对oracle10grac配置em，原本是非常简单的事，却花费了很长时间，记录下来，备忘。
首先是报如下错误：
[oracle@node1 admin]$ emca -config dbcontrol dbstarted emca at aug 17, 2014 9:06:47 amem configuration assistant, version 10.2.0.5.0 productioncopyright (c) 2003, 2009, oracle. all rights reserved.enter the following information:database sid: racdb1listener port number: 1521password for sys user: password for dbsnmp user: aug 17, 2014 9:06:57 am oracle.sysman.emcp.util.generalutil initsqlenginewarning: ora-28000: the account is lockedpassword for sysman user: aug 17, 2014 9:07:02 am oracle.sysman.emcp.util.generalutil initsqlenginewarning: ora-28000: the account is lockedemail address for notifications (optional): outgoing mail (smtp) server for notifications (optional): asm oracle_home [ /u01/app/oracle/product/11.2.0/db ]: asm sid [ +asm ]: asm port [ 1521 ]: asm user role [ sysdba ]: asm username [ sys ]: asm user password: asm user password: -----------------------------------------------------------------you have specified the following settingsdatabase oracle_home ................ /u01/app/oracle/product/11.2.0/dblocal hostname ................ node1listener port number ................ 1521database sid ................ racdb1email address for notifications ............... outgoing mail (smtp) server for notifications ............... asm oracle_home ................ /u01/app/oracle/product/11.2.0/dbasm sid ................ +asmasm port ................ 1521asm user role ................ sysdbaasm username ................ sys-----------------------------------------------------------------do you wish to continue? [yes(y)/no(n)]: yaug 17, 2014 9:12:22 am oracle.sysman.emcp.emconfig performinfo: this operation is being logged at /u01/app/oracle/product/11.2.0/db/cfgtoollogs/emca/racdb/emca_2014-08-17_09-06-47-am.log.aug 17, 2014 9:12:34 am oracle.sysman.emcp.util.dbcontrolutil securedbconsoleinfo: securing database control (this may take a while) ...aug 17, 2014 9:13:01 am oracle.sysman.emcp.util.dbcontrolutil securedbconsoleinfo: database control secured successfully.aug 17, 2014 9:13:01 am oracle.sysman.emcp.util.dbcontrolutil startomsinfo: starting database control (this may take a while) ...aug 17, 2014 9:17:40 am oracle.sysman.emcp.util.platforminterface executecommandwarning: error executing /u01/app/oracle/product/11.2.0/db/bin/emctl start dbconsole aug 17, 2014 9:17:40 am oracle.sysman.emcp.emconfig performsevere: error starting database controlrefer to the log file at /u01/app/oracle/product/11.2.0/db/cfgtoollogs/emca/racdb/emca_2014-08-17_09-06-47-am.log for more details.could not complete the configuration. refer to the log file at /u01/app/oracle/product/11.2.0/db/cfgtoollogs/emca/racdb/emca_2014-08-17_09-06-47-am.log for more details.
[root@node1 ~]# cat /u01/app/oracle/product/11.2.0/db/cfgtoollogs/emca/racdb/emca_2014-08-17_09-06-47-am.log
aug 17, 2014 9:17:40 am oracle.sysman.emcp.emconfig performconfig: stack trace: oracle.sysman.emcp.exception.emconfigexception: error starting database control at oracle.sysman.emcp.emdbpostconfig.performconfiguration(emdbpostconfig.java:649) at oracle.sysman.emcp.emdbpostconfig.invoke(emdbpostconfig.java:227) at oracle.sysman.emcp.emdbpostconfig.invoke(emdbpostconfig.java:196) at oracle.sysman.emcp.emconfig.perform(emconfig.java:184) at oracle.sysman.emcp.emconfigassistant.invokeemca(emconfigassistant.java:494) at oracle.sysman.emcp.emconfigassistant.performconfiguration(emconfigassistant.java:1161) at oracle.sysman.emcp.emconfigassistant.statusmain(emconfigassistant.java:478) at oracle.sysman.emcp.emconfigassistant.main(emconfigassistant.java:426)
网上查资料，是oracle的bug。oracle对此的解释是：
in enterprise manager database control with oracle database 10.2.0.4 and 10.2.0.5, the root certificate used to secure communications via the secure socket layer (ssl) protocol will expire on 31-dec-2010 00:00:00. the certificate expiration will cause errors if you attempt to configure database control on or after 31-dec-2010. existing database control configurations are not affected by this issue.
if you plan to configure database control with either of these oracle database releases, oracle strongly recommends that you apply patch 8350262 to your oracle home installations before you configure database control. configuration of database control is typically done when you create or upgrade oracle database, or if you run enterprise manager configuration assistant (emca) in standalone mode.
