Try by removing/exluding (if you have it in you r dependencies) xerces. On Fri, 2 Dec 2016 at 07:10 Peter Petranik <[email protected]> wrote:
> 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. > -- 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.
