Database Software

Hi,

I have a problem whereby whenever i run the servlet, my serlvlet was marked as unavailable. have Stripped down the servlet to bare minimum and was able to run it. It was only after i placed the following code that it was unable to run.

+public void doGet (HttpServletRequest request, HttpServletResponse response, String additionalParameter) throws ServletException, IOException, Exception {+
+ +
+ int which = 0;+
+ String name = request.getParameter( "name" );+

+ try {+
+ Oracle oracle = new Oracle(jdbcUrl, user, password);+
+ +
+ Attachment attachment = Attachment.createInstance(+
+ new String[] {}, "OWLPRIME",+
+ InferenceMaintenanceMode.NO_UPDATE, QueryOptions.DEFAULT);+

+ +
+ GraphOracleSem graph = new GraphOracleSem(oracle, modelName, attachment);+
+ ModelOracleSem model3 = new ModelOracleSem(graph);+

Part of the error is as follow:

Jun 22, 2010 9:44:50 AM org.apache.catalina.core.ApplicationContext log
INFO: Marking servlet ExpertFinderServlet as unavailable
Jun 22, 2010 9:44:50 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Allocate exception for servlet MyServlet
java.lang.ClassNotFoundException: com.hp.hpl.jena.rdf.model.Model
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1516)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1361)

Unable to find explaination or solution to this problem. Would appreciate any help here. Thank You.