XSLT transform problem in JDeveloper 9i

Question

I have the following method which is called from a JSP which accepts an XMLDocument and XSL filename, generates HTML and sends this to the response object:
public void processOutput(HttpServletResponse response
, XMLDocument xmlDoc
, String xslFileName)
throws Exception
DOMParser parser = new DOMParser();
parser.setPreserveWhitespace(true);
XMLDocument xslDoc = null;
PrintWriter out = null;
try{
URL xslURL = new URL(xslFileName);
parser.parse(xslURL);
xslDoc = parser.getDocument();
XSLStylesheet xslStyleSheet = new XSLStylesheet(xslDoc, xslURL);
XSLProcessor processor = new XSLProcessor();
response.setContentType("text/html");
out = response.getWriter();
processor.processXSL(xslStyleSheet, xmlDoc,out);
catch (Exception e){
throw new Exception("ERROR in XSLTManager.processOutput:"+e.getMessage());
finally{
xslDoc = null;
out=null;
when I run this in Jdeveloper 3.1.1.2 it works fine. When I run it in Jdeveloper 9.0.3.1 I get the following error ...
java.lang.Exception: ERROR in XSLTManager.processOutput:OutputStream already retrieved
... caused by the following line ...
out = response.getWriter();
Any help on this would be appreciated.

Answer 1

JDev 3.1 uses Oracle Web-to-Go as its servlet engine, and uses a previous release of Oracle JSP.
JDev 9.0.3 uses Oracle Containers for Java 9.0.3 (OC4J), and a later release of Oracle JSP.
Something in your JSP page has caused the JSP infrastructure to already get the outputstream, so you cannot get the writer. You'll need to:
(1) Figure out why your page is using the servlet output stream before you think it should be -- perhaps a <jsp:include flush="true"> in there? --, or
(2) Call getOutputStream() and let XSLT write to the outputstream instead of the writer.