When session expires in my JSP i am getting following error.

I am using Struts Nested tags and validator framework.
I am always using the collection in my actionform with Present,Empty tags
always in my JSP.


<nested:present name="testActionForm" scope="session">
<nested:notEmpty  name="testActionForm"  property="arlCollectionBeanData" >

Experts,please share your comments..!!



06/07/08 11:55:24 test: Servlet error
java.lang.IndexOutOfBoundsException: Index: 4, Size: 0
        at java.util.ArrayList.RangeCheck(Unknown Source)
        at java.util.ArrayList.get(Unknown Source)
        at
org.apache.commons.beanutils.PropertyUtilsBean.getIndexedProperty(PropertyUt
ilsBean.java:433)
        at
org.apache.commons.beanutils.PropertyUtilsBean.getIndexedProperty(PropertyUt
ilsBean.java:340)
        at
org.apache.commons.beanutils.PropertyUtilsBean.getNestedProperty(PropertyUti
lsBean.java:684)
        at
org.apache.commons.beanutils.PropertyUtilsBean.getProperty(PropertyUtilsBean
.java:715)
        at
org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:88
4)
        at
org.apache.commons.beanutils.BeanUtilsBean.populate(BeanUtilsBean.java:811)
        at org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:298)
        at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:493)
        at
org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.j
ava:804)
        at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203)
        at 
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.0.0)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispa
tcher.java:765)
        at com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.0.0)].server.http.ServletRequestDispatcher.forwardInternal(ServletReq
uestDispatcher.java:317)
        at com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.0.0)].server.http.HttpRequestHandler.processRequest(HttpRequestHandle
r.java:790)
        at com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.0.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:270)
        at com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.0.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)
        at com.evermind[Oracle Application Server Containers for J2EE 10g
(9.0.4.0.0)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableRe
sourcePooledExecutor.java:186)
        at java.lang.Thread.run(Unknown Source)


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