Re: Exception with Tomcat's session restore capability

From: Dave Dombrosky (dombr..mail.com)
Date: Mon Sep 11 2006 - 16:45:33 EDT

  • Next message: Mike Kienenberger: "Re: Exception with Tomcat's session restore capability"

    I downloaded the 1.2.1 source and added some code to figure out what
    is going on. It appears that context.getChannel() from
    ObjectStore.java line 945 is returning null. I am guessing that this
    is because of DataContext line 182 which declares the channel to be
    transient. Transient properties are not serialized, which is how
    tomcat saves the session, so it is reverting back to it's default
    value (null).

    I tried removing the "transient" part of the variable declaration, but
    then Tomcat complains on a different piece of code. I'm not even sure
    if that's the best way to fix it so I don't think I'll explore that
    any further yet. Is this issue something that I should add to JIRA?

    -Dave

    On 9/11/06, Mike Kienenberger <mkienen..mail.com> wrote:
    > My suggestion would be to look at the 1.2.1 source and see what's
    > going on at ObjectStore.java, line 945.
    >
    > On 9/11/06, Dave Dombrosky <dombr..mail.com> wrote:
    > > Problem still occurs on 1.2.1
    > >
    > > On 9/11/06, Mike Kienenberger <mkienen..mail.com> wrote:
    > > > Maybe http://issues.apache.org/cayenne/browse/CAY-614 ?
    > > >
    > > > This was fixed for 1.2.1. It might be related.
    > > >
    > > > On 9/11/06, Dave Dombrosky <dombr..mail.com> wrote:
    > > > > I am currently having problems when trying to use Cayenne 1.2 along
    > > > > with Tomcat's (v5.0.28) session restore capability. That is to say,
    > > > > if I deploy new code and restart tomcat, it saves the session data
    > > > > instead of starting with all new sessions when it starts up.
    > > > >
    > > > > My problem is that I used to be able to restart and stay logged in
    > > > > using version 1.1. Version 1.2 seems to have problems with trying to
    > > > > look up data after I have restarted Tomcat, and I get this stack trace
    > > > > caused by a NullPointerException:
    > > > >
    > > > > org.objectstyle.cayenne.access.ObjectStore.resolveHollow(ObjectStore.java:945)
    > > > > org.objectstyle.cayenne.access.DataContext.prepareForAccess(DataContext.java:1842)
    > > > > org.objectstyle.cayenne.CayenneDataObject.readProperty(CayenneDataObject.java:238)
    > > > >
    > > > > I couldn't find anyone else with this problem, so I assume I am doing
    > > > > something wrong and it's not a bug. Any ideas?
    > > > >
    > > > > -Dave
    > > > >
    > > >
    > >
    >

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