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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I get a NoClassDefFoundError for the org/jdom/Document class
when I try to execute an XPath expression on a web application deployed to Oracle
Application Server 9052 (yeah I know, it’s a pos). It makes
absolutely no sense because I’ve had no problems with JDOM for parsing
and walking the document tree in the same application. This exception
only occurs when I try to execute an XPath expression to get a specific element
in the document. The same war application works correctly in Tomcat 5.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This is the function where the exception is thrown:</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> private Element findItemElement(Document
d, String id) {</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> String expr =
"/ItemReviewData/ContentDictionary/Items/Item[@id='" + id +
"']";</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> try {</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>
XPath xpath = XPath.newInstance(expr);</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>
return (Element) xpath.selectSingleNode(d);</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> } catch
(JDOMException e) {</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>
e.printStackTrace();</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> } catch
(Exception e) {</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>
e.printStackTrace();</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> }</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> return null;</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> }</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This is the stack trace:</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>500 Internal Server Error</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>java.lang.NoClassDefFoundError: org/jdom/Document at
org.jaxen.jdom.DocumentNavigator.getDocumentNode(DocumentNavigator.java:313) at
org.jaxen.expr.DefaultAbsoluteLocationPath.evaluate(DefaultAbsoluteLocationPath.java:113) at
org.jaxen.expr.DefaultXPathExpr.asList(DefaultXPathExpr.java:107) at
org.jaxen.BaseXPath.selectNodesForContext(BaseXPath.java:716) at
org.jaxen.BaseXPath.selectNodes(BaseXPath.java:239) at
org.jaxen.BaseXPath.selectSingleNode(BaseXPath.java:262) at
org.jdom.xpath.JaxenXPath.selectSingleNode(JaxenXPath.java:153) at
org.nbme.fbp.ir.service.impl.XmlBluePrintServiceImpl.findItemElement(XmlBluePrintServiceImpl.java:233) at
org.nbme.fbp.ir.service.impl.XmlBluePrintServiceImpl.updateItemReviewStatus(XmlBluePrintServiceImpl.java:170) at
org.nbme.fbp.ir.action.itemreview.ItemPageAction.executeAction(ItemPageAction.java:35) at
org.nbme.fbp.ir.action.SpringBaseAction.execute(SpringBaseAction.java:39) at
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419) at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224) at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at
com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65) at
clime.messadmin.core.MessAdminFilter.doFilter(MessAdminFilter.java:166) at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.1.0)].server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16) at
org.nbme.common.security.SecurityFilter.doFilter(SecurityFilter.java:70) at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.1.0)].server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:20) at
com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:39) at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.1.0)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:600) at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.1.0)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:317) at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.1.0)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:793) at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.1.0)].server.http.AJPRequestHandler.run(AJPRequestHandler.java:208) at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.1.0)].server.http.AJPRequestHandler.run(AJPRequestHandler.java:125) at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.1.0)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192) at
java.lang.Thread.run(Thread.java:534)</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>If anybody has any ideas, I’ll be eternally grateful.
I’m pretty sure it has to do with Oracle but I would love to find a
workaround.</span></font></p>
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