> I certinaly had problems a few years ago with fossil deadlocking, > since I disabled ephemeral snapshots it has been quite reliable. > > My feeling (nothing more than that) was that the deadlocks seemed to > occur when I receved email just at the time of the snapshot. > > the problem seemed to occur at a rate of once per month or two > for my lightly loaded home server. > > I did try to run two file servers for a while, exporting > /proc from the test machine with snapshots enabled to a seccond one. > The hope was that I would be able to use acid to debug the test > machine's fossil when the problem occured. Sadly I never caught the > problem and had to decomission the old machine (house repairs).
It is pretty easy to reproduce this bug. When writing a large file, run "snap -a", then "snap" four times. Fossil should hang. I just tried and I am able to reproduce it reliably on a new Fossil. I've uploaded the stack traces on my website. http://www.9grid.fr/www.9grid.fr/misc/fossil/deadlock1 -- David du Colombier
