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    Exception in thread "main" java.io.NotSerializableException: java.util.Hashtable$Enumerator at java.io.ObjectOutputStream.writeObject0(Unknown Source) at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) at java.io.ObjectOutputStream.writeSe

Solutions on the web

via Apache's JIRA Issue Tracker by Dan Haywood, 1 year ago
The object type is not Serializable! A problem occurred while checking object with type: org.apache.wicket.RequestListenerInterface Field hierarchy is: 9 [class=org.apache.isis.viewer.wicket.ui.pages.error.ErrorPage, path=9] private
via Stack Overflow by D2Gambit
, 2 years ago
The object type is not Serializable! A problem occurred while checking object with type: com.riot.itemsets.dao.ProGamesDaoJdbc Field hierarchy is: 0 [class=com.riot.itemsets.HomePage, path=0] private java.lang.Object
via GitHub by Patrick1701
, 1 year ago
A component without a parent is detected. A problem occurred while checking object with type: org.apache.wicket.markup.html.basic.Label Field hierarchy is: 9 [class=de.xyz.MyPage, path=9] private java.lang.Object
via nabble.com by Unknown author, 1 year ago
The object type is not Serializable! A problem occurred while checking object with type: com.arch.example.Country Field hierarchy is:   0 [class=com.arch.example.HomePage, path=0]     private com.arch.example.Country com.arch.example.HomePage.country [class=com.arch.example.Country] <----- field that is causing the problem
via Stack Overflow by Asha Joshi
, 1 year ago
The object type is not Serializable! A problem occurred while checking object with type: java.util.concurrent.ScheduledThreadPoolExecutor private final java.util.concurrent.ScheduledExecutorService Test.scheduler [class=java.util.concurrent.ScheduledThreadPoolExecutor] <----- field that is causing the problem
via GitHub by dmbeer
, 2 years ago
The object type is not Serializable! A problem occurred while checking object with type: de.agilecoders.wicket.core.markup.html.bootstrap.form.ControlGroup$FeedbackMessageToCssClassNameTransformer Field hierarchy is: 1 [class
java.io.NotSerializableException: org.apache.wicket.RequestListenerInterface	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1181)	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1541)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1506)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1541)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1506)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1541)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1506)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1375)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1171)	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1541)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1506)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1375)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1171)	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1541)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1506)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)	at org.apache.wicket.serialize.java.JavaSerializer$SerializationCheckerObjectOutputStream.writeObjectOverride(JavaSerializer.java:260)	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:343)	at org.apache.wicket.serialize.java.JavaSerializer.serialize(JavaSerializer.java:78)	at org.apache.wicket.pageStore.DefaultPageStore.serializePage(DefaultPageStore.java:376)	at org.apache.wicket.pageStore.DefaultPageStore.storePage(DefaultPageStore.java:150)	at org.apache.wicket.page.PageStoreManager$PersistentRequestAdapter.storeTouchedPages(PageStoreManager.java:410)	at org.apache.wicket.page.RequestAdapter.commitRequest(RequestAdapter.java:181)	at org.apache.wicket.page.AbstractPageManager.commitRequest(AbstractPageManager.java:98)	at org.apache.wicket.page.PageManagerDecorator.commitRequest(PageManagerDecorator.java:73)	at org.apache.wicket.page.PageAccessSynchronizer$2.commitRequest(PageAccessSynchronizer.java:258)	at org.apache.wicket.Application$2.onDetach(Application.java:1628)	at org.apache.wicket.request.cycle.RequestCycleListenerCollection$3.notify(RequestCycleListenerCollection.java:105)	at org.apache.wicket.request.cycle.RequestCycleListenerCollection$3.notify(RequestCycleListenerCollection.java:101)	at org.apache.wicket.util.listener.ListenerCollection$1.notify(ListenerCollection.java:120)	at org.apache.wicket.util.listener.ListenerCollection.reversedNotify(ListenerCollection.java:144)	at org.apache.wicket.util.listener.ListenerCollection.reversedNotifyIgnoringExceptions(ListenerCollection.java:113)	at org.apache.wicket.request.cycle.RequestCycleListenerCollection.onDetach(RequestCycleListenerCollection.java:100)	at org.apache.wicket.request.cycle.RequestCycle.onDetach(RequestCycle.java:640)	at org.apache.wicket.request.cycle.RequestCycle.detach(RequestCycle.java:589)	at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:293)	at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)	at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)	at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)	at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)	at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)	at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)	at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)	at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:724)