Response is already committed!!! HELP!!!! NEWBIE

[yesidredondo]

Hi, i've a problem that don't know how to fix.

A "java.lang.IllegalStateException: Response is already committed!" exception
is beeing thrown when i set the content type to ms-excel in the
pagebeginrender method of a page:

// This is the code i'm using to set the content type on the pageBeginRender

HttpServletResponse responses =
this.getPage().getRequestCycle().getRequestContext().getResponse();
                try {
                        responses.setContentType("application/vnd.ms-excel");
                        responses.setHeader("Content-disposition",
                          "inline; filename=report.xls");
                        responses.setContentType("application/vnd.ms-excel");
                        responses.flushBuffer();
                } catch (IOException e) {
                        e.printStackTrace();
                }

and this is the full stacktrace:

java.lang.IllegalStateException: Response is already committed! at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.0.0)].server.http.EvermindHttpServletResponse.setContentType(EvermindHttpServletResponse.java:1049)at
org.apache.tapestry.request.ResponseOutputStream.open(ResponseOutputStream.java:182)at
org.apache.tapestry.request.ResponseOutputStream.write(ResponseOutputStream.java:270)
at sun.nio.cs.StreamEncoder$CharsetSE.writeBytes(StreamEncoder.java:336)at
sun.nio.cs.StreamEncoder$CharsetSE.implClose(StreamEncoder.java:427)at
sun.nio.cs.StreamEncoder.close(StreamEncoder.java:160)at
java.io.OutputStreamWriter.close(OutputStreamWriter.java:222)at
java.io.BufferedWriter.close(BufferedWriter.java:244)   at
java.io.PrintWriter.close(PrintWriter.java:137) at
org.apache.tapestry.AbstractMarkupWriter.close(AbstractMarkupWriter.java:492)
at
org.apache.tapestry.engine.AbstractEngine.renderResponse(AbstractEngine.java:764)at
org.apache.tapestry.engine.AbstractEngine.activateExceptionPage(AbstractEngine.java:476)at
org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:931)at
org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:198)at
org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:159)       
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:740)at
javax.servlet.http.HttpServlet.service(HttpServlet.java:853)at
com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.0.0)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:765)


any help would be really appreciated. Thanks.

Hermann Yesid Redondo Eslava
Ingeniería de Sistemas
IT-GROUP LTDA.
Bogotá D.C., Colombia.

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