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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 36150] New: - Redirects requred when transitioning between RDC pages using Websphere 6.0.2
Date Thu, 11 Aug 2005 19:47:05 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=36150

           Summary: Redirects requred when transitioning between RDC pages
                    using Websphere 6.0.2
           Product: Taglibs
           Version: 1.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P1
         Component: RDC Taglib
        AssignedTo: taglibs-dev@jakarta.apache.org
        ReportedBy: srobertson@nvisia.com
                CC: srobertson@nvisia.com


Here are the steps to reproduce the error, using Struts (though the issue is not
struts-specific):

* Voice browser submits back to JSP 1 when input matches the grammar in the RDC.
 The RDC now has correct input, and an rdc:struts tag forwards to Struts action 1.

* Struts action 1 does whatever it needs to in response to the input, then
forwards to Struts action 2 for the next page/step.

* Struts action 2 forwards to the JSP for step 2.

Expected behavior:

The second JSP renders and the voice browser correctly interprets the second
page and its RDC.  (Note, if the voice browser is pointed directly to page 2,
this page functions correctly).

Actual behavior:

The voice interpreter (one provided in IBM Voice Toolkit 6.0) complains that
"Msg   : The markup in the document following the root element must be well-formed."

Additional details (current workaround we are using):

Using redirects to transition between JSP pages fixes the symptoms.  In the
above example, if Struts action 1 redirects to Struts action 2 (so the voice
interpreter issues a new request for the next page) the symptoms disappear and
the application works properly.

I believe this is due to JspWriter buffer flushing issues, where content from
the partial rendering of Jsp 1 is not properly cleared before the rendering of
Jsp 2.  Looking over the JSP 2.0 specification, section 5.5 (page 1-111) states
that when using jsp:forward, any buffered content must be flushed by the
container prior to forwarding the request.  I was not able to find a similar
requirement for the use of RequestDispatcher.forward, which is what
rdc:struts-submit uses.

I don't know if this is a bug in WebSphere 6.0, and error I am making, or if
this basic usage pattern in RDCs is not compatible with the specification.  I've
created a simple example case to demonstrate the problem, and will try to attach
it to this report.  It's 3.6 Megs, so if that's too big, I'll have to find some
other way to submit it.

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