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Editorial Team
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Asked: 2026-05-22T17:14:37+00:00

How can I check in an error page whether the session was timed out?

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How can I check in an error page whether the session was timed out?

I have tried

<c:choose>
    <c:when test="${empty pageContext.request.session}">
        //do smth
    </c:when>
    <c:otherwise>
        //do smth
    </c:otherwise>
</c:choose>

but it doesn’t work.

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1 Answer

  1. Editorial Team

    There is really no reliable way to detect that. You could fiddle with some session based token as request parameter in all links/forms and validate it in the filter, but that’s fully spoofable and not really SEO friendly.

    Best what you could do is to add a <meta http-equiv="refresh"> tag to the <head> of the master template which redirects the page to the session timeout error page automatically whenever the session is expired. Since you’re using a shared error page, you could pass the condition as a request parameter:

    <meta http-equiv="refresh" content="${pageContext.session.maxInactiveInterval};url=error.jsp?type=timeout" />

    and check it in the error.jsp as follows:

    <c:choose>
    <c:when test="${param.type == 'timeout'}">
        <p>Your session has been timed out.</p>
    </c:when>
    <c:otherwise>
        <!-- Handle default case here. -->
    </c:otherwise>
</c:choose>

    Oh, yes, ${pageContext.session} is legitimately valid. The ${pageContext.request.session} is just an unnecessary detour. Check the PageContext javadoc for all available getters.

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