You are of course right ;)  I was just experiencing temporary blindness.

I had overlooked an underlying grandparent class of my User class which was
in the Session; the grandparent contains a reference to its creator, which
is the culprit mentioned in the Exception.  This in itself is a nasty that I
wasn't aware of, so that's 2 things to fix now.

All solved now :) thanks Yoav/Ben.

> -----Original Message-----
> From: Shapira, Yoav [mailto:Yoav.Shapira@mpi....]
> Sent: Friday 10 December 2004 14:03
> To: Tomcat Users List
> Subject: RE: sessionS info persistence when restart Tomcat
>
>
>
> Hi,
> Tomcat is not throwing that exception just because it feels
> like it.  An
> instance of that class must be reachable in the serialization
> process of
> at least of the session attributes.
>
> Yoav Shapira http://www.yoavshapira.com
>  
>
> >-----Original Message-----
> >From: Steve Kirk [mailto:tomcat-user@web-...]
> >Sent: Friday, December 10, 2004 8:25 AM
> >To: 'Tomcat Users List'
> >Subject: RE: sessionS info persistence when restart Tomcat
> >
> >
> >no.  I've checked this by adding more debug code to my SessionLogger
> class
> >(which implements all the Listener interfaces).  Every time a session
> event
> >is fired, my listener code lists all the session attribute names and
> values
> >to the log.  So when I shutdown TC, the log output looks like this:
> >
> >2004-12-10 12:08:25 StandardContext[/ao]*** SESSION EVENT:
> >sessionWillPassivate,
> >org.apache.catalina.session.StandardSessionFacade@4ac216
> >2004-12-10 12:08:25 StandardContext[/ao]logSessionAttributes() called
> >2004-12-10 12:08:25 StandardContext[/ao]session
> attribute:TEST1=TestString
> >2004-12-10 12:08:25 StandardContext[/ao]session
> >attribute:TEST2=core.servlet.SessionLogger@95215b
> >2004-12-10 12:08:25 StandardContext[/ao]session
> >attribute:LOGGED_IN_USER=[ID=1,TS='2004-09-15
> >18:14:33.0',GUIDELINEFILENAME='user1.html',COMPANYID='0',FIRS
> TNAME='sup
> er',
> >L
> >ASTNAME='user',TITLE='superuser',KNOWNAS='superuser',EMAILADD
> RESS='ao.s
> uper
> >u
> >ser@web-...',PHONE='01234 superuser',MOBILE='07777
> >super',USERNAME='su',PASSWORD='super',ACTIVE='Y',BRANDID='1']
> >2004-12-10 12:08:25 StandardContext[/ao]num attributes:3
> >
> >So the object named in the log message is not in the
> session.  What is
> in
> >the session is core.sql.bean.User, which is a class of my own design
> that
> >basically just has a load of data fields in it (String, Timestamp,
> int).
> >The blurb you can see in the log is the output of the toString()
> method,
> >which just concats the fields together.  It's parent and
> subclasses are
> all
> >Serializable.  So is the SessionLogger itself.
> >
> >> -----Original Message-----
> >> From: Ben Souther [mailto:bsouther@fwdc...]
> >> Sent: Friday 10 December 2004 13:14
> >> To: Tomcat Users List
> >> Subject: RE: sessionS info persistence when restart Tomcat
> >>
> >>
> >> > INFO: Cannot serialize session attribute LOGGED_IN_USER
> >> > > for session 58FD0ECF29BDCEB9DC096C5DF57A1DCC
> >> > > java.io.NotSerializableException:
> >> > > core.servlet.processor.SubmitLogin
> >> > > at
> >>
> >> > is certainly *not* the class of any object stored in the
> >> > session - I have
> >>
> >> Do you have a reference to it in any of the objects stored in your
> >> session?
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
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> >>
> >
> >
> >
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