Hi Darren,

We are seeing the same issue, did you find any resolution?

Regards,

Ian

On Thursday, 6 October 2016 08:20:49 UTC+1, Darren Smith wrote:
>
> 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.
>
>
>

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