JSF managed bean causing java.io.NotSerializableException during Tomcat deployment
deployment, java, jsf, notserializableexception, tomcat
Solution
Here's the relevant bit of the trace:
SCHWERWIEGEND: Exception loading sessions from persistent storage
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.dhbw.stg.wwi2008c.mopro.ui.viewscoped.MachineReservationListBean
...
at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1576)
at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1059)
at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:284)
at org.apache.catalina.session.StandardManager.load(StandardManager.java:204)
at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:465)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140)
...
This one concerns a different problem than the question which you linked. By default, when Tomcat shutdowns, it will serialize the `HttpSession` to disk which will then be reloaded from disk on startup so that the endusers can just continue with the browser session without losing any session data.
In such case, any session attribute is supposed to implement `Serializable`. The JSF view state is by default stored in the session, including all appropriate view scoped beans. They needs to implement `Serializable` as well in order to survive a Tomcat shutdown/restart.
Technically, you can just ignore it. JSF will recreate the session/view scoped beans anyway when not present yet. However, the enduser won't be able to continue with the same session/view scoped data. Those exceptions won't occur when the session doesn't contain any non-serializable objects. That's why it "sometimes" works.
If you want to disable session persistence altogether so that you won't be bothered with those exceptions/warnings, then you need to add a `<Manager>` element with an empty `pathname` attribute to the `<Context>` element of the webapp in question.
<Context ... >
<Manager pathname="" />
</Context>
This basically instructs Tomcat to use no session manager at all.
See also:
- Tomcat 7.0 Configuration Reference - The `Context` container
- java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException
Problem
At deployment of my webApplication on Tomcat 7 I am getting the console output below. After restarting the server twice or three times it works without exceptions. I am using JSF, Tomcat and an RMI connection to businesslogic part (which shouldn't matter here?) @EJB in @ViewScoped managed bean causes java.io.NotSerializableException - Here I read about Serialization. But in that case client side state saving was activated, which is not the case in my webApp (as far as my web.xml tells me). So is serialization of my viewscoped ManagedBeans necessary or is there another failure? Here my startup console output (Sry for that german parts in it): ``` 28.01.2011 20:25:05 org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Programme\Java\jdk1.6.0_21\jre\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Programme/Java/jre6/bin/client;C:/Programme/Java/jre6/bin;C:/Programme/Java/jre6/lib/i386;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Programme\Gemeinsame Dateien\Lenovo;C:\Programme\ATI Technologies\ATI.ACE\Core-Static;C:\Programme\Java\jdk1.6.0_20;C:\StudiPortal\TortoiseSVN\bin;C:\StudiPortal\apache-maven-2.0.11\bin;C:\Programme\Intel\WiFi\bin\;C:\Programme\ThinkPad\ConnectUtilities;C:\Programme\GTK2-Runtime\bin;C:\Programme\OpenVPN\bin 28.01.2011 20:25:05 org.apache.tomcat.util.digester.SetPropertiesRule begin WARNUNG: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:shapeyourbody' did not find a matching property. 28.01.2011 20:25:06 org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on http-8080 28.01.2011 20:25:06 org.apache.coyote.ajp.AjpProtocol init INFO: Initializing Coyote AJP/1.3 on ajp-8009 28.01.2011 20:25:06 org.apache.catalina.startup.Catalina load INFO: Initialization processed in 481 ms 28.01.2011 20:25:06 org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina 28.01.2011 20:25:06 org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.5 28.01.2011 20:25:09 com.sun.faces.config.ConfigureListener contextInitialized INFO: Mojarra 2.0.3 (FCS b03) für Kontext '/shapeyourbody' wird initialisiert. 28.01.2011 20:25:10 com.sun.faces.spi.InjectionProviderFactory createInstance INFO: JSF1048: PostConstruct/PreDestroy-Annotationen vorhanden. Verwaltete Bean-Methoden, die mit diesen Annotationen markiert sind, lassen die entsprechenden Annotationen verarbeiten. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processComponent WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse 'org.apache.myfaces.custom.aliasbean.AliasBeanTagHandler' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processComponent WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse 'org.apache.myfaces.custom.aliasbean.AliasBeansScopeTagHandler' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processComponent WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse 'org.apache.myfaces.custom.calendar.HtmlInputCalendarTagHandler' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processComponent WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse 'org.apache.myfaces.custom.date.HtmlInputDateTagHandler' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processComponent WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse 'org.apache.myfaces.custom.schedule.ScheduleTagHandler' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processComponent WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse 'org.apache.myfaces.custom.tabbedpane.HtmlPanelTabbedPaneTagHandler' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processComponent WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse 'org.apache.myfaces.custom.tree.taglib.TreeTagHandler' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processHandlerClass WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse '[handler-class: null]' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processHandlerClass WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse '[handler-class: null]' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processHandlerClass WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse '[handler-class: null]' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 com.sun.faces.config.processor.FaceletTaglibConfigProcessor processHandlerClass WARNUNG: JSF1029: Die Anwendung hat Version 2.0 (entweder ausdrücklich durch die Version von /WEB-INF/faces-config.xml oder eine fehlende /WEB-INF/faces-confg.xml), jedoch hängt Klasse '[handler-class: null]' von einer Legacy-Facelet-Klasse ab. Das von dieser Klasse registrierte Facelet-Artefakt wird nicht registriert. 