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Editorial Team
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Asked: 2026-06-10T04:24:49+00:00

How can I prevent any exceptions occurring to be displayed to the user? I

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How can I prevent any exceptions occurring to be displayed to the user?
I could instead imagine to just redirect the user to a specific page if any error occures.

Especially I want to prevent HTTP Status 500 view exceptions like this:

javax.faces.application.ViewExpiredException: /index.xhtmlNo saved view state could be found for the view identifier: /index.xhtml
    at org.apache.myfaces.lifecycle.RestoreViewExecutor.execute(RestoreViewExecutor.java:132)
    at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:170)
    at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
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1 Answer

  1. Editorial Team

    Why not define custom error pages in your web.xml? You can specify HTTP error codes as in:

    <error-page>
    <error-code>500</error-code>
    <location>/myerror.jsp</location>
</error-page>

    …or Java exception classes:

    <error-page>
    <exception-type>java.lang.Throwable</exception-type>
    <location>/myerror.jsp</location>
</error-page>

    This solution has the advantage of not requiring any extra implementation – except for the error page itself.

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