On Mon, Jan 28, 2013 at 12:46:31PM -0600, Percy Wegmann wrote:
Cool! Which branch/tag should I be looking at? Fixes where checked in on all branches, ie Oct2012, Feb2013 and default.
Niels
Thanks, Percy
On Mon, Jan 28, 2013 at 12:30 PM, Niels Nes <Niels.Nes@cwi.nl> wrote:
On Mon, Jan 14, 2013 at 04:58:24PM -0600, Percy Wegmann wrote: > Hi Niels, > > Sorry about the delay. I grabbed the code from the the Oct2012 branch > in mercurial, built it and ran the test from http:// bugs.monetdb.org/ > show_bug.cgi?id=3210. mserver5 shows a version of 11.13.8. > > Sadly, it still fails occasionally. It might be failing less > frequently than before, but that's just anecdotal - it's always been > non-deterministic and I haven't run it often enough to come up with a > statistically significant result.
Last week we fixed another, (even) less frequent problem. Hopefully this also solve your concurrency problems.
Niels > > Thanks, > Percy > > > On Mon, Jan 7, 2013 at 8:49 AM, Percy Wegmann < percy@clicksecurity.com> > wrote: > > Hi Niels, > > I will do that. It might be a few days before I get to this as > we're in the middle of testing with the SP2 release, but I'll > definitely get around to it. > > Thanks! > Percy > > > On Mon, Jan 7, 2013 at 8:44 AM, Niels Nes <Niels.Nes@cwi.nl> wrote: > > On Mon, Dec 17, 2012 at 04:59:03PM -0600, Percy Wegmann wrote: > > Dear MonetDB Team, > > > > We're starting to exercise our MonetDB installation more > heavily now > > and I've run into a strange issue where I get an occasional > "COMMIT: > > failed" message. > > > > It seems that the conditions required to produce this are: > > > > - Concurrently inserting into two different tables > > - At the same time, issuing a SELECT COUNT(*) against either > of those > > tables > > > > I've logged a bug with more detailed information, including a > Java test > > case: > > > > http://bugs.monetdb.org/show_bug.cgi?id=3210 > > > > I'm only just starting my investigation, but I suspect that > COUNT(*) > > may be the culprit, since other selects like SELECT * don't > seem to > > have this problem. > > > > Does this ring any bells? Are there any special > optimizations for > > COUNT(*) that bypass the underlying BAT and/or have side > effects on > > some shared table somewhere that could be causing a > concurrency > > violation? > > > > Thanks, > > Percy > > We fixed a problem today which looks very similar too yours. > Could you > verify if the fixes checked in to the Oct2012 and Feb2013 > branches also > solve your problem? > > Niels > > > > -- > > > > Percy Wegmann > > +1 512 637 8500 ext 148 > > > > > _______________________________________________ > > users-list mailing list > > users-list@monetdb.org > > http://mail.monetdb.org/mailman/listinfo/users-list > > > -- > Niels Nes, Centrum Wiskunde & Informatica (CWI) > Science Park 123, 1098 XG Amsterdam, The Netherlands > room L3.14, phone ++31 20 592-4098 sip:4098@sip.cwi.nl > url: http://www.cwi.nl/~niels e-mail: Niels.Nes@cwi.nl > > _______________________________________________ > users-list mailing list > users-list@monetdb.org > http://mail.monetdb.org/mailman/listinfo/users-list > > > > > > -- > > Percy Wegmann > +1 512 637 8500 ext 148 > > > > > -- > > Percy Wegmann > +1 512 637 8500 ext 148
> _______________________________________________ > users-list mailing list > users-list@monetdb.org > http://mail.monetdb.org/mailman/listinfo/users-list
-- Niels Nes, Centrum Wiskunde & Informatica (CWI) Science Park 123, 1098 XG Amsterdam, The Netherlands room L3.14, phone ++31 20 592-4098 sip:4098@sip.cwi.nl url: http://www.cwi.nl/~niels e-mail: Niels.Nes@cwi.nl
_______________________________________________ users-list mailing list users-list@monetdb.org http://mail.monetdb.org/mailman/listinfo/users-list
--
Percy Wegmann +1 512 637 8500 ext 148
_______________________________________________ users-list mailing list users-list@monetdb.org http://mail.monetdb.org/mailman/listinfo/users-list
-- Niels Nes, Centrum Wiskunde & Informatica (CWI) Science Park 123, 1098 XG Amsterdam, The Netherlands room L3.14, phone ++31 20 592-4098 sip:4098@sip.cwi.nl url: http://www.cwi.nl/~niels e-mail: Niels.Nes@cwi.nl