Filter exception

javax.servlet.ServletException: Paperless: Loan application has timed out. Please begin again from the http link in your email.
	at au.com.hunter.efund.ui.UserSession.getUserSession(UserSession.java:565)
	at au.com.hunter.efund.ui.UserSession.getUserSession(UserSession.java:432)
	at au.com.hunter.efund.ui.UserSession.getUniqueUserSession(UserSession.java:513)
	at au.com.hunter.efund.ui.servlet.LogonFilter.doFilter(LogonFilter.java:49)
	at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
	at au.com.hunter.efund.ui.servlet.UserSessionCheckFilter.doFilter(UserSessionCheckFilter.java:48)
	at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
	at au.com.hunter.efund.ui.servlet.SecurityFilter.doFilter(SecurityFilter.java:45)
	at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
	at au.com.hunter.efund.ui.servlet.SecurityHeaderFilter.doFilter(SecurityHeaderFilter.java:41)
	at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
	at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)
	at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
	at au.com.hunter.efund.ui.servlet.AppScanHttpInputFilter.doFilter(AppScanHttpInputFilter.java:173)
	at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:967)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1107)
	at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87)
	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:952)
	at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1817)
	at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:213)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:463)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:530)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:316)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:287)
	at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
	at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
	at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)
	at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
	at com.ibm.io.async.AsyncChannelFuture$1.run(AsyncChannelFuture.java:205)
	at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1892)