Thanks, I have not [been able to] debug the problem, as the initial error occurs in a non-deterministic manner (well by current observations, but computers do not behave non-deteministically :) )
One possibility I thought of is concurrency. I have only run into the problem on machines with (development environment) with 4 Cores. On single CPU EC2 it has not occured (yet). The initial problem states "double lock" and that is what makes me think of this as a potential cause. What plans do Qi4j team have for persistence regarding eventsourcing? This issue https://ops4j1.jira.com/browse/QI-280 seems related. Our team is now trying a different design, with a separate entity the data that was modeled into a Mixin. The problem has so far only occured when this Mixin was added to an existing Entity, which has several mixins already. Could there be a problem with size of metadata inferred by the number of mixins and properties/relations? I will let you know if this solution/workaround eliminates the error. /Dag 2011/6/18 Rickard Öberg <[email protected]> > On 6/18/11 16:32 , Dag Blakstad wrote: > >> The .db file is approximately 159 MB. Measured by today's size of a >> database >> this is a small, but are there parameters or limitations on the jdbm? >> > > That's tiny, so that's not it then. In that case I don't really know what > to look for. Have you tried any debugging sessions to see what causes this > exception to be thrown in the first place? > > One option is for us to migrate to JDBM2: > http://code.google.com/p/**jdbm2/ <http://code.google.com/p/jdbm2/> > At least that seems to be better maintained. Won't help you in the short > run though. > > > /Rickard > > ______________________________**_________________ > qi4j-dev mailing list > [email protected] > http://lists.ops4j.org/**mailman/listinfo/qi4j-dev<http://lists.ops4j.org/mailman/listinfo/qi4j-dev> > -- ------------------------------------ Dag Blakstad http://no.linkedin.com/in/dagblakstad http://webstep.no/ansatte/dag-blakstad/ Senior Konsulent Webstep AS Mobil : +47 95 22 69 22 Lysaker Torg 2, 1366 Oslo Pb 66, 1324 Lysaker http://www.webstep.no Oslo - Bergen - Stavanger - Trondheim ------------------------------------ _______________________________________________ qi4j-dev mailing list [email protected] http://lists.ops4j.org/mailman/listinfo/qi4j-dev
