Descargar pdf con jsp

Hola, espero me puedan apoyar con esto:

Estoy intentando descargar un archivo .pdf mediante un jsp, el codigo que utilizo es este en el jsp:

<%
                                if(request.getSession().getAttribute("reporteArchivo")!=null){
                                        String reporte = request.getSession().getAttribute("reporteArchivo").toString();
                                        StringBuilder revReporte = new StringBuilder(reporte).reverse();
                                        revReporte = new StringBuilder(revReporte.substring(0,revReporte.indexOf("\\"))).reverse();
                                        System.out.println(revReporte);
                                       
                                        response.setContentType("application/pdf");
                                 
                                        response.setHeader("Content-Disposition","attachment;filename=" + revReporte );
                                         
                                        try{
                                            File fileToDownload = new File(reporte );
                                            FileInputStream fileInputStream = new
                                            FileInputStream(fileToDownload);
                                            int i;
                                            while ((i=fileInputStream.read())!=-1) {
                                                      out.write(i);
                                            }
                                           
                                            fileInputStream.close();
                                            out.flush();
                                            out.close();
                                        }catch(Exception e){
                                           e.printStackTrace();
                                        }finally{
                                               
                                        }
                                       
                                }

mas sin embargo me genera la siguiente excepcion:

13/07/2011 12:55:02 AM org.apache.catalina.core.ApplicationContext log
INFO: PageContextImpl.release(): Internal error flushing buffer
13/07/2011 12:55:02 AM org.apache.catalina.core.ApplicationDispatcher invoke
GRAVE: El Servlet.service() para servlet jsp lanzó una excepción
java.io.IOException: Stream closed
at org.apache.jasper.runtime.JspWriterImpl.ensureOpen(JspWriterImpl.java:204)
at org.apache.jasper.runtime.JspWriterImpl.clearBuffer(JspWriterImpl.java:160)
at org.apache.jsp.afiliadoscap.afiliadoArchivo_jsp._jspService(afiliadoArchivo_jsp.java:472)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:659)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:457)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:395)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311)
at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:686)
at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:656)
at org.apache.jsp.navegador_jsp._jspService(navegador_jsp.java:172)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
13/07/2011 12:55:02 AM org.apache.catalina.core.StandardWrapperValve invoke
GRAVE: Servlet.service() para servlet jsp lanzó excepción
java.io.IOException: Stream closed
at org.apache.jasper.runtime.JspWriterImpl.ensureOpen(JspWriterImpl.java:204)
at org.apache.jasper.runtime.JspWriterImpl.clearBuffer(JspWriterImpl.java:160)
at org.apache.jsp.afiliadoscap.afiliadoArchivo_jsp._jspService(afiliadoArchivo_jsp.java:472)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:659)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:457)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:395)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311)
at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:686)
at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:656)
at org.apache.jsp.navegador_jsp._jspService(navegador_jsp.java:172)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
13/07/2011 12:55:03 AM org.apache.catalina.core.StandardHostValve custom
GRAVE: Exception Processing ErrorPage[exceptionType=java.lang.Exception, location=/javaException.html]
java.lang.IllegalStateException
at org.apache.coyote.Response.reset(Response.java:297)
at org.apache.catalina.connector.Response.reset(Response.java:653)
at org.apache.catalina.connector.Response.reset(Response.java:920)
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:357)
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:213)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)

Espero alguien me pueda ayudar con esto
Saludos

Opciones de visualización de comentarios

Seleccione la forma que prefiera para mostrar los comentarios y haga clic en «Guardar las opciones» para activar los cambios.

OutputStream del HttpServletResponse

Como salida debes darle el response.getOutputStream();

  
Hay mas informacion aqui