I am getting this error when I drop the opensso.war in jboss deploy directory. java.lang.LinkageError: loader constraints violated when linking org/xml/sax/Parser class at com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source) The file xercesImpl.jar which is in lib/endorsed directory is getting conflicted with a similar file in the opesso.war file. The package statement on both the jars seems to be different. Any Help? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4197828#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...