INFO [null]: Error parsing facelets library descriptor java.lang.ClassCastException: org.apache.xerces.parsers.XML11Configuration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration at org.apache.xerces.parsers.DOMParser.(Unknown Source) at org.apache.xerces.parsers.DOMParser.(Unknown Source) at org.apache.xerces.jaxp.DocumentBuilderImpl.(Unknown Source) at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown Source) at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.createDocument(SAX2DOM.java:326) at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.(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 org.netbeans.modules.web.jsf.editor.facelets.mojarra.ConfigManager$ParseTask.getDocument(ConfigManager.java:915) at org.netbeans.modules.web.jsf.editor.facelets.mojarra.ConfigManager$ParseTask.call(ConfigManager.java:840) Caused: com.sun.faces.config.ConfigurationException: Unable to parse document 'file:/Users/marekfukala/NetBeansProjects/vpa/src/main/webapp/WEB-INF/vpa.taglib.xml': org.apache.xerces.parsers.XML11Configuration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration at org.netbeans.modules.web.jsf.editor.facelets.mojarra.ConfigManager$ParseTask.call(ConfigManager.java:849) at org.netbeans.modules.web.jsf.editor.facelets.mojarra.ConfigManager$ParseTask.call(ConfigManager.java:796) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at org.netbeans.modules.web.jsf.editor.facelets.mojarra.ConfigManager.getConfigDocuments(ConfigManager.java:662) Caused: java.util.concurrent.ExecutionException at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222) at java.util.concurrent.FutureTask.get(FutureTask.java:83) at org.netbeans.modules.web.jsf.editor.facelets.mojarra.ConfigManager.getConfigDocuments(ConfigManager.java:674) at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.parseLibraries(FaceletsLibrarySupport.java:295) at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.findLibraries(FaceletsLibrarySupport.java:232) at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.getLibraries(FaceletsLibrarySupport.java:160) at org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.librariesChanged(FaceletsLibrarySupport.java:148) at org.netbeans.modules.web.jsf.editor.index.JsfIndexer$Factory.scanFinished(JsfIndexer.java:136) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFinished(RepositoryUpdater.java:1496) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSource(RepositoryUpdater.java:3116) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSources(RepositoryUpdater.java:2999) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.getDone(RepositoryUpdater.java:2774) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:1911) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:3469) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:3411) at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:574) at java.util.concurrent.Executors$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) [catch] at java.lang.Thread.run(Thread.java:637)