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From Andrus Adamchik <>
Subject Re: Intermittent errors with inheritance
Date Tue, 27 Nov 2012 12:40:21 GMT
Hi Ramiro,

Thanks for opening CAY-1775 and sorry for me not answering anything yet. Need to find some
uninterrupted time to sit down and investigate this scenario.


On Nov 20, 2012, at 4:11 PM, Ramiro Aparicio <> wrote:
> I am back again with my inheritance love-horror story.
> If you rememeber from previous chapters I am using a single table
> inheritance with an abstract parent object (SessionLog) and two child
> object (SessionLogApi and SessionLogWeb).
> The problem is that from time to time when I restart the server I start
> getting this errors:
> org.apache.cayenne.CayenneRuntimeException: [v.3.1B1 May 28 2012
> 18:42:43] Can't extract a master key. Missing key (idSessionLog), master
> ID (<ObjectId:SessionLogApi, TEMP:00000E5FC15FE9A1>)
>        at
> org.apache.cayenne.access.DataDomainSyncBucket$PropagatedValueFactory.create(
> After a restart usually are gone and never start happening during the
> life of a running server, so it seems it is some problem with the model
> loading process or something like that.
> I am creating the object like this:
>        SessionLogApi sessionLog =
> createAndRegisterNewObject(SessionLogApi.class); //This calls to newObject
>        sessionLog.setSessionStart(new Date());
>        sessionLog.setToDevice(device);
>        sessionLog.setToUser(device.getToUser());
> But the context I commit has also some more new objects and one of them
> with a relationship (1 to 1) with SessionLogApi (sessionLog ID is stored
> in the other entity), the funny thing is that it does not complain when
> creating a SessionLogWeb in that case there are similar relationships
> with the SessionLogWeb id stored in other entity in the same commit.
> So it only throw errors with one of the two childs and only after some
> server starts (and it continues to fail until a server restart).
> I will happily send more traces to try to catch the error if you tell me
> what do you need.
> Ramiro Aparicio

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