Thanks to all that replied. Indeed a reference to the HttpServletRequest is held in my Struts form (session-scope). The problem went away once I added transient to the attribute.
My concern is when the session is replicated to other tomcat instances, will a call to getRequest() always return null? - Jim -----Original Message----- From: Filip Hanik - Dev Lists [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 01, 2005 11:47 PM To: Tomcat Users List Subject: Re: Tomcat clustering and NotSerializableException As Richard says, don't store your request in the session, not a good idea. Richard Mixon (qwest) wrote: >CoyoteRequestFacade is the first element in the stack trace - it is not >the session stored object that is causing the NotSerializableException. > >As I said in my prior posting, to resolve this issue you need to: > >1) Identify each object that you are explicitly storing in the session >and make sure it directly or indirectly (through inheritance) specified >that it implements Serializable. > >2) Follow the chain from each session object to other objects that it >references and make sure they are ALL marked as serializable (again - >either directly or indirectly)> > >That will fix your problem. These issues often do not come up until >either you: >1. Try and use session replication. >2. Try to persist sessions to a datastore and access from a cluster. >3. Try to persist sessions across a restart of Tomcat. > >Also, please just reply to the list - not to the list and to the poster. > >HTH - Richard > >Sng Wee Jim wrote: > > >>But the stacktrace says >> >>java.io.NotSerializableException: >>org.apache.coyote.tomcat5.CoyoteRequestFacade >> at >>java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054) >> at >> >> >> >java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1 3 > > >>32) >> at >> >>Since CoyoteRequestFacade is a tomcat class, I assume it has to be >>fixed >>by the tomcat team. Unless the actual object that is not Serializable >>not CoyoteRequestFacade is available somewhere else... >> >>- Jim >> >> >> >>-----Original Message----- >>From: Richard Mixon (qwest) [mailto:[EMAIL PROTECTED] Sent: Monday, >>February 28, 2005 11:13 PM >>To: Tomcat Users List >>Subject: RE: Tomcat clustering and NotSerializableException >> >>As Matt said its probably your applications objects. When we switched >>to >>clustering I was surprised at how many of my session objects I needed >>to >>add serializable to. But it was easy work and quickl done. >> >>HTH - Richard >> >>Dale, Matt wrote: >> >> >>>I would guess that this means you have an object in your session that >>>does not implement the serializable interface. >>> >>>Ta >>>Matt >>> >>>-----Original Message----- >>>From: Sng Wee Jim [mailto:[EMAIL PROTECTED] >>>Sent: 28 February 2005 09:21 >>>To: tomcat-user@jakarta.apache.org >>>Subject: Tomcat clustering and NotSerializableException >>> >>> >>> >>>Hi, >>> >>> >>> >>> >>> >>>I am using Tomcat 5.0.28 on MS Win2k server. >>> >>> >>> >>> >>>After I have uncommented the "Cluster" element in server.xml, I get >>>the following exceptions on the tomcat console for some actions that >>>are using displaytag. >>> >>> >>> >>> >>>Is it a tomcat bug, since >>>org.apache.coyote.tomcat5.CoyoteRequestFacade >>>is involved? >>> >>> >>> >>> >>> >>> >>> >>> >>>(DeltaManager.java:813)- Unable to serialize delta request >>> >>>java.io.NotSerializableException: >>>org.apache.coyote.tomcat5.CoyoteRequestFacade >>> >>> at >>>java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054) >>> >>> >>> >>> >>> at >>>java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java >>> >>> >>> >>>>1332) >>>> >>>> >>> at >>>java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:13 >>> >>>04) >>> >>> at >>>java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.jav >>> >>>a:1247) >>> >>> at >>>java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052) >>> >>> >>> >>> >>> at >>>java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278) >>> >>> at >>>org.apache.catalina.cluster.session.DeltaRequest$AttributeInfo.writeE >>> >>>xternal(DeltaRequest.java:300) >>> >>> at >>>org.apache.catalina.cluster.session.DeltaRequest.writeExternal(DeltaR >>> >>>equest.java:217) >>> >>> at >>>org.apache.catalina.cluster.session.DeltaManager.unloadDeltaRequest(D >>> >>>eltaManager.java:393) >>> >>> at >>>org.apache.catalina.cluster.session.DeltaManager.requestCompleted(Del >>> >>>taManager.java:782) >>> >>> at >>>org.apache.catalina.cluster.tcp.ReplicationValve.invoke(ReplicationVa >>> >>>lve.java:203) >>> >>> at >>>org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv >>> >>>eContext.java:102) >>> >>> at >>>org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j >>> >>>ava:118) >>> >>> at >>>org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv >>> >>>eContext.java:102) >>> >>> at >>>org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav >>> >>>a:520) >>> >>> at >>>org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal >>> >>>ve.java:109) >>> >>> at >>>org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv >>> >>>eContext.java:104) >>> >>> at >>>org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav >>> >>>a:520) >>> >>> at >>>org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929) >>> >>> >>> >>> >>> at >>>org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:16 >>> >>>0) >>> >>> at >>>org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:300) >>> >>> >>> >>> >>> at >>>org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:374) >>> >>> at >>>org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:743) >>> >>> at >>>org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.ja >>> >>>va:675) >>> >>> at >>>org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:866) >>> >>> at >>>org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP >>> >>>ool.java:683) >>> >>> at java.lang.Thread.run(Thread.java:534) >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>>- Jim >>> >>> >>> >>> >>> >>> >*********************************************************************** * > > >>>The information in this email is confidential and is intended solely >>>for the addressee(s). Access to this email by anyone else is >>>unauthorized. If you are not an intended recipient, please notify >>>the sender of this email >>> >>>immediately. You should not copy, use or disseminate the >>> >>>information contained in the email. >>>Any views expressed in this message are those of the individual >>>sender, except where the sender specifically states them to be >>>the views of Capco. >>> >>>http://www.capco.com/ >>> >>> >>> >>> >*********************************************************************** * > > >> >> >> >> >*********************************************************************** * > > >>The information in this email is confidential and is intended solely >>for the addressee(s). >>Access to this email by anyone else is unauthorized. If you are not >>an intended recipient, please notify the sender of this email >>immediately. You should not copy, use or disseminate the information >>contained in the email. 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Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of Capco. http://www.capco.com/ ************************************************************************ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
