ViewExpiredException - Session not expired yet

We are getting ViewExpiredException in our application which is based on SEAM framework... It is using Mojara implementation of JSF (version 1.2_12) ...

Issues comes only few times during few form submission events and not able to reproduce at all. Below is the log extracted.

Session Available, but View State does not exist for viewId: /consultation/survey/view.xhtml

Session is not expired which we can see from above statement and I have observed as well. Tried increasing numberoflogicalviews and enable11compatibility parameters but still not working.

Please refer to full log below..

2011-12-12 15:10:06,217 FINE [javax.enterprise.resource.webcontainer.jsf.lifecycle] (ajp-0.0.0.0-8009-1) Entering RestoreViewPhase
2011-12-12 15:10:06,217 FINE [javax.enterprise.resource.webcontainer.jsf.application] (ajp-0.0.0.0-8009-1) servletPath /consultation/survey/view.html
2011-12-12 15:10:06,217 FINE [javax.enterprise.resource.webcontainer.jsf.application] (ajp-0.0.0.0-8009-1) pathInfo null
2011-12-12 15:10:06,217 FINE [javax.enterprise.resource.webcontainer.jsf.application] (ajp-0.0.0.0-8009-1) URL pattern of the FacesServlet executing the current request .html
2011-12-12 15:10:06,217 FINE [javax.enterprise.resource.webcontainer.jsf.application] (ajp-0.0.0.0-8009-1) viewId after appending the context suffix /consultation/survey/view.xhtml
2011-12-12 15:10:06,217 FINE [javax.enterprise.resource.webcontainer.jsf.application] (ajp-0.0.0.0-8009-1) Begin restoring view in session for viewId /consultation/survey/view.xhtml
2011-12-12 15:10:06,217 FINE [javax.enterprise.resource.webcontainer.jsf.application] (ajp-0.0.0.0-8009-1) Session Available, but View State does not exist for viewId: /consultation/survey/view.xhtml
2011-12-12 15:10:06,358 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/gi].[Faces Servlet]] (ajp-0.0.0.0-8009-1) Servlet.service() for servlet Faces Servlet threw exception
javax.faces.application.ViewExpiredException: viewId:/consultation/survey/view.html - View /consultation/survey/view.html could not be restored.
at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:185)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:103)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:444)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:382)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:310)
at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at au.gov.qld.ssq.gi.web.filter.ErrorCatchFilter.doFilter(ErrorCatchFilter.java:83)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:42)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:436)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:384)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)

Did you replaced any code of you application?
May your server did not a hot replace and reboted your app.

No code is replaced. This issue is coming on 3 different environments and there is no specific scenario when it comes. Application is used by public users (forms) so could it be related to client browser? Need to understand what makes view expire .... Can you guide?

Did you try increasing "numberOfViewsInSession"? Not the logical views. Are you getting this issue when you are using same managed bean for a number of pages, something like in a wizard?

default value is 15 and we have tried increasing it to 50. Can you suggest ideal value for this attribute? Web application has number of forms and it is public site being accessed by general public as well as government employees.