Release 10.2.0.4.0
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
https://myhost:5501/em/console/aboutApplication
Starting Oracle Enterprise Manager 10g Database Control
............................................................................................. failed.
------------------------------------------------------------------
Logs are generated in directory /myhost/sysman/log
Jan 2, 2011 7:27:26 PM oracle.sysman.emcp.util.PlatformInterface executeCommand
WARNING: Error executing /myhost/bin/emctl start dbconsole
Jan 2, 2011 7:27:26 PM oracle.sysman.emcp.EMConfig perform
SEVERE: Error starting Database Control
Refer to the log file at /myhost/dbua/d4/upgrade/emConfig.log for more details.
Jan 2, 2011 7:27:26 PM oracle.sysman.emcp.EMConfig perform
CONFIG: Stack Trace:
oracle.sysman.emcp.exception.EMConfigException: Error starting Database Control
at oracle.sysman.emcp.EMDBPostConfig.performUpgrade(EMDBPostConfig.java:763)
at oracle.sysman.emcp.EMDBPostConfig.invoke(EMDBPostConfig.java:232)
at oracle.sysman.emcp.EMDBPostConfig.invoke(EMDBPostConfig.java:193)
at oracle.sysman.emcp.EMConfig.perform(EMConfig.java:184)
at oracle.sysman.assistants.util.em.EMConfiguration.run(EMConfiguration.java:436)
at oracle.sysman.assistants.util.em.EMConfigStep.executeImpl(EMConfigStep.java:140)
at oracle.sysman.assistants.util.step.BasicStep.execute(BasicStep.java:210)
at oracle.sysman.assistants.util.step.BasicStep.callStep(BasicStep.java:251)
at oracle.sysman.assistants.dbma.backend.EMConfigStep.executeStepImpl(EMConfigStep.java:104)
at oracle.sysman.assistants.dbma.backend.SummarizableStep.executeImpl(SummarizableStep.java:175)
at oracle.sysman.assistants.util.step.BasicStep.execute(BasicStep.java:210)
at oracle.sysman.assistants.util.step.Step.execute(Step.java:140)
at oracle.sysman.assistants.util.step.StepContext$ModeRunner.run(StepContext.java:2488)
at java.lang.Thread.run(Thread.java:534)
The EMCA console will display output similar to the following:
aime@myhost09 db_1]$ bin/emca -config dbcontrol db -repos recreate -cluster
STARTED EMCA at Jan 11, 2011 4:11:01 PM
EM Configuration Assistant, Version 10.2.0.1.0 Production
Copyright (c) 2003, 2005, Oracle. All rights reserved.
Enter the following information:
Database unique name: catest
Database Control is already configured for the database catest
You have chosen to configure Database Control for managing the database catest
This will remove the existing configuration and the default settings and perform a fresh configuration
Do you wish to continue? [yes(Y)/no(N)]: Y
Listener port number: 1521
Cluster name: mycluster
Password for SYS user:
Password for DBSNMP user:
Password for SYSMAN user:
Email address for notifications (optional):
Outgoing Mail (SMTP) server for notifications (optional):
........
Jan 11, 2011 4:18:05 PM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Securing Database Control (this may take a while) ...
Jan 11, 2011 4:19:31 PM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) ...
Jan 11, 2011 4:28:38 PM oracle.sysman.emcp.EMConfig perform
SEVERE: Error starting Database Control
Refer to the log file at /myhost/oracle/product/10.2.0/db_1/cfgtoollogs/emca/catest/emca_2011-01-11_
04-11-01-PM.log for more details.
Could not complete the configuration. Refer to the log file at /myhost/oracle/product/10.2.0/db_
1/cfgtoollogs/emca/catest/emca_2011-01-11_04-11-01-PM.log for more details.
does not require any database downtime
如果是已经报错了，，解决步骤如下：
For Single Instance：
2. force stop the Database Control (dbconsole) process using the killDBConsole script bundled with the patch. Note that the dbconsole process cannot be stopped using the emctl stop dbconsole command, as EMCTL is unable to connect to the process.
3. Re-secure Database Control with the following command:
4. Re-start Database Control with the following command:
For RAC Instance：
2. force stop the Database Control (dbconsole) process by executing the killDBConsole script bundled with the patch on each node in the cluster
在所有节点执行
3. Re-secure Database Control on the first cluster node with the following command:
4. Re-secure Database Control on the remaining cluster nodes with the following command. Note that the -reset switch is not included with this command:
