4.2: proper shutdown of Jahia

Sometimes, after some use and tests of my 4.2, my Jahia 4.2 does not correctly and properly shutdown. If I just restart and suhdown this works fine. I did not had the time to coyp/paste the rror before my console closes but in my log file I have:

2007-04-05 10:32:46 StandardHost[localhost]: Retrait de l'application web pour le chemin de contexte
2007-04-05 10:32:46 StandardHost[localhost]: Retrait de l'application web pour le chemin de contexte /manager
2007-04-05 10:32:46 StandardHost[localhost]: Retrait de l'application web pour le chemin de contexte /infonews-4.0_myjahiasite
2007-04-05 10:32:48 StandardHost[localhost]: Retrait de l'application web pour le chemin de contexte /webdav
2007-04-05 10:32:48 StandardHost[localhost]: Retrait de l'application web pour le chemin de contexte /examples
2007-04-05 10:32:48 StandardHost[localhost]: Retrait de l'application web pour le chemin de contexte /jahia
2007-04-05 10:32:48 StandardManager[/jahia] Impossible de sérialiser l'attribut de session jahia_session_engineMap pour la session E0548BDA20162CC5744FB82DA12BEABC
java.io.NotSerializableException: java.util.Vector$1
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at java.util.HashMap.writeObject(HashMap.java:1000)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1429)
at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:852)
at org.apache.catalina.session.StandardManager.unload(StandardManager.java:489)
at org.apache.catalina.session.StandardManager.stop(StandardManager.java:644)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:3625)
at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:989)
at org.apache.catalina.core.StandardHostDeployer.remove(StandardHostDeployer.java:423)
at org.apache.catalina.core.StandardHost.remove(StandardHost.java:821)
at org.apache.catalina.startup.HostConfig.undeployApps(HostConfig.java:711)
at org.apache.catalina.startup.HostConfig.stop(HostConfig.java:691)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:313)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1174)
at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1186)
at org.apache.catalina.core.StandardService.stop(StandardService.java:507)
at org.apache.catalina.core.StandardServer.stop(StandardServer.java:2178)
at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:575)

2007-04-05 10:32:48 StandardManager[/jahia] Impossible de sérialiser l'attribut de session jahiaEngineViewHelper pour la session E0548BDA20162CC5744FB82DA12BEABC
java.io.NotSerializableException: org.jahia.services.version.PageRevisionsCompositor
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1429)
at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:852)
at org.apache.catalina.session.StandardManager.unload(StandardManager.java:489)
at org.apache.catalina.session.StandardManager.stop(StandardManager.java:644)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:3625)
at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:989)
at org.apache.catalina.core.StandardHostDeployer.remove(StandardHostDeployer.java:423)
at org.apache.catalina.core.StandardHost.remove(StandardHost.java:821)
at org.apache.catalina.startup.HostConfig.undeployApps(HostConfig.java:711)
at org.apache.catalina.startup.HostConfig.stop(HostConfig.java:691)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:313)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1174)
at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1186)
at org.apache.catalina.core.StandardService.stop(StandardService.java:507)
at org.apache.catalina.core.StandardServer.stop(StandardServer.java:2178)
at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:575)

2007-04-05 10:32:48 StandardHost[localhost]: Retrait de l'application web pour le chemin de contexte /admin

Perhaps something related to this....