When a portlet is included in a decorator using $jetspeed.renderPortletEntity, the action urls generated by this portlet doesn't work.
This bug is due to the following code in class org.apache.jetspeed.container.ContainerValve :
public void invoke(RequestContext request, ValveContext context) throws PipelineException
window = state.getPortletWindowOfAction();
if (window != null && page.getFragmentById(window.getId().toString()) == null)
// target window doesn't exists anymore or the target page is not accessible (anymore)
// remove any navigational state for the window
// as this is an action request which cannot be handled, perform a direct redirect after sync state (for the other windows)
redirect = true;
Indeed, in this case, the valve should not perform a redirect because even if the portlet is not in the page (but in the decorator), the action have to be performed.