Redirect Apache to Tomcat - IllegalStateException when navigating in the app

I'm using Apache 2.2 and Tomcat 6.0.18 on Windows XP. I've enabled the mod_proxy module to redirect the traffic from my Apache web server to Tomcat. I only updated the httpd.conf file to have the redirection like this: ProxyPass /myapp http://MYMACHINENAME:8080/MyApp/Start ProxyPassReverse /myapp http://MYMACHINENAME:8080/MyApp/Start The problem I'm experiencing is that the initial redirect works fine, the JSP page renders correctly. When I try to navigate to a different JSP page by clicking on a menu on the page, I get the exception: SEVERE: Servlet.service() for servlet StartIntro threw exception java.lang.IllegalStateException at org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:435) at StartIntro.doPost(StartIntro.java:103) at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:595) If I don't do any redirection from Apache, the navigation works fine. Any ideas what I should look into? TIA, Magnus Lassi
The question is slightly confusing because Apache is NOT redirecting to Tomcat -- it is proxying the HTTP request to Tomcat. Please post the relevant code for StartIntro.java and ResponseFacade.java.

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