1. xml relative error in 4.0.
Error:
src-resolve: Cannot resolve the name 'xml:lang' to a(n) 'attribute declaration' component. Nested exception: src-resolve: Cannot resolve the name 'xml:lang' to a(n) 'attribute declaration' component.
prevent the parser from checking Sun's XSD file.
open your portlet.xml file in WEB-INF, at the very first tag : ` portlet-app `, for the atrribute ` xsi:schemaLocation `, remove the Sun's xsd reference, change it to this:
` xsi:schemaLocation="" `
