Change database JDBC URL from deployed ear file

When i would like to change database JDBC URL of deployed application in weblogic from console , it gave below error 

Console encountered the following error java.lang.IllegalArgumentException: [J2EE Deployment SPI:260140]Unable to remove descriptor bean 

weblogic.j2ee.descriptor.wl.JDBCPropertyBeanImpl@179efc1([MYAPP]/JDBCDriverParams/Properties/Properties[user]) due to 'Unable to remove bean since not defined in plan'. The remover should first check to see if the bean is removable in the deployment plan prior to removing it.

Of course there is a way to solve this issue at weblogic side , but i prefered changing database url from ear file directly changing related jdbc.xml file

Action Plan,

• Stop WebLogic
• Locate ear file of application 
• Backup ear file 
• Unzip ear file
• unzip XXXX_myapp.ear
• Change url entitiy in META-INF/MYAPP-jdbc.xml to desired url
• Save MYAPP-jdbc.xml file
• Using jar , update relate ear file
• jar uvf XXXX_myapp.ear META-INF/MYAPP-jdbc.xml 
• Start Weblogic

You can observe the change from weblogic console 

Oracle Discoverer 11g host name change issues

I had to clone server which contains Oracle Discoverer 11g for a test purpose.Host name change process was done by examining the Rittman following document 

http://www.rittmanmead.com/2010/12/oracle-bi-ee-11g-managing-host-name-changes/

Successfull change process provided Admin Server and Managed server to run without any problem.

But 2 problems have been seemed ,

1.Port Number In Weblogiccluster Parameter Specified In Httpd.Conf Is Not An Integer Less Than 65535

Of course hostname change is not an easy process on 11g Discoverer which has a lot of components.Although changing hostname in related all files , some others can be missed. This problem occured from same manner.

In ORACLE_INSTANCE/config/OHSComponent/ohs-comp-name/moduleconf/module_disco.conf

<Location /discoverer tag contains WeblogicCluster address maps to disco server name and related port.It must be changed to new hostname

2.Discoverer Components Application URL

From Weblogic Enterprise Manager discoverer components have Application URL mapping to old hostname.Following directory contains configuration.xml stores Discoverer settings.

DOMAIN_HOME/config/fmwconfig/servers/WLS_DISCO/applications/discoverer_discoverer_version/configuration/

Head of configuration.xml related applicaton url can bee seen to change.