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getOutputStream() has already been called for

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By: Lin Yang - linyang

getOutputStream() has already been called for

2002-11-30 22:54

I can generate pdf from xml successfully, however, it always gives me this error java.lang.IllegalStateException: getOutputStream() has already been called for this response

when I generate pdf from browser.


Here is my sample code in jsp:

bytes =


reportPath + "/" + reportFileName + ".jasper",











I copied the code from sample code compile.jsp.

Anyone knows what causes the error ?










By: Teodor Danciu - teodord

RE: getOutputStream() has already been called for

2002-12-01 23:16




This is a JSP problem that depends on the way

the Web server deals with the response.


I would try to use servlets instead of JSP when

sending binary content to the browser, because

with servlets you have better control over what

and when you send.


For example, your problem might come from

some blank spaces in your JSP.


I hope this helps.







By: Steven Blough - stevenblough

RE: getOutputStream() has already been called for

2002-12-02 05:42

Also check the page you are submitting the report request from. One of our developers had this problem when he had a submit button invoking javascript that also submitted the page. This was causing 2 threads to be spawned for the same request. His problem was fixed by changing the submit button to a normal button.


Good luck

Steven Blough

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