可以查看：enterprise manager database control configuration - recovering from errors due to ca expiry on oracle database 10.2.0.4 or 10.2.0.5 [video] [id 1222603.1]
解决方法：
如果是在创建实例前就已经打了这个patch的话，那之后就不会报错了。如果是在创建实例之后才打的这个patch，那么需要执行以下：
对于单实例：
1.使用opatch安装patch 8350262
2.设置oracle_home and oracle_sid 环境变量，执行 /killdbconsole.(windows 平台省略这一步)
3.re-secure database control with the following command:
/bin/emctl secure dbconsole -reset
4.re-start database control with the following command:
/bin/emctl start dbconsole
对于rac：
1.使用opatch安装patch 8350262, 在一个节点安装就ok了。
2.在所有节点执行：设置oracle_home and oracle_sid 环境变量，执行 /killdbconsole.(windows 平台省略这一步)
3.re-secure database control on the first cluster node with the following command:
/bin/emctl secure dbconsole -reset
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:
/bin/emctl secure dbconsole
5.re-start database control by executing the following command on each node in the cluster:
/bin/emctl start dbconsole
打补丁后，清除并新建em，各种报错，无奈下手工删除各种数据：connected to:oracle database 10g enterprise edition release 10.2.0.5.0 - 64bit productionwith the partitioning, real application clusters, olap, data miningand real application testing optionssql> drop public synonym setemviewusercontext;synonym dropped.sql> drop public synonym mgmt_target_blackouts;synonym dropped.sql> drop role mgmt_user;role dropped.sql> drop user mgmt_view cascade;drop user mgmt_view cascade *error at line 1:ora-01918: user 'mgmt_view' does not existsql> drop user sysman cascade;user dropped.sql> exit
之后新建em成功，[oracle@node1 ~]$ emca -config dbcontrol db -repos createstarted emca at aug 17, 2014 2:58:04 pmem configuration assistant, version 10.2.0.5.0 productioncopyright (c) 2003, 2009, oracle. all rights reserved.enter the following information:database sid: racdb1listener port number: 1521password for sys user: password for dbsnmp user: password for sysman user: email address for notifications (optional): outgoing mail (smtp) server for notifications (optional): asm oracle_home [ /u01/app/oracle/product/11.2.0/db ]: asm sid [ +asm ]: +asm1asm port [ 1521 ]: asm user role [ sysdba ]: asm username [ sys ]: asm user password: -----------------------------------------------------------------you have specified the following settingsdatabase oracle_home ................ /u01/app/oracle/product/11.2.0/dblocal hostname ................ node1listener port number ................ 1521database sid ................ racdb1email address for notifications ............... outgoing mail (smtp) server for notifications ............... asm oracle_home ................ /u01/app/oracle/product/11.2.0/dbasm sid ................ +asm1asm port ................ 1521asm user role ................ sysdbaasm username ................ sys-----------------------------------------------------------------do you wish to continue? [yes(y)/no(n)]: yaug 17, 2014 2:58:32 pm oracle.sysman.emcp.emconfig performinfo: this operation is being logged at /u01/app/oracle/product/11.2.0/db/cfgtoollogs/emca/racdb/emca_2014-08-17_02-58-04-pm.log.aug 17, 2014 2:58:34 pm oracle.sysman.emcp.emreposconfig createrepositoryinfo: creating the em repository (this may take a while) ...aug 17, 2014 3:02:14 pm oracle.sysman.emcp.emreposconfig invokeinfo: repository successfully createdaug 17, 2014 3:02:24 pm oracle.sysman.emcp.util.dbcontrolutil securedbconsoleinfo: securing database control (this may take a while) ...aug 17, 2014 3:02:50 pm oracle.sysman.emcp.util.dbcontrolutil securedbconsoleinfo: database control secured successfully.aug 17, 2014 3:02:50 pm oracle.sysman.emcp.util.dbcontrolutil startomsinfo: starting database control (this may take a while) ...aug 17, 2014 3:04:27 pm oracle.sysman.emcp.emdbpostconfig performconfigurationinfo: database control started successfullyaug 17, 2014 3:04:27 pm oracle.sysman.emcp.emdbpostconfig performconfigurationinfo: >>>>>>>>>>> the database control url is https://node1:1158/em
登陆之后，发现不是rac的em，重新配置
