Got a weird one in AS 7.2.2:
As far as I know ui:insert supports only `name` attribute.
javax.servlet.ServletException: /WEB-INF/template.xhtml @10,38 <ui:insert> Attribute 'src', 'file' or 'page' is required
I suspect some namespace confusion but can't see further than that.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui"
xmlns:f="http://xmlns.jcp.org/jsf/core"
xmlns:ui="http://xmlns.jcp.org/jsf/facelets">
<h:head>
<title><ui:insert name="title">My beautiful webapp</ui:insert></title>
