内容简介：Oracle 11g EM无法启动
〇、错误
使用dbca安装数据库，虽然中间勾选了EM选项，却发现并没有随着安装的完成而启动，以下就是整个排错过程。
一、排错
1.1、检查hosts文件
发现hosts文件中没有x.x.x.x hostname这一行，将改行数据加入后保存文件。比如：
192.168.224.150 dbsrv.test.com dbsrv
上段代码中，第一段为本机静态地址，第二段为hostname完整形式，第三段为hostname简单形式。
1.2、检查ORACLE_UNQNAME环境变量
执行如下命令查看结果：
echo $ORACLE_UNQNAME
发现并未有返回值，说明该变量没有设置，执行：
export ORACLE_UNQNAME=orcl
其中orcl为数据库的SID。
也可以将上面的语句写入到~/.bash_profile文件中使每次登陆都自动生效。
1.3、重新配置EM
执行：
emca -config dbcontrol db -repos recreate
根据提示填入内容。
STARTED EMCA at Jun 7, 2017 8:29:08 AM
EM Configuration Assistant, Version 11.2.0.0.2 Production
Copyright (c) 2003, 2005, Oracle. All rights reserved.
Enter the following information:
Database SID: orcl
Listener port number: 1521
Listener ORACLE_HOME [ /app/oracle/product/11.2.0/dbhome_1 ]:
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 ……………. /app/oracle/product/11.2.0/dbhome_1
Local hostname ……………. dbsrv.test.org
Listener ORACLE_HOME ……………. /app/oracle/product/11.2.0/dbhome_1
Listener port number ……………. 1521
Database SID ……………. orcl
Email address for notifications ……………
Outgoing Mail (SMTP) server for notifications ……………
—————————————————————–
Do you wish to continue? [yes(Y)/no(N)]: yes
Jun 7, 2017 8:29:44 AM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /app/oracle/cfgtoollogs/emca/orcl/emca_2017_06_07_08_29_07.log.
Jun 7, 2017 8:29:46 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Dropping the EM repository (this may take a while) …
Jun 7, 2017 8:31:41 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully dropped
Jun 7, 2017 8:31:41 AM oracle.sysman.emcp.EMReposConfig createRepository
INFO: Creating the EM repository (this may take a while) …
Jun 7, 2017 8:38:16 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully created
Jun 7, 2017 8:38:19 AM oracle.sysman.emcp.EMReposConfig uploadConfigDataToRepository
INFO: Uploading configuration data to EM repository (this may take a while) …
Jun 7, 2017 8:39:34 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Uploaded configuration data successfully
Jun 7, 2017 8:39:38 AM oracle.sysman.emcp.util.DBControlUtil configureSoftwareLib
INFO: Software library configured successfully.
Jun 7, 2017 8:39:38 AM oracle.sysman.emcp.EMDBPostConfig configureSoftwareLibrary
INFO: Deploying Provisioning archives …
Jun 7, 2017 8:40:24 AM oracle.sysman.emcp.EMDBPostConfig configureSoftwareLibrary
INFO: Provisioning archives deployed successfully.
Jun 7, 2017 8:40:24 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Securing Database Control (this may take a while) …
Jun 7, 2017 8:41:42 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Database Control secured successfully.
Jun 7, 2017 8:41:42 AM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) …
Jun 7, 2017 8:42:30 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: Database Control started successfully
Jun 7, 2017 8:42:30 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: >>>>>>>>>>> The Database Control URL is https://dbsrv.test.org:1158/em <<<<<<<<<<<
Jun 7, 2017 8:42:33 AM oracle.sysman.emcp.EMDBPostConfig invoke
WARNING:
************************ WARNING ************************
Management Repository has been placed in secure mode wherein Enterprise Manager data will be encrypted. The encryption key has been placed in the file: /app/oracle/product/11.2.0/dbhome_1/dbsrv.test.org_orcl/sysman/config/emkey.ora. Please ensure this file is backed up as the encrypted data will become unusable if this file is lost.
***********************************************************
Enterprise Manager configuration completed successfully
FINISHED EMCA at Jun 7, 2017 8:42:33 AM
整个过程大概持续几分钟，安装成功后执行emctl status dbconsole查看状态：
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation. All rights reserved.
https://dbsrv.test.org:1158/em/console/aboutApplication
Oracle Enterprise Manager 11g is running.
——————————————————————
Logs are generated in directory /app/oracle/product/11.2.0/dbhome_1/dbsrv.zjsjg.org_orcl/sysman/log
在浏览器中输入https://dbsrv.test.org:1158/em进行访问。
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