修改机器名后 EM dbconsole启不起来。

参考网上提供的几种方法，除了用命令重建EM console,其他都不行。

具体如下:（也可以直接用命令emca -config dbcontrol db -repos recreate）

第一步： 重建EM console

$ emca -deconfig dbcontrol db -repos drop

STARTED EMCA at Feb 22, 2011 2:20:28 PM

EM Configuration Assistant, Version 10.2.0.1.0 Production

Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Enter the following information:

Database SID: ####

Listener port number: ####

Password for SYS user:

Password for SYSMAN user:

Do you wish to continue? [yes(Y)/no(N)]: yes

Feb 22, 2011 2:20:59 PM oracle.sysman.emcp.EMConfig perform

INFO: This operation is being logged at ####/cfgtoollogs/emca/szprod02/emca_2011-02-22_02-20-28-PM.log.

Feb 22, 2011 2:21:00 PM oracle.sysman.emcp.util.DBControlUtil stopOMS

INFO: Stopping Database Control (this may take a while) ...

Feb 22, 2011 2:21:02 PM oracle.sysman.emcp.EMReposConfig dropRepository

INFO: Dropping the EM repository (this may take a while) ...

Feb 22, 2011 2:22:03 PM oracle.sysman.emcp.EMReposConfig invoke

INFO: Repository successfully dropped

Enterprise Manager configuration completed successfully

FINISHED EMCA at Feb 22, 2011 2:22:03 PM

$emca -config dbcontrol db -repos create   (此命令好象得在oracle_home下面执行，否则有可能报错)

STARTED EMCA at Feb 22, 2011 2:25:08 PM

EM Configuration Assistant, Version 10.2.0.1.0 Production

Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Enter the following information:

Database SID: ####

Listener port number: ###

Password for SYS user:

Password for DBSNMP user:

Password for SYSMAN user:

Email address for notifications (optional):

Outgoing Mail (SMTP) server for notifications (optional):

-----------------------------------------------------------------

You have specified the following settings

Database ORACLE_HOME ................####

Database hostname ................ ####

Listener port number ................ ####

Database SID ................ ####

Email address for notifications ............... ####

Outgoing Mail (SMTP) server for notifications ............... ####

-----------------------------------------------------------------

Do you wish to continue? [yes(Y)/no(N)]: yes

Feb 22, 2011 2:26:02 PM oracle.sysman.emcp.EMConfig perform

INFO: This operation is being logged at ####/cfgtoollogs/emca/szprod02/emca_2011-02-22_02-25-08-PM.log.

Feb 22, 2011 2:26:04 PM oracle.sysman.emcp.EMReposConfig createRepository

INFO: Creating the EM repository (this may take a while) ...

Feb 22, 2011 2:27:56 PM oracle.sysman.emcp.EMReposConfig invoke

INFO: Repository successfully created

Feb 22, 2011 2:28:05 PM oracle.sysman.emcp.util.DBControlUtil secureDBConsole

INFO: Securing Database Control (this may take a while) ...

Feb 22, 2011 2:29:10 PM oracle.sysman.emcp.util.DBControlUtil secureDBConsole

INFO: Database Control secured successfully.

Feb 22, 2011 2:29:10 PM oracle.sysman.emcp.util.DBControlUtil startOMS

INFO: Starting Database Control (this may take a while) ...

Feb 22, 2011 2:34:00 PM oracle.sysman.emcp.util.PlatformInterface executeCommand

WARNING: Error executing /u01/oracle/product/10.2.0.1/bin/emctl start dbconsole

Feb 22, 2011 2:34:00 PM oracle.sysman.emcp.EMConfig perform

SEVERE: Error starting Database Control

Refer to the log file at #### /cfgtoollogs/emca/szprod02/emca_2011-02-22_02-25-08-PM.log for more details.

Could not complete the configuration. Refer to the log file at /u01/oracle/product/10.2.0.1/cfgtoollogs/emca/szprod02/emca_2011-02-22_02-25-08-PM.log for more details.

第二步，将已存在的em, oc4j的进程kill掉，再尝试启动dbconsole, 发现报错。ERROR ssl: Open wallet failed, ret = 28750

提示可能ssl证书有问题，可以取消https.即执行emctl unsecure dbconsole, 则dbconsole以http模式开启。如果要再改用https模式可以再执行命令emctl upload 及emctl secure dbconsole.

[oracle@ehrprod persistence]$ emctl unsecure dbconsole

TZ set to Hongkong

Oracle Enterprise Manager 10g Database Control Release 10.2.0.4.0

Copyright (c) 1996, 2007 Oracle Corporation.  All rights reserved.

https://ehrprod:1158/em/console/aboutApplication

Configuring DBConsole for HTTP...   Done.

DBCONSOLE already stopped...   Done.

Agent is already stopped...   Done.

Unsecuring dbconsole...   Started.

DBConsole is now unsecured...  Done.

Unsecuring dbconsole...  Sucessful.

第三步，再次尝试启dbconsole时，报错 WARN  http: snmehl_connect: connect failed to (ehrprod:1158): Connection refused (error = 111)

解决办法是查找emagent的进程，kill掉，再启，最后终于OK了。

[oracle@ehrprod persistence]$ ps -ef | grep emagent

oracle   19843     1  0 14:03 pts/0    00:00:09 /u01/oracle/product/10.2.0.1/bin/emagent

oracle   29162 15448  0 17:04 pts/1    00:00:00 grep emagent

[oracle@ehrprod persistence]$ kill -9 19843