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From Andrus Adamchik <>
Subject Re: Exception with Tomcat's session restore capability
Date Mon, 11 Sep 2006 21:01:11 GMT

could you post the rest of the stack? Looks like the fault fires on  
deserialization, i.e. too early in the container lifecycle when there  
is no DB connection yet. Normally this shouldn't happen. I wonder  
what causes it; and the answer might be a few steps up the stack trace.


On Sep 11, 2006, at 1:46 PM, Dave Dombrosky 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 
> (
> org.objectstyle.cayenne.access.DataContext.prepareForAccess 
> (
> org.objectstyle.cayenne.CayenneDataObject.readProperty 
> (
> 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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