Hello.
When
<c:set var="foo" value="bar" scope="application"/>
<% session.invalidate(); %>
The value of foo is: ${foo}
, Tomcat 5.0.16 throws following exception.
java.lang.IllegalStateException: getAttribute: ?????????????????
org.apache.catalina.session.StandardSession.getAttribute
(StandardSession.java:985)
org.apache.catalina.session.StandardSessionFacade.
getAttribute(StandardSessionFacade.java:156)
org.apache.jasper.runtime.PageContextImpl.
doFindAttribute(PageContextImpl.java:514)
org.apache.jasper.runtime.PageContextImpl.findAttribute
(PageContextImpl.java:499)
org.apache.commons.el.VariableResolverImpl.
resolveVariable(VariableResolverImpl.java:157)
org.apache.jasper.runtime.PageContextImpl.
resolveVariable(PageContextImpl.java:875)
org.apache.commons.el.NamedValue.evaluate(NamedValue.java:124)
org.apache.commons.el.BinaryOperatorExpression.evaluate
(BinaryOperatorExpression.java:154)
org.apache.commons.el.ExpressionEvaluatorImpl.evaluate
(ExpressionEvaluatorImpl.java:263)
org.apache.commons.el.ExpressionEvaluatorImpl.evaluate
(ExpressionEvaluatorImpl.java:190)
org.apache.jasper.runtime.PageContextImpl.
proprietaryEvaluate(PageContextImpl.java:941)
org.apache.jsp.register_jsp._jspx_meth_c_if_1(register_
jsp.java:372)
org.apache.jsp.register_jsp._jspService(register_jsp.java:120)
org.apache.jasper.runtime.HttpJspBase.service
(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service
(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.
java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:
856)
The stack trace shows that,
org.apache.commons.el.VariableResolverImpl searches for the
variable named "foo" in each of the scopes, even if the session
is invalidated.
To avoid this problem,
<c:set var="foo" value="bar" scope="application"/>
<% session.invalidate(); %>
The value of foo is: ${applicationScope.foo}
.
But I don't like this manner.
Then, how can I invalidate session safely?
Any suggestion or any English correction helps me.
--
ASARI Takashi
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