重新配置EM的连接账号DBSNMP密码后保存设置时出错

由于密码更新，导致EM使用出现问题

所以需要在EM上重新配置DBSNMP的密码

但是配置完毕后，保存报错如下：

正在将实例 ×××11保存到资料档案库和代理 https://×××:3872/emd/main...-- 将 rac db 保存到代理时出现异常错误https://×××:3872/emd/main: oracle.sysman.emSDK.emd.comm.OperationException: could not write to targets.xml.bak file ... 已完成。
正在将实例 ×××12保存到资料档案库和代理 https://×××:3872/emd/main...-- 将 rac db 保存到代理时出现异常错误https://×××:3872/emd/main: oracle.sysman.emSDK.emd.comm.OperationException: could not write to targets.xml.bak file ... 已完成。
实例 ×××的属性已更新。

由于保存出错，还是无法正确使用EM，必须追究根源，

先尝试重新启动EM的agent服务

oracle $ cd /u01/app/oracle/OracleHomes/agent10g/bin

oracle $ ls emctl
emctl

oracle $ ./emctl
Oracle Enterprise Manager 10g Release 10.2.0.2.0.
Copyright (c) 1996, 2006 Oracle Corporation. All rights reserved.
Oracle Enterprise Manager 10g Agent Commands:
emctl start | stop agent
emctl status agent
emctl status agent -secure [-omsurl <http://<oms-hostname>:<oms-unsecure-port>/em/*>]
emctl getversion
emctl reload | upload | clearstate | getversion agent
emctl reload agent dynamicproperties [<Target_name>:<Target_Type>]....
emctl config agent <options>
emctl config agent updateTZ
emctl config agent getTZ
emctl resetTZ agent
emctl config agent credentials [<Target_name>[:<Target_Type>]]
Blackout Usage :
emctl start blackout <Blackoutname> [-nodeLevel] [<Target_name>[:<Target_Type>]].... [-d <Duration>]
emctl stop blackout <Blackoutname>
emctl status blackout [<Target_name>[:<Target_Type>]]....

The following are valid options for blackouts
<Target_name:Target_type> defaults to local node target if not specified.
If -nodeLevel is specified after <Blackoutname>,the blackout will be applied to all targets and any target list that follows will be ignored.
Duration is specified in [days] hh:mm

emctl getemhome
emctl ilint
emctl start | stop | status subagent
Secure Agent Usage :
emctl secure agent <registration password>
emctl unsecure agent

oracle $ ./emctl stop agent
Oracle Enterprise Manager 10g Release 10.2.0.2.0.
Copyright (c) 1996, 2006 Oracle Corporation. All rights reserved.
Stopping agent ... stopped.

oracle $ ./emctl start agent
Oracle Enterprise Manager 10g Release 10.2.0.2.0.
Copyright (c) 1996, 2006 Oracle Corporation. All rights reserved.
Starting agent ............................ started.

在此去EM页面保存设置

保存成功