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java.lang.AbstractMethodError: org.apache.xerces.dom.ElementNSImpl.setUserData(Ljava/lang/String;Ljava/lang/Object;Lorg/w3c/dom/UserDataHandler;)Ljava/lang/Object;	at	at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)	at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(Unknown Source)	at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)	at org.apache.xerces.impl.XMLNSDocumentScannerImpl$NSContentDispatcher.scanRootElementHook(Unknown Source)	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)	at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)	at javax.xml.parsers.SAXParser.parse(	at	at	at	at	at	at	at	at$Rebinder.rebind(	at	at	at$1.getAllPossibleRebindAnswers(	at$UnifyVisitor.createStaticRebindExpression(	at$UnifyVisitor.createRebindExpression(	at$UnifyVisitor.handleMagicMethodCall(	at$UnifyVisitor.endVisit(	at	at	at	at	at	at	at$ListContext.traverse(	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at	at$	at	at	at