解决WebLogic Server 11g EM的503--Service Unavailable

安装完WebCenter后，发现访问WebLogic Server EM报“Error 503--Service Unavailable”错误，错误信息如下：

Error 503--Service Unavailable

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1: 10.5.4 503 Service Unavailable The server is currently unable to handle the request due to a temporary overloading or maintenance of the server. The implication is that this is a temporary condition which will be alleviated after some delay. If known, the length of the delay may be indicated in a Retry-After header. If no Retry-After is given, the client SHOULD handle the response as it would for a 500 response. Note: The existence of the 503 status code does not imply that a server must use it when becoming overloaded. Some servers may wish to simply refuse the connection.

查找了一下原因，发现因为是$MW_HOME/user_projects/domains/<your_domain>/sysman/state/targets.xml文件丢失引起的，解决步骤如下：
1.备份旧的targets.xml文件；
2.按以下模板修改targets.xml文件

<Target TYPE="oracle_ias_farm" NAME="Farm_%DOMAIN-NAME%" DISPLAY_NAME="Farm_%DOMAIN-NAME%">
<Property NAME="MachineName" VALUE="%ADMINSERVER-HOST-NAME%"/>
<Property NAME="Port" VALUE="%ADMINSERVER-PORT%"/>
<Property NAME="Protocol" VALUE="%JMX-PROTOCOL%"/>
<Property NAME="isLocal" VALUE="true"/>
<Property NAME="serviceURL" VALUE="%SERVICE-URL%"/>
<Property NAME="WebLogicHome" VALUE="%WEBLOGIC-HOME%"/>
<Property NAME="DomainHome" VALUE="%DOMAIN-HOME%"/>
</Target>

 

按你域的情况修改以上百分号表示的变量，以下是示例：

<Target TYPE="oracle_ias_farm" NAME="Farm_ecm_domain" DISPLAY_NAME="Farm_ecm_domain">
<Property NAME="MachineName" VALUE="myhostname.com"/>
<Property NAME="Port" VALUE="7001"/>
<Property NAME="isLocal" VALUE="true"/>
<Property NAME="Protocol" VALUE="t3"/>
<Property NAME="serviceURL" VALUE="service:jmx:t3://myhostname.com:7001/jndi/weblogic.management.mbeanservers.domainruntime"/>
<Property NAME="WebLogicHome" VALUE="/u00/middleware/wlserver_10.3"/>
<Property NAME="DomainHome" VALUE="/u00/middleware/user_projects/domains/ecm_domain"/>
</Target>

3.重启AdminServer；

4.确认 http://<server>:7001/em能够正常访问；

5.备份正确的targets.xml文件。