DO NOT REPLY [Bug 19111] New: - Response being committed on forward to error page

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=19111

Response being committed on forward to error page

           Summary: Response being committed on forward to error page
           Product: Tomcat 4
           Version: 4.1.18
          Platform: Sun
        OS/Version: OS/2
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Unknown
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: andy@mediasurface.com


When Tomcat forwards to an error page, it seems to flush the output buffer even 
if the buffer is not full. If the page is less than about 8K, it works fine: 
the error is thrown, Tomcat fowards to the error page, the buffer is not 
flushed, and the response is not committed.

The first JSP below sets the buffer size to 50k and then outputs 10000 
characters. It then throws an error, which gets forwarded to the second JSP. By 
the time the second JSP picks up, Tomcat has flushed the buffer.

Change the value in the for loop to about 8000 and Tomcat is OK.

SO it looks like Tomcat always flushes the output buffer at around 8k, rather 
than the size of the buffer as set by response.setBufferSize().


1.jsp:

<%@ page errorPage="2.jsp" %>

Test committing/flushing

<%
        response.setBufferSize(50*1024);

        for (int i=0; i<10000 ; i++)
        {
                out.print(".");
        }
         
        if (true)
        {        
                log ("About to throw. commited = " + response.isCommitted());
                throw new Exception();
        }
%>



2.jsp:

<%@ page isErrorPage="true" %>

In error page
<br>
commit = <%= response.isCommitted() %>

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