java.lang.NoSuchMethodError

[Dan Macklin <Da...@xenex.co.uk>]

Hi,

I have written an application that runs as a Java Application, and it works
fine.  I am now trying to integrate it into a servlet.  I am using apace
tomcat version 3.1, and keep getting the following stack trace.

Does anyone know why ?

Cheers

Dan


java.lang.NoSuchMethodError
        at
org.apache.crimson.tree.XmlDocumentBuilder.startDTD(XmlDocumentBuilder.java:
648)
        at
org.apache.crimson.parser.Parser2.maybeDoctypeDecl(Parser2.java:1118)
        at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:488)
        at org.apache.crimson.parser.Parser2.parse(Parser2.java:304)
        at
org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:433)
        at
org.apache.crimson.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:1
79)
        at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:135)
        at eComServlet.EComXMLUpload.control(EComXMLUpload.java:339)
        at eComServlet.uploader.upload(uploader.java:92)
        at eComServlet.uploader.handleRequest(uploader.java:55)
        at common.Model2Servlet.service(Model2Servlet.java:109)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:503)
        at
org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:597)
        at
org.apache.tomcat.servlets.InvokerServlet.service(InvokerServlet.java:257)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:503)
        at
org.apache.tomcat.core.ContextManager.service(ContextManager.java:559)
        at
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC
onnectionHandler.java:160)
        at
org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java:338
)
        at java.lang.Thread.run(Unknown Source)