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Posted to users@jena.apache.org by "McGibbney, Lewis John" <Le...@gcu.ac.uk> on 2010/12/18 17:09:20 UTC

HTTP Status 500 - server interal error

Hello List,

I am currently using an ontology plugin within the Apache Nutch project. As part of its working the plugin uses Jena to enhance search results. When attempting to use the plugin I expeirenced the above Status 500 problem. I attach the exception which was caught within one of the JSP files used within the plugin.


exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /./refine-query-init.jsp at line 34

31:   try {
32:     Configuration nutchConf = NutchConfiguration.get(application);
33:     String urls = nutchConf.get("extension.ontology.urls");
34:     ontology = new org.apache.nutch.ontology.OntologyFactory(nutchConf).getOntology();
35:     if (urls==null || urls.trim().equals("")) {
36:       // ignored siliently
37:     } else {


Stacktrace:
        org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:401)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:717)


Having undertaken some reading on this plugin, I understand that this problem might stem from Tomcat

and Jena using conflicting versions of the same Xerces library. My question is what version of the Xerces library

does Jena currently use?

Hopefully if I can update my Xerces verson within Tomcat I can resolve this issue.

Thank you

Lewis

Glasgow Caledonian University is a registered Scottish charity, number SC021474

Winner: Times Higher Education's Widening Participation Initiative of the Year 2009 and Herald Society's Education Initiative of the Year 2009
http://www.gcu.ac.uk/newsevents/news/bycategory/theuniversity/1/name,6219,en.html

Re: HTTP Status 500 - server interal error

Posted by Andy Seaborne <an...@epimorphics.com>.
Hi Lewis,

 > My question is what version of the Xerces library
 >
 > does Jena currently use?

Jena has shipped with version 2.7.1 for the last few releases.

The lib/ directory in the Jena distribution you're using should have the 
jar so you can check the version there.

	Andy


On 18/12/10 16:09, McGibbney, Lewis John wrote:
> Hello List,
>
> I am currently using an ontology plugin within the Apache Nutch project. As part of its working the plugin uses Jena to enhance search results. When attempting to use the plugin I expeirenced the above Status 500 problem. I attach the exception which was caught within one of the JSP files used within the plugin.
>
>
> exception
>
> org.apache.jasper.JasperException: An exception occurred processing JSP page /./refine-query-init.jsp at line 34
>
> 31:   try {
> 32:     Configuration nutchConf = NutchConfiguration.get(application);
> 33:     String urls = nutchConf.get("extension.ontology.urls");
> 34:     ontology = new org.apache.nutch.ontology.OntologyFactory(nutchConf).getOntology();
> 35:     if (urls==null || urls.trim().equals("")) {
> 36:       // ignored siliently
> 37:     } else {
>
>
> Stacktrace:
>          org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
>          org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:401)
>          org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
>          org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
>          javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>
>
> Having undertaken some reading on this plugin, I understand that this problem might stem from Tomcat
>
> and Jena using conflicting versions of the same Xerces library. My question is what version of the Xerces library
>
> does Jena currently use?
>
> Hopefully if I can update my Xerces verson within Tomcat I can resolve this issue.
>
> Thank you
>
> Lewis
>
> Glasgow Caledonian University is a registered Scottish charity, number SC021474
>
> Winner: Times Higher Education's Widening Participation Initiative of the Year 2009 and Herald Society's Education Initiative of the Year 2009
> http://www.gcu.ac.uk/newsevents/news/bycategory/theuniversity/1/name,6219,en.html