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From Leonard Gestrin <>
Subject RE: JSPwriterImpl generates IO exception while processing <jsp:include> that gets forwarded.
Date Sun, 26 Jul 2009 03:58:57 GMT
Hi Martin,
The filter is just a pass through to application code - it only gets to work if there is runtime
exception coming back from processing request. 

ErrorHandlerFilter  is mapped to REQUEST, FORWARD, INCLUDE

It has 

    filterChain.doFilter(request, response);
} catch (throwable th){
///   ..process th. (setting some attributes in requests for presentation in errorPage.jsp

Example execution path where the issue happens is the following 

Browser-> servletX->forward to result.sp; on result.jsp there is <jsp:include "someServlet"/>
 and "someServlet" throws runtime.

I hope it makes sense :)


-----Original Message-----
From: Martin Gainty [] 
Sent: Saturday, July 25, 2009 6:46 PM
To: Tomcat Users List
Subject: RE: JSPwriterImpl generates IO exception while processing <jsp:include> that
gets forwarded.

dont understand why you want to forward before jsp:include has been processed? 

could you explain a bit about webapp architecture or workflow you wish to implement?
Martin Gainty 
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> From:
> To:
> Date: Sat, 25 Jul 2009 15:08:51 -0700
> Subject: JSPwriterImpl generates IO exception while processing <jsp:include> that
gets forwarded.
> Hello, 
> This is my second attempt to get anyone's opinion if what's happening is a defect or
it can be prevented somehow. I hope it generates more replies. 
> In my webapp application I have servlet filter that handles error handling for runtime
exceptions; when such exception happens, it forwards request to error page where user-frienldy
error is presented. 
> It works fine for most of the cases, however, if runtime exception happens during processing
of <jsp:include/> directive, I am getting various exceptions in the log  (depending
on the location of <jsp:include/> with respect to other tags.)
> These exceptions do not appear to cause any harm, however I was curious why are they
happening in the first place. Is it illegal to forward request while processing "include"?
 This is 6.x version of tomcat.
> Exception might look like this:
> Stream closed  org.apache.jasper.runtime.JspWriterImpl.ensureOpen(
> Or like this: 
> Caused by: Stream closed
>                 at org.apache.jasper.runtime.JspWriterImpl.ensureOpen(
>                 at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(
>                 at org.apache.jasper.runtime.PageContextImpl.release(
>                 ... 45 more
> Caused by: Stream closed
>                 at org.apache.jasper.runtime.BodyContentImpl.ensureOpen(
>                 at org.apache.jasper.runtime.BodyContentImpl.write(
>                 at org.apache.jasper.runtime.BodyContentImpl.write(
>                 at org.apache.jsp.WEB_002dINF.jsp.projects_002dtab_002dcontainer_jsp._jspx_meth_stripes_005flayout_002dcomponent_005f1(
>                 at org.apache.jsp.WEB_002dINF.jsp.projects_002dtab_002dcontainer_jsp._jspx_meth_stripes_005flayout_002drender_005f0(
>                 at org.apache
> ---------------------------------------------------------------------
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