ClassCastException: weblogic.xml.jaxp.RegistrySAXParserFactory

Question

Hi all,
I am struggling with including the jstl core taglib. Whenever I am including the directive in include.jsp, WL 9.2 throws the following exception during portlet access:
Nested Exception is
weblogic.servlet.jsp.CompilationException: Failed to compile JSP /WEB-INF/jsp/view.jsp
view.jsp:1:1: The validator class: "org.apache.taglibs.standard.tlv.JstlCoreTLV" has failed with the following exception: "java.lang.ClassCastException: weblogic.xml.jaxp.RegistrySAXParserFactory".
<%@ include file="/WEB-INF/jsp/include.jsp" %>
^--------------------------------------------^
Standard-1.06 and JSTL-1.06 are included in WEB-INF/lib. Has anyone encountered this problem as well? Actually it's the same as http://forums.bea.com/bea/thread.jspa?forumID=600000007&threadID=400000561
Kind regards,
Matthias

Answer 1

hi,
you can set the SAXParserFactory in your weblogic-application.xml file e.g. (using xerces.jar)
<xml><parser-factory>               <saxparser-factory>org.apache.xerces.jaxp.SAXParserFactoryImpl</saxparser-factory>
<document-builder-factory>org.apache.xerces.jaxp.DocumentBuilderFactoryImpl</document-builder-factory>     
</parser-factory>               
</xml>
and setting below in weblogic.xml file
<container-descriptor>
<prefer-web-inf-classes>true</prefer-web-inf-classes>
</container-descriptor>
(the above property has to be set if deploying BirtViewer on Weblogic)
Unfortunately it can be not enough if xml-apis.jar file is on the classpath. In such case you'd tell weblogic which packages should be prefered e.i. in your weblogic-application.xml file add
<prefer-application-packages>
<package-name>org.apache.xerces.*</package-name>
</prefer-application-packages>
Apparently Weblogic has problems to use the correct XML parser while compiling JSP pages hence the exceptions
Edited by gstasica at 01/14/2008 8:59 AM