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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=9856 sendError(404) fails after getOutputStream() is called, if you have a custom 404 error-page Summary: sendError(404) fails after getOutputStream() is called, if you have a custom 404 error-page Product: Tomcat 4 Version: 4.0.2 Final Platform: PC OS/Version: Linux Status: NEW Severity: Normal Priority: Other Component: Catalina AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] A response.sendError(404) invokation will not work correctly if it is done after a response.getOutputStream() invokation AND you have a custom 404 error- page. The following code works correctly. If you have configured a custom 404 error- page, you receive it; if you have not configured a custom error page, you will receive a default 404 error page. public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.sendError(404); } The following code does not work correctly, but I think it should. If you have configured a custom 404 error-page, you will receive nothing (each browser will handle this differntly); however, if you have not configured a custom error page, you will receive a default 404 error page. public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.getOutputStream(); response.sendError(404); } I am using Tomcat 4.0.2 final with Sun's JDK 1.4 final on Linux 7.1 on a single Intel processor with 512 MB of memory. I am quite sure that my custom 404 error- page is configured correctly because it is displayed when the DefaultServlet can not find a page and when any Servlet calls sendError(404) without calling getOutputStream(). -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>