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request.getQueryString() doesn't work ?

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I have a servlet "MyServlet" which has a "forward(req, res)" to a JSP page. Now in my destination JSP page I want to get the information of the servlet's query string part.
For example, if request is http://host/my-app/servlet/MyServlet?param=abc¶m2=aaa"
then I want to see "param=abc¶m2=aaa" from JSP by using request.getQueryString(). However, this worked well with Older version of JRun, but not with JRun 3.1. When I used JRun 3.1 this returns null.
Does anybody have such experience ?
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Verify that you did override doGet in your code.
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