Java Portlet is unsupported

This rule flags Java code that has references to the following packages:

• javax.portlet
• javax.portlet.filter

This rule also flags the following references in the portlet.xml file:

• <portlet-app></portlet-app>

The Java Portlet API and its deployment descriptors are not supported on Liberty, Consider alternatives such as JSP, JSF, or servlet-based applications, which are supported on Liberty.
Deploy this part of your application on WebSphere Application Server traditional.