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Handling Exception/Runtime Exception in JSF

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Any good pointers to documents describing proper error handling.

Not just navigation rules to an error.jsp file but also handling of runtime exceptions and exceptions in backing beans where you cannot use navigation rules (calling a method from JSF EL etc.).

I am developing jsr 168 portlets using jsf on websphere portal.

I can't get the error handling via web.xml to function and other places I can't manually make it go to an error.jsp in case of exceptions.
How to handle the runtime exception in JSF.

1. By including following tags in web.xml

its not working.

2. If include the
<%@page errorPage="../error/GenericError.jsp" %>
in jsp page then
it is not forwading to error page giving asaertion failure exception

If we change the GenericError.jsp tag like


then it is going to error page but the
action inside the error page is not getting called its backing bean

Here is code of error.jsp

<%-- jsf:pagecode language="java" location="/JavaSource/pagecode/JSPs/" --%><%-- /jsf:pagecode --%>
<%@taglib uri=""; prefix="f"%>
<%@taglib uri=""; prefix="portlet"%>
<%@taglib uri=""; prefix="h"%>
<%@ page isErrorPage="true" %>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

<div class="errorMessage"><%= exception.getLocalizedMessage() %></div>
<f:subview id="name">
<h:commandButton action="#{OSPMTASecurityBean.cancel}" value="submit"/>

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I am also developing portlets. Check this entry for some alternatives:
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