D/L file: Servlet response already use stream.

[terron]

Hello,

while trying to download a file from the backing bean to the client (browser),

HSSFWorkbook wb = abean.getExpexcel();
try {
 ServletOutputStream sos = response.getOutputStream();
 wb.write(sos);
 sos.flush();
 } catch (Exception e) {
 System.out.println("Allg. Fehler bei expexcel'ing...");
 e.printStackTrace();
 }

I am getting a

java.lang.IllegalStateException: Servlet response already use stream, Writer not possible

at org.ajax4jsf.framework.ajax.xmlfilter.FilterServletResponseWrapper.
getWriter(FilterServletResponseWrapper.java:226)
at com.sun.facelets.FaceletViewHandler.
createResponseWriter(FaceletViewHandler.java:400)
at com.sun.facelets.FaceletViewHandler.
renderView(FaceletViewHandler.java:557)
at org.ajax4jsf.framework.ViewHandlerWrapper.
renderView(ViewHandlerWrapper.java:108)
at org.ajax4jsf.framework.ajax.AjaxViewHandler.
renderView(AjaxViewHandler.java:233)
at com.sun.faces.lifecycle.RenderResponsePhase.
execute(RenderResponsePhase.java:106)
at com.sun.faces.lifecycle.LifecycleImpl.
phase(LifecycleImpl.java:251)
at com.sun.faces.lifecycle.LifecycleImpl.
render(LifecycleImpl.java:144)

This seems to be related to Ajax4Jsf, since it works without problems in a configuration without Ajax4Jsf + the exception already mention Ajax4Jsf.

Any way to avoid this error (workaround)?

Does it have to do with the phase in the lifecycle?
should I move the excecution to another phase?

Thanks!

[terron]

Any feedback here?
I am trying workarounds, but none is doing it yet

Any help appreciated!