Matthias Keller created WICKET-4842:
---------------------------------------

             Summary: WicketRuntimeException when Tomcat cleans up a session 
later on
                 Key: WICKET-4842
                 URL: https://issues.apache.org/jira/browse/WICKET-4842
             Project: Wicket
          Issue Type: Bug
    Affects Versions: 1.5.7
            Reporter: Matthias Keller


When I let my tomcat 6 sit around for a couple hours, a session will expire 
after a while.
Exactly 4 hours after the last request, I then get this stacktrace on system 
out:

{quote}
     [exec] 25.10.2012 19:59:08 org.apache.catalina.core.ContainerBase 
backgroundProcess
     [exec] WARNUNG: Exception processing manager 
org.apache.catalina.session.StandardManager@b3f7eb background process
     [exec] org.apache.wicket.WicketRuntimeException: There is no application 
attached to current thread 
ContainerBackgroundProcessor[StandardEngine[Catalina]]
     [exec]     at org.apache.wicket.Application.get(Application.java:231)
     [exec]     at 
org.apache.wicket.protocol.http.AbstractRequestLogger.<init>(AbstractRequestLogger.java:111)
     [exec]     at 
org.apache.wicket.protocol.http.RequestLogger.<init>(RequestLogger.java:45)
     [exec]     at 
org.apache.wicket.Application.newRequestLogger(Application.java:759)
     [exec]     at 
org.apache.wicket.Application.getRequestLogger(Application.java:439)
     [exec]     at 
org.apache.wicket.protocol.http.WebApplication.sessionUnbound(WebApplication.java:511)
     [exec]     at 
org.apache.wicket.session.HttpSessionStore$SessionBindingListener.valueUnbound(HttpSessionStore.java:454)
     [exec]     at 
org.apache.catalina.session.StandardSession.removeAttributeInternal(StandardSession.java:1654)
     [exec]     at 
org.apache.catalina.session.StandardSession.expire(StandardSession.java:756)
     [exec]     at 
org.apache.catalina.session.StandardSession.isValid(StandardSession.java:592)
     [exec]     at 
org.apache.catalina.session.ManagerBase.processExpires(ManagerBase.java:680)
     [exec]     at 
org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:665)
     [exec]     at 
org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1316)
     [exec]     at 
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
     [exec]     at 
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
     [exec]     at 
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
     [exec]     at 
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
     [exec]     at java.lang.Thread.run(Thread.java:662)
{quote}

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