Hmmmm.... Off the top of my head, I'm not sure what's going on. I'll look into this tomorrow.
Cheers, Ian On Jan 3, 2009, at 5:18 PM, Alex Mizrahi wrote: > HD> Which of stable/unstable do you recommend using? > > i think we'll eventually switch to "unstable", so if you're planning > for the future, this would be a better option. also the more people > use it, faster we will find all bugs in a new version. OTOH in a short > term perspective "stable" is more tested. > > HD> instrumenting it shows that when the problem occurs, the crippled > HD> pm-btree is being recreated (not in cache). > > aha, thanks for finding this out -- it appears that recreation code > in unstable is severely broken. > > i do not understand the idea behind these changes, i hope Ian can > clarify > this > so we'll find a way to fix this. > > in old version recreate-instance-using class for standard-class > objects was > just called make-instance, > so it went through the normal initialization procedure. > > in a new version it just calls allocate-instance, so pm-btree has > absolutely > no chance to > initialize itself -- neither initialize-instance is called to fill > slots > with iniforms, nor shared-initialize is called, > and we end up with a blank object. > > here's a piece of documentation: > > (defmethod recreate-instance-using-class ((class standard-class) &rest > initargs &key &allow-other-keys) > (declare (ignore initargs)) > "Simply allocate store, the state of the slots will be filled by > the data > from the > database. We do not want to call initialize-instance and re- > evaluate the > initforms; > we are just fetching the object & values from the store" > (allocate-instance class)) > > but i fail to understand the point -- how exactly are we "feching > the object > & values from the store" for standard-class > classes? is that some new object serialization mechanism or just an > error? > > > > > > _______________________________________________ > elephant-devel site list > elephant-devel@common-lisp.net > http://common-lisp.net/mailman/listinfo/elephant-devel _______________________________________________ elephant-devel site list elephant-devel@common-lisp.net http://common-lisp.net/mailman/listinfo/elephant-devel
