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Steps to Reproduce:

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Deploy FWTest.war and open http://localhost:8080/FWTest/fwd.jsp?init=true

Compare the results in WFLY 28 and WFLY 27, inspect the output of the JSP and the server system out log.

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Deploy FWTest.war and open http://localhost:8080/FWTest/fwd.jsp?init=true Compare the results in WFLY 28 and WFLY 27, inspect the output of the JSP and the server system out log.
[QE] How to address?:
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[QE] Why QE missed?:
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Since WFLY Version 28.0.0, request parameters are lost, if they are set between multiple forwards. But they should be aggregated.

For example

jsp1?init=true (forward to) jsp2?param1=lost (forward to) jsp3?param2=here

Results in the following parameters:
init=true, param2=here

But should be
init=true, param1=lost, param2=here

The forward is done with
request.getRequestDispatcher("...").forward(request, response)

is cloned by

JBEAP-25220 (8.0.z) UNDERTOW-2285 - Request parameters lost via jsp:include chain

split to

UNDERTOW-2269 Encode Query string on forward/include and properly handle merging