1 Reply Latest reply on Aug 25, 2005 10:44 AM by Rajakumar Sennayan

    Servlets to JSP forwarding of http requests

    sundar20 Newbie

      Hi All,

      I have the following situation in which I am repeatedly getting the server side error message as follows.

      2004-04-27 16:22:20,453 ERROR [org.jboss.web.localhost.Engine] ApplicationDispatcher[/online] Servlet.service() for servlet jsp threw exception
      org.apache.jasper.JasperException: getOutputStream() has already been called for this response
      at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)
      at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
      at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:575)
      at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:498)
      at com.asdc.ppm.ListPPMProjects.doPost(ListPPMProjects.java:136)
      at com.asdc.ppm.ListPPMProjects.doGet(ListPPMProjects.java:18)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
      at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:432)
      at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:356)
      at com.asdc.ppm.PPMRequestHandler.doPost(PPMRequestHandler.java:80)
      at com.asdc.ppm.PPMRequestHandler.doGet(PPMRequestHandler.java:18)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurityMgrRealm.java:220)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(ContainerStatsValve.java:76)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:65)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:197)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
      at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:549)
      at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:605)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:677)
      at java.lang.Thread.run(Thread.java:534)


      What I am trying to do here is from a static html page i am referring to a hyper link to a servlet which in turn does some business logic processing and forwards the request to another servlet which does further processing and then binds an object to the request and forwards it to a JSP page for presentation.

      My doubt is can I do this kind of multiple forwarding of request through a Servlet to Servlet to JSP while binding objects to the request object?

      What is wrong with my code?

      If somebody would want to look at the code, I can send the same or post it in the forum.

      Please advise..

      Sundar