java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
        at org.apache.xerces.parsers.DOMParser.<init>(DOMParser.java:0)
        at org.apache.xerces.parsers.DOMParser.<init>(DOMParser.java:0)
        at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(DocumentBuilderImpl.java:0)
        at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(DocumentBuilderFactoryImpl.java:0)
        at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.createDocument(SAX2DOM.java:326)
        at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.<init>(SAX2DOM.java:85)
        at com.sun.org.apache.xalan.internal.xsltc.runtime.output.TransletOutputHandlerFactory.getSerializationHandler(TransletOutputHandlerFactory.java:187)
        at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.getOutputHandler(TransformerImpl.java:392)
        at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:298)
        at com.sun.faces.config.ConfigManager$ParseTask.getDocument(ConfigManager.java:906)
Caused: com.sun.faces.config.ConfigurationException: Unable to parse document 'jar:file:/java/icefaces-1.8.1/lib/icefaces-facelets.jar!/META-INF/jsf-core.taglib.xml': org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
        at com.sun.faces.config.ConfigManager$ParseTask.call(ConfigManager.java:840)
        at com.sun.faces.config.ConfigManager$ParseTask.call(ConfigManager.java:787)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
Caused: java.util.concurrent.ExecutionException: com.sun.faces.config.ConfigurationException: Unable to parse document 'jar:file:/java/icefaces-1.8.1/lib/icefaces-facelets.jar!/META-INF/jsf-core.taglib.xml': org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
        at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
        at java.util.concurrent.FutureTask.get(FutureTask.java:83)
Caused: com.sun.faces.config.ConfigurationException: java.util.concurrent.ExecutionException: com.sun.faces.config.ConfigurationException: Unable to parse document 'jar:file:/java/icefaces-1.8.1/lib/icefaces-facelets.jar!/META-INF/jsf-core.taglib.xml': org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
        at com.sun.faces.config.ConfigManager.getConfigDocuments(ConfigManager.java:670)
Caused: java.lang.reflect.InvocationTargetException
        at sun.reflect.GeneratedMethodAccessor265.invoke(GeneratedMethodAccessor265.java:0)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.callMethod(FaceletsLibrarySupport.java:395)
        at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.parseLibraries(FaceletsLibrarySupport.java:278)
        at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.findLibraries(FaceletsLibrarySupport.java:237)
        at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.getLibraries(FaceletsLibrarySupport.java:164)
        at org.netbeans.modules.web.jsf.editor.JsfSupport.getFaceletsLibraries(JsfSupport.java:148)
        at org.netbeans.modules.web.jsf.editor.hints.ComponentUsagesChecker.checkCCCalls(ComponentUsagesChecker.java:86)
        at org.netbeans.modules.web.jsf.editor.hints.ComponentUsagesChecker.compute(ComponentUsagesChecker.java:69)
        at org.netbeans.modules.web.jsf.editor.hints.HintsRegistry.gatherHints(HintsRegistry.java:77)
        at org.netbeans.modules.web.jsf.editor.JsfHtmlExtension.computeErrors(JsfHtmlExtension.java:544)
        at org.netbeans.modules.html.editor.gsf.HtmlHintsProvider.computeErrors(HtmlHintsProvider.java:145)
        at org.netbeans.modules.csl.hints.GsfHintsProvider$2.run(GsfHintsProvider.java:319)
        at org.netbeans.modules.csl.hints.GsfHintsProvider$2.run(GsfHintsProvider.java:357)
        at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:129)
        at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:113)
        at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:190)
        at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:99)
        at org.netbeans.modules.csl.hints.GsfHintsProvider.run(GsfHintsProvider.java:293)
        at org.netbeans.modules.csl.hints.GsfHintsProvider.run(GsfHintsProvider.java:98)
        at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:654)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)