oracle中em启动失败怎么办

这篇文章主要为大家展示了“oracle中em启动失败怎么办”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“oracle中em启动失败怎么办”这篇文章吧。客户的服务器启动不了em报错Environment variable ORACLE_UNQNAME not defined. Please set ORACLE_UNQNAME to database unique name.需要做的比对
1，oracle 目录下的TNS 、LSN配置文件hostname2，linux /etc/hosts 里的hostname3，oracle 用户下 .bash_profile 或者是 .bashrc能配置hostname的地方是否都一致我出现的问题是，用户改动过hostname , oracle 下的.bash_profile 申明的hostanme 和oracle 数据库的不一致所以报错，修改一致source .bash_profile 可以使用如果你确认hostname 和 sid 实例名都没有错那么建议你进行emc重建操作$ sqlplus / as sysdba
SQL> alter user dbsnmp identified by py123456;
User altered.
SQL> drop role MGMT_USER;
Role dropped.

SQL> drop user MGMT_VIEW cascade;
User dropped.

SQL> drop user sysman cascade;
User dropped.

SQL> drop user sysman cascade;
SQL> drop PUBLIC SYNONYM MGMT_TARGET_BLACKOUTS;
Synonym 免费主机域名dropped.
SQL> drop public synonym SETEMVIEWUSERCONTEXT;
Synonym dropped免费主机域名.
SQL>quit$ emca -config dbcontrol db -repos create进行创建操作STARTED EMCA at May 26, 2017 10:37:01 AM
EM Configuration Assistant, Version 11.2.0.3.0 Production
Copyright (c) 2003, 2011, Oracle. All rights reserved.
Enter the following information:
Database SID: oracle11
log4j:WARN No appenders could be found for logger (emSDK.config).
log4j:WARN Please initialize the log4j system properly.
Listener port number:
Listener ORACLE_HOME [ ]:
Password for SYS user:
Password for DBSNMP user:
Password for SYSMAN user:
Email address for notifications (optional):
Outgoing Mail (SMTP) server for notifications (optional):
WARNING: ORA-00955: name is already used by an existing object— 告警这个的话是配置没清除干净使用$ emca -config dbcontrol db -repos recreate执行按步骤操作最后可以使用em
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