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  1. ,

    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

  2. ,
    via Stack Overflow by Matthias

    Your object contains member variables which are themselves not serializable 'ReportDataStoreRegion'. If you really want to serialize your object. One option would be to declare the variable as transient so that it is not serialized.

Solutions on the web

via Icesoft by alexander.dallmann, 1 year ago
Could not serialize flow execution; make sure all objects stored in flow or flash scope are serializable
via Spring JIRA by Mauricio Noda, 1 year ago
Could not serialize flow execution; make sure all objects stored in flow or flash scope are serializable
via Spring JIRA by Mauricio Noda, 2 years ago
Could not serialize flow execution; make sure all objects stored in flow or flash scope are serializable
via Spring JIRA by Mauricio Noda, 2 years ago
Could not serialize flow execution; make sure all objects stored in flow or flash scope are serializable
via Spring JIRA by Mauricio Noda, 1 year ago
Could not serialize flow execution; make sure all objects stored in flow or flash scope are serializable
via Stack Overflow by user656449
, 1 year ago
Could not serialize flow execution; make sure all objects stored in flow or flash scope are serializable
java.io.NotSerializableException: com.icesoft.faces.component.inputfile.FileInfo	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1338)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1146)	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 java.util.HashMap.writeObject(HashMap.java:1001)	at sun.reflect.GeneratedMethodAccessor23.invoke(Unknown Source)	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.defaultWriteObject(ObjectOutputStream.java:416)	at org.springframework.webflow.core.collection.LocalAttributeMap.writeObject(LocalAttributeMap.java:327)	at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)	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.GeneratedMethodAccessor23.invoke(Unknown Source)	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.defaultWriteObject(ObjectOutputStream.java:416)	at org.springframework.webflow.core.collection.LocalAttributeMap.writeObject(LocalAttributeMap.java:327)	at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)	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.springframework.webflow.engine.impl.FlowSessionImpl.writeExternal(FlowSessionImpl.java:154)	at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1421)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1390)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)	at java.util.LinkedList.writeObject(LinkedList.java:943)	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.springframework.webflow.engine.impl.FlowExecutionImpl.writeExternal(FlowExecutionImpl.java:508)	at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1421)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1390)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)	at org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshot.serialize(SerializedFlowExecutionSnapshot.java:172)	at org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshot.(SerializedFlowExecutionSnapshot.java:69)	at org.springframework.webflow.execution.repository.snapshot.SerializedFlowExecutionSnapshotFactory.createSnapshot(SerializedFlowExecutionSnapshotFactory.java:70)	at org.springframework.webflow.execution.repository.snapshot.AbstractSnapshottingFlowExecutionRepository.snapshot(AbstractSnapshottingFlowExecutionRepository.java:75)	at org.springframework.webflow.execution.repository.impl.DefaultFlowExecutionRepository.putFlowExecution(DefaultFlowExecutionRepository.java:115)	at org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:155)	at com.icesoft.faces.webapp.http.core.SwfLifecycleExecutor.apply(SwfLifecycleExecutor.java:42)	at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle(ReceiveSendUpdates.java:54)	at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service(ReceiveSendUpdates.java:42)	at com.icesoft.faces.webapp.http.core.ViewBoundServer.service(ViewBoundServer.java:65)	at com.icesoft.faces.webapp.http.core.RequestVerifier.service(RequestVerifier.java:44)	at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer$Matcher.serviceOnMatch(PathDispatcherServer.java:50)	at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:19)	at com.icesoft.faces.webapp.http.servlet.ThreadBlockingAdaptingServlet.service(ThreadBlockingAdaptingServlet.java:19)	at com.icesoft.faces.webapp.http.servlet.EnvironmentAdaptingServlet.service(EnvironmentAdaptingServlet.java:63)	at com.icesoft.faces.webapp.http.servlet.MainSessionBoundServlet.service(MainSessionBoundServlet.java:139)	at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:53)	at com.icesoft.faces.webapp.http.servlet.PathDispatcher$Matcher.serviceOnMatch(PathDispatcher.java:52)	at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:29)	at com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:82)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)	at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:46)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)	at java.lang.Thread.run(Thread.java:619)