- locked <0x00000000e7e3c560> (a sun.net.www.protocol.http.HttpURLConnection)
	at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:1033)
	at org.apache.xerces.impl.XMLEntityManager.startEntity(XMLEntityManager.java:941)
	at org.apache.xerces.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:908)
	at org.apache.xerces.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:241)
	at org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(XMLDocumentScannerImpl.java:1001)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:324)
	at org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:875)
	at org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:798)
	at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:108)
	at org.apache.xerces.parsers.DOMParser.parse(DOMParser.java:230)
	at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:298)
	at org.apache.xpath.jaxp.XPathImpl.evaluate(XPathImpl.java:474)
	at org.apache.xpath.jaxp.XPathImpl.evaluate(XPathImpl.java:521)
	at com.sun.faces.util.Util.getWebXmlVersion(Util.java:1361)
	at com.sun.faces.el.ELUtils.tryAddCDIELResolver(ELUtils.java:311)
	at com.sun.faces.el.ELUtils.buildFacesResolver(ELUtils.java:242)
	at com.sun.faces.application.ApplicationAssociate.initializeELResolverChains(ApplicationAssociate.java:503)
	at com.sun.faces.application.ApplicationImpl.performOneTimeELInitialization(ApplicationImpl.java:1405)
	at com.sun.faces.application.ApplicationImpl.getELResolver(ApplicationImpl.java:529)
	at javax.faces.application.ApplicationWrapper.getELResolver(ApplicationWrapper.java:621)
	at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:256)

    /**
     * Get the web.xml version (if any).
     *
     * @param facesContext the Faces context.
     * @return the version found, or "" if none found.
     */
    public static String getWebXmlVersion(FacesContext facesContext) {
        String result = "";
        InputStream stream = null;
        try {
            URL url = facesContext.getExternalContext().getResource("/WEB-INF/web.xml");
            if (url != null) {
                XPathFactory factory = XPathFactory.newInstance();
                XPath xpath = factory.newXPath();
                xpath.setNamespaceContext(new JavaeeNamespaceContext());
                stream = url.openStream();
                result = xpath.evaluate("string(/javaee:web-app/@version)", new InputSource(stream));
            }
        } catch (MalformedURLException mue) {
        } catch (XPathExpressionException | IOException xpee) {
        } finally {
            if (stream != null) {
                try {
                    stream.close();
                } catch (IOException ioe) {
                }
            }
        }
        return result;
    }