Servlet Specification 2.4
SRV.9.9.2 Error Pages
1.Error-page declarations using the exception-type element in the deployment
descriptor must be unique up to the class name of the exception-type. Similarly,
error-page declarations using the status-code element must be unique in the
deployment descriptor up to the status code.
2.The error page mechanism described does not intervene when errors occur
when invoked using the RequestDispatcher or filter.doFilter method. In this
way, a fillter or servlet using the RequestDispatcher has the opportunity to handle
errors generated.
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SRV.8.1.1 Query Strings in Request Dispatcher Paths
3.Parameters specifed in the query string used to create the RequestDispatcher
take precedence over other parameters of the same name passed to the included
servlet. The parameters associated with a RequestDispatcher are scoped to apply
only for the duration of the include or forward call.
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Q1.Please explain what does the text in bold means "Unique up to the class name,Unique up to the status code" in the first statement.
Q2. What does " error page mechanism described does not intervene when errors occur
when invoked using the RequestDispatcher or filter.doFilter method" means ?
Q3.Can anyone provide an example for the third statement