I found the solution for my problem with this exception, according to Javadoc and databasesandlife.com <https://www.databasesandlife.com/java-always-explicitly-specify-which-xml-parser-to-use/> I have used two system properties and problem was gone, because our code was written to use JDK xerces
-Djavax.xml.parsers.DocumentBuilderFactory=com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl -Djavax.xml.parsers.SAXParserFactory=com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl Am Freitag, 2. Dezember 2016 11:10:58 UTC+1 schrieb Peter Petranik: > > Hi, I have a same problem after I updated my application from GWT 2.7 to > 2.8 > > That is the code that raises the exception: > DocumentBuilderFactory.newInstance().newDocumentBuilder() > > And that is the exception: > 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>(Unknown Source) > at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source) > at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Unknown Source) > at > org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown > Source) > ... > > Has somebody already found some solution how to fix that ? > > Am Donnerstag, 6. Oktober 2016 09:20:49 UTC+2 schrieb Darren Smith: >> >> Hi, >> >> I am developing a <web-app> that contains within it >> - a vanilla HttpServlet >> - a GWT RPC Service implementation (RemoteServiceServlet) >> >> I am currently using [GWT2.8rc1]. >> >> Both servlets manipulate XML documents, and hence make calls to the >> following code >> DocumentBuilderFactory docfactory = DocumentBuilderFactory.newInstance(); >> docfactory.setNamespaceAware(true); >> >> DocumentBuilder builder = docfactory.newDocumentBuilder(); // * problem >> here * >> >> When I launch the application in Eclipse, using the embedded >> Jetty container, the vanilla HttpServlet will fail at the line >> DocumentBuilder builder = docfactory.newDocumentBuilder(); // * problem >> here * >> >> The error message is >> java.lang.ClassCastException: >> org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast >> to org.apache.xerces.xni.parser.XMLParserConfiguration >> >> Having done some research, this exception is typically raised when there >> are several Xerces implementations found on the classpath. >> (I can only see Xerces implementations in gwt-dev and in Eclipse as a >> plugin). >> >> >> For the GWT RPC Service implementation, launched as part of the same >> <web-app>, the XML document processing works fine - i.e. no exception >> raised. >> >> If I comment out in the web.xml file the GWT-RPC servlet defintion, then >> the vanilla HttpServlet will perform the XML document processing without an >> exception. >> >> >> Has anyone encountered similar problems? >> >> Darren Smith. >> >> >> -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.
