Servlet.service() for servlet jsp threw exception java.lang.ClassCastException

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http://issues.apache.org/bugzilla/show_bug.cgi?id=30274

Servlet.service() for servlet jsp threw exception

Servlet.service() for servlet jsp threw exception java.lang.ClassCastException

           Summary: Servlet.service() for servlet jsp threw exception
                    Servlet.service() for servlet jsp threw exception
                    java.lang.ClassCastException
           Product: Tomcat 5
           Version: 5.0.18
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Catalina
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


A my javax.servlet.Filter implemtation threw java.lang.ClassCastException on the
line marked by ">>>>>>". 
-------------------------------------------------------------------------------
This is the doFilter method implementation:
-------------------------------------------------------------------------------
    public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest)request;
        String type = req.getHeader("Content-Type");

        // If this is not a multipart/form-data request continue
        if (type == null || !type.startsWith("multipart/form-data")) {
            chain.doFilter(request, response);
        }
        else {
            HttpSession session = ((HttpServletRequest)request).getSession();
            dir = (String)session.getAttribute("target");
            if ((dir == null) || ("".equals(dir))) {
                throw new ServletException("Invalid target dir.");
            }
            MultipartWrapper multi = new MultipartWrapper(req, dir);
            System.err.println("Is multi instance of ServletRequest? " + (multi
instanceof ServletRequest));
            System.err.println("Is response instance of ServletResponse? " +
(response instanceof ServletResponse));
            System.err.println("Multi class is " + multi.getClass().getName());
            System.err.println("Response class is " +
response.getClass().getName());
/*>>>>>>*/            chain.doFilter(multi, response);
        }

    }

This is debug output produced by "System.err.println..." lines:
---------------------------------------------------------------
Is multi instance of ServletRequest? true
Is response instance of ServletResponse? true
Multi class is com.oreilly.servlet.MultipartWrapper
Response class is org.apache.coyote.tomcat5.CoyoteResponseFacade

This the result in log:
-----------------------
2004-07-22 23:17:43 StandardContext[/manager]Manager: start: Starting web
application at '/wfs'
2004-07-22 23:18:25 StandardWrapperValve[jsp]: Servlet.service() for servlet jsp
threw exception
java.lang.ClassCastException
        at org.apache.jsp.upload_jsp._jspService(upload_jsp.java:47)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:284)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
        at cz.pve.fs.MultipartFilter.doFilter(MultipartFilter.java:61)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:233)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:257)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
        at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:245)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:199)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:184)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:164)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:156)
        at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:567)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:206)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:833)
        at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:732)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:619)
        at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:688)
        at java.lang.Thread.run(Thread.java:534)

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