28.01.2011 20:25:10 org.apache.catalina.session.StandardManager doLoad SCHWERWIEGEND: IOException while loading persisted sessions: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.dhbw.stg.wwi2008c.mopro.ui.viewscoped.MachineReservationListBean java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.dhbw.stg.wwi2008c.mopro.ui.viewscoped.MachineReservationListBean at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1333) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.util.HashMap.readObject(HashMap.java:1030) 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.invokeReadObject(ObjectStreamClass.java:974) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.util.HashMap.readObject(HashMap.java:1030) 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.invokeReadObject(ObjectStreamClass.java:974) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.util.HashMap.readObject(HashMap.java:1030) 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.invokeReadObject(ObjectStreamClass.java:974) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.util.HashMap.readObject(HashMap.java:1030) 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.invokeReadObject(ObjectStreamClass.java:974) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1576) at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1059) at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:284) at org.apache.catalina.session.StandardManager.load(StandardManager.java:204) at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:465) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5025) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1035) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:738) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1035) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:289) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:442) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:674) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.startup.Catalina.start(Catalina.java:596) 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 org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:303) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:431) Caused by: java.io.NotSerializableException: org.dhbw.stg.wwi2008c.mopro.ui.viewscoped.MachineReservationListBean at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326) at java.util.HashMap.writeObject(HashMap.java:1001) 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.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.writeArray(ObjectOutputStream.java:1338) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326) at java.util.HashMap.writeObject(HashMap.java:1001) 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.writeArray(ObjectOutputStream.java:1338) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326) at java.util.HashMap.writeObject(HashMap.java:1001) 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 java.util.HashMap.writeObject(HashMap.java:1001) 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:1652) at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:1076) at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:406) at org.apache.catalina.session.StandardManager.unload(StandardManager.java:353) at org.apache.catalina.session.StandardManager.stopInternal(StandardManager.java:492) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:216) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5195) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:216) at org.apache.catalina.core.ContainerBase.stopInternal(ContainerBase.java:1074) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:216) at org.apache.catalina.core.ContainerBase.stopInternal(ContainerBase.java:1074) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:216) at org.apache.catalina.core.StandardService.stopInternal(StandardService.java:498) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:216) at org.apache.catalina.core.StandardServer.stopInternal(StandardServer.java:695) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:216) at org.apache.catalina.startup.Catalina.stop(Catalina.java:663) at org.apache.catalina.startup.Catalina.start(Catalina.java:630) ... 6 more 28.01.2011 20:25:10 org.apache.catalina.session.StandardManager startInternal SCHWERWIEGEND: Exception loading sessions from persistent storage java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.dhbw.stg.wwi2008c.mopro.ui.viewscoped.MachineReservationListBean at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1333) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.util.HashMap.readObject(HashMap.java:1030) 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.invokeReadObject(ObjectStreamClass.java:974) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.util.HashMap.readObject(HashMap.java:1030) 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.invokeReadObject(ObjectStreamClass.java:974) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.util.HashMap.readObject(HashMap.java:1030) 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.invokeReadObject(ObjectStreamClass.java:974) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.util.HashMap.readObject(HashMap.java:1030) 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.invokeReadObject(ObjectStreamClass.java:974) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1576) at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1059) at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:284) at org.apache.catalina.session.StandardManager.load(StandardManager.java:204) at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:465) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5025) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1035) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:738) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1035) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:289) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:442) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:674) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) at org.apache.catalina.startup.Catalina.start(Catalina.java:596) 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 org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:303) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:431) Caused by: java.io.NotSerializableException: org.dhbw.stg.wwi2008c.mopro.ui.viewscoped.MachineReservationListBean at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326) at java.util.HashMap.writeObject(HashMap.java:1001) 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.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.writeArray(ObjectOutputStream.java:1338) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326) at java.util.HashMap.writeObject(HashMap.java:1001) 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.writeArray(ObjectOutputStream.java:1338) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326) at java.util.HashMap.writeObject(HashMap.java:1001) 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) ... 6 more 28.01.2011 20:25:11 org.apache.coyote.http11.Http11Protocol start INFO: Starting Coyote HTTP/1.1 on http-8080 28.01.2011 20:25:11 org.apache.coyote.ajp.AjpProtocol start INFO: Starting Coyote AJP/1.3 on ajp-8009 28.01.2011 20:25:11 org.apache.catalina.startup.Catalina start INFO: Server startup in 4976 ms ``` Thank you for your help