NotSerializableException

[Mary Cole]

 2006-09-26 22:39:35,972 [TP-Processor2] ERROR session.DeltaManager [] - Unable to serialize delta request for sessionid [A2286A35D0B510DFB45DD254C80CD7D9.icentral3]
java.io.NotSerializableException: org.apache.struts.upload.CommonsMultipartRequestHandler$CommonsFormFile
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1081)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at org.apache.catalina.cluster.session.DeltaRequest$AttributeInfo.writeExternal(DeltaRequest.java:346)
at org.apache.catalina.cluster.session.DeltaRequest.writeExternal(DeltaRequest.java:263)
at org.apache.catalina.cluster.session.DeltaManager.unloadDeltaRequest(DeltaManager.java:695)
at org.apache.catalina.cluster.session.DeltaManager.requestCompleted(DeltaManager.java:1249)
at org.apache.catalina.cluster.tcp.ReplicationValve.sendSessionReplicationMessage(ReplicationValve.java:328)
at org.apache.catalina.cluster.tcp.ReplicationValve.invoke(ReplicationValve.java:271)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:754)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:684)
at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:876)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
   

I get this error whenever I upload a file...pls advice how to overcome this

[Brent Sterling]

Looking at your stack trace it appears that your servlet engine (Catalina = Tomcat, correct?) is attempting to duplicate the session between multiple instances using serialization. In the process it finds a CommonsMultipartRequestHandler$CommonsFormFile object that cannot be serialized.

Are you saving your form that contains the FormFile on the session? What if you configured this action to use request scope?

- Brent