[oracle@node1 dbs]$ cd /u01/app/crs_home/bin[oracle@node1 bin]$ ./cemutlo -ncrs[oracle@node1 bin]$ sqlplus / as sysdbasql*plus: release 10.2.0.5.0 - production on sun aug 17 17:18:28 2014copyright (c) 1982, 2010, oracle. all rights reserved.connected to:oracle database 10g enterprise edition release 10.2.0.5.0 - 64bit productionwith the partitioning, real application clusters, olap, data miningand real application testing optionssql> show parameter namename type value------------------------------------ ----------- ------------------------------db_file_name_convert stringdb_name string racdbdb_unique_name string racdbglobal_names boolean trueinstance_name string racdb1lock_name_space stringlog_file_name_convert stringservice_names string service1, sys$admin.target_que ue.racdb.epoint.com, service2, racdb.epoint.comsql>
[oracle@node1 dbs]$ emca -config dbcontrol db -repos create -clusterstarted emca at aug 17, 2014 5:02:15 pmem configuration assistant, version 10.2.0.5.0 productioncopyright (c) 2003, 2009, oracle. all rights reserved.enter the following information:database unique name: racdbdatabase control is already configured for the database racdbyou have chosen to configure database control for managing the database racdbthis will remove the existing configuration and the default settings and perform a fresh configurationdo you wish to continue? [yes(y)/no(n)]: ylistener port number: 1521cluster name: crspassword for sys user: password for dbsnmp user: password for sysman user: email address for notifications (optional): outgoing mail (smtp) server for notifications (optional): asm oracle_home [ /u01/app/oracle/product/11.2.0/db ]: asm port [ 1521 ]: asm user role [ sysdba ]: asm username [ sys ]: asm user password: -----------------------------------------------------------------you have specified the following settingsdatabase oracle_home ................ /u01/app/oracle/product/11.2.0/dbdatabase instance hostname ................ node1listener port number ................ 1521cluster name ................ crsdatabase unique name ................ racdbemail address for notifications ............... outgoing mail (smtp) server for notifications ............... asm oracle_home ................ /u01/app/oracle/product/11.2.0/dbasm port ................ 1521asm user role ................ sysdbaasm username ................ sys-----------------------------------------------------------------do you wish to continue? [yes(y)/no(n)]: yaug 17, 2014 5:02:38 pm oracle.sysman.emcp.emconfig performinfo: this operation is being logged at /u01/app/oracle/product/11.2.0/db/cfgtoollogs/emca/racdb/emca_2014-08-17_05-02-15-pm.log.aug 17, 2014 5:02:40 pm oracle.sysman.emcp.util.dbcontrolutil stopomsinfo: stopping database control (this may take a while) ...aug 17, 2014 5:02:44 pm oracle.sysman.emcp.emreposconfig createrepositoryinfo: creating the em repository (this may take a while) ...aug 17, 2014 5:05:22 pm oracle.sysman.emcp.emreposconfig invokeinfo: repository successfully createdaug 17, 2014 5:05:27 pm oracle.sysman.emcp.emdbcconfig instantiateoc4jconfigfilesinfo: propagating /u01/app/oracle/product/11.2.0/db/oc4j/j2ee/oc4j_dbconsole_node1_racdb1 to remote nodes ...aug 17, 2014 5:05:28 pm oracle.sysman.emcp.emdbcconfig instantiateoc4jconfigfilesinfo: propagating /u01/app/oracle/product/11.2.0/db/oc4j/j2ee/oc4j_dbconsole_node2_racdb2 to remote nodes ...aug 17, 2014 5:05:28 pm oracle.sysman.emcp.emdbcconfig copyandpropagateoc4jdirinfo: propagating /u01/app/oracle/product/11.2.0/db/oc4j/j2ee/isqlplus_node1 to remote nodes ...aug 17, 2014 5:05:29 pm oracle.sysman.emcp.emdbcconfig copyandpropagateoc4jdirinfo: propagating /u01/app/oracle/product/11.2.0/db/oc4j/j2ee/isqlplus_node2 to remote nodes ...aug 17, 2014 5:05:34 pm oracle.sysman.emcp.emagentconfig deploystatedirsinfo: propagating /u01/app/oracle/product/11.2.0/db/node1_racdb1 to remote nodes ...aug 17, 2014 5:05:37 pm oracle.sysman.emcp.emagentconfig deploystatedirsinfo: propagating /u01/app/oracle/product/11.2.0/db/node2_racdb2 to remote nodes ...aug 17, 2014 5:05:38 pm oracle.sysman.emcp.util.dbcontrolutil securedbconsoleinfo: securing database control (this may take a while) ...aug 17, 2014 5:06:30 pm oracle.sysman.emcp.util.dbcontrolutil startomsinfo: starting database control (this may take a while) ...aug 17, 2014 5:08:26 pm oracle.sysman.emcp.emdbpostconfig performconfigurationinfo: database control started successfullyaug 17, 2014 5:08:26 pm oracle.sysman.emcp.emdbpostconfig performconfigurationinfo: >>>>>>>>>>> the database control url is https://node1:1158/em
其他问题：如果drop repos特别慢，可以尝试如下语句：alter system unquiesce;