If you are getting class not found exception for a particular library upon deploying the application then check If the ‘Deploy by default’ option is checked for the library in your application.

If the library is referred in the Weblogic-application.xml then make sure that the library has to be deployed to the server. This will be referred in you Weblogic-application.xml as

<library-ref>
<library-name>adf.oracle.domain</library-name>
</library-ref>