Caused by: java.lang.ClassCastException: com.vaadin.server.VaadinSession cannot be cast to java.lang.String at org.jboss.marshalling.ModularClassResolver.resolveClass(ModularClassResolver.java:99) at org.jboss.marshalling.river.RiverUnmarshaller.doReadClassDescriptor(RiverUnmarshaller.java:921) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:310) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209) at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1712) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1628) at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1269) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:272) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209) at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1712) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1628) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1591) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1591) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1591) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1591) at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1269) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:272) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209) at org.jboss.marshalling.river.RiverUnmarshaller.doReadMapObject(RiverUnmarshaller.java:195) at org.jboss.marshalling.river.RiverUnmarshaller.readMapData(RiverUnmarshaller.java:819) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:682) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209) at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1712) at org.jboss.marshalling.river.RiverObjectInputStream.defaultReadObject(RiverObjectInputStream.java:81) at com.vaadin.ui.ConnectorTracker.readObject(ConnectorTracker.java:652) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_05] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_05] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_05] at java.lang.reflect.Method.invoke(Method.java:483) [rt.jar:1.8.0_05] at org.jboss.marshalling.reflect.SerializableClass.callReadObject(SerializableClass.java:307) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1608) at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1269) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:272) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209) at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1712) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1628) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1591) at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1269) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:272) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209) at org.jboss.marshalling.river.RiverUnmarshaller.doReadMapObject(RiverUnmarshaller.java:195) at org.jboss.marshalling.river.RiverUnmarshaller.readMapData(RiverUnmarshaller.java:819) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:682) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209) at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1712) at org.jboss.marshalling.river.RiverObjectInputStream.defaultReadObject(RiverObjectInputStream.java:81) at com.vaadin.server.VaadinSession.readObject(VaadinSession.java:1436) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_05] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_05] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_05] at java.lang.reflect.Method.invoke(Method.java:483) [rt.jar:1.8.0_05] at org.jboss.marshalling.reflect.SerializableClass.callReadObject(SerializableClass.java:307) at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1615) at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1269) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:272) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209) at org.jboss.marshalling.river.RiverUnmarshaller.doReadMapObject(RiverUnmarshaller.java:195) at org.jboss.marshalling.river.RiverUnmarshaller.readMapData(RiverUnmarshaller.java:819) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:682) at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209) at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:41) at org.jboss.as.clustering.marshalling.SimpleMarshalledValue.get(SimpleMarshalledValue.java:101) at org.jboss.as.clustering.marshalling.SimpleMarshalledValue.get(SimpleMarshalledValue.java:45) at org.wildfly.clustering.web.infinispan.session.MarshalledValueSessionAttributeMarshaller.read(MarshalledValueSessionAttributeMarshaller.java:46) at org.wildfly.clustering.web.infinispan.session.MarshalledValueSessionAttributeMarshaller.read(MarshalledValueSessionAttributeMarshaller.java:33) at org.wildfly.clustering.web.infinispan.session.coarse.CoarseImmutableSessionAttributes.getAttributes(CoarseImmutableSessionAttributes.java:46) at org.wildfly.clustering.web.infinispan.session.coarse.CoarseImmutableSessionAttributes.getAttributeNames(CoarseImmutableSessionAttributes.java:51) at org.wildfly.clustering.web.infinispan.session.InfinispanSessionManager.findListeners(InfinispanSessionManager.java:320) at org.wildfly.clustering.web.infinispan.session.InfinispanSessionManager.triggerPostActivationEvents(InfinispanSessionManager.java:309) at org.wildfly.clustering.web.infinispan.session.InfinispanSessionManager.activated(InfinispanSessionManager.java:211) at sun.reflect.GeneratedMethodAccessor39.invoke(Unknown Source) [:1.8.0_05] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_05] at java.lang.reflect.Method.invoke(Method.java:483) [rt.jar:1.8.0_05] at org.infinispan.notifications.AbstractListenerImpl$ListenerInvocation$1.run(AbstractListenerImpl.java:207) ... 62 more Caused by: an exception which occurred: in field contentDescription in object of type com.vaadin.shared.ui.window.WindowState in field sharedState in object of type com.vaadin.ui.Window in map value at index [3] of size [6] in field connectorIdToConnector in object of type com.vaadin.ui.ConnectorTracker in field connectorTracker in object of type si.telekom.vaadin.MyVaadinUI in map value at index [0] of size [1] in field uIs in object of type com.vaadin.server.VaadinSession in map value at index [0] of size [2]