因为需求需要重建EM,重建时因为某些错误被迫停止,比如对象已存在、用户已经存在等,最终找出了创建必备的条件；

1.环境变量(Oracle和Grid在同一个用户下安装):

ORACLE_HOME 要设为DB路径;

ORACLE_UNQNAME 要设置;

2.删除em相关的同义词:

select 'drop public synonym '||synonym_name||';' from dba_synonyms where regexp_like(synonym_name,'^MGMT_|^SMP_EMD|^EMD_') order by synonym_name;3.删除em相关用户:

drop user MGMT_VIEW;
drop user SYSMAN cascade;4.删除em相关role:

drop role MGMT_USER;5.检查em相关残留的对象,并删除:

select * from dba_objects where status='INVALID' AND OBJECT_TYPE='SYNONYM';6.重建em:

em -config dbcontrol  db  -repos  create

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