If it is included, remove the Struts facet since HATS standard portlets do not support Struts.
In the HATS Projects view, right-click the portlet project and select Properties.
On the Properties page, select Project Facets.
If selected, clear the check box for Struts for IBM
portlets.
Click OK.
Replace the IBM® Portlets facet with the JSR Portlets facet.
In the HATS Projects view, right-click the portlet project and select Properties.
On the Properties page, select Project Facets.
Clear the box for IBM Portlets and select
the box for JSR Portlets. In the Version
column, click the drop-down icon next to the version number and change it to
1.0 for JSR 168 or 2.0 for JSR 286.