On Wed, Jun 11, 2008 at 10:52:31AM +0200, Rudy Gevaert wrote: > Bron Gondwana wrote: >> There you go. We've had the 64bit kernel approximately forever, but only >> just upgraded from 2.6.20 series to 2.6.25. >> >>> I can try with a 32bit kernel tomorrow. > > Unfortunate with the 32bit kernel 2.6.24-2 it sync_server still segfaults. Try a 2.6.20 kernel, just for an interesting datapoint. We changed back to 2.6.20 (64 bit still) and haven't seen a corrupted seen file since. >> Oh - can you tell me. Did the file checkpoint sometime not too long before it >> got corrupted? > > The cases I saw it did. Ditto here. Interesting. They also had quite long records, but I don't know how common that is. Lots of little bits of seen spread around the space. >> I've got a small set of theories, but I'm reading the skiplist source code >> (again!) to see if they make sense... >> >> Bron. > > I'm also wondering if what would happen if I brought up a master. Surely > the imap processes would also segfault. Right? If it was on those corrupted files, yes. On that machine - quite probably. If you can afford the hardware it may be worth testing. (hmm, I can possibly dedicate a 64 bit capable machine to testing this. If it's a kernel bug I'd love to reproduce it) > Here I can delete the mailbox on the replica and sync again. As a > reconstruct doesn't help. We find reconstructing helps now - but that's with the 2.6.20 kernel. There were multiple things going wrong before. We originally suspected the external drive unit was playing up, but I'm thinking kernel now. Bron. ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
