Here is the code:

document.resultsentry.action="/servlet/ResultsServlet?sidlist="+idlist+"&qrtr="+qrtr ;

Symptom 1: The address bar is showing everything what it needs to but the content of the page throws the above mentioned error.

Symptom 2: Also, the other way, I tried and gives me request cannot be processed.

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I have done jsp calling servlet or viceversa. It works fine. But the route from js->servlet throws me exception or request not processed.

In JSP, I used to keep action="../servlet/kcasdhjagk?asdhaj=asdbha" and it works.