Hi there, I'm experiencing a problem with Cyrus 2.3.8 interacting with an Outlook client and was hoping this would be the right place to get some advice. What happens is that periodically (maybe around once a month?) we have one particular user who contacts us complaining that they are unable access their mailbox. Generally we always find the same thing: there is an imapd process accessing his seen DB which is running at 100% CPU. Once this process is killed then things go back to normal and the user can log in. The latest report we had of this problem happening again was this morning, and fortunately I was in a position to attack it with gdb and a file of debug symbols. This showed that the process in question was getting stuck in a loop in index_expungeuidlist(). I've uploaded the transcript of my gdb session to http://pastebin.siriusit.co.uk/cyrus-imapd-gdb.txt for people who are familiar with cyrus internals. The short story appears to be that newseenuids (new) points to an empty string ('\0') and so the code gets stuck because of the following at line 532 of imap/index.c in index_checkseen(): oldseen = (*old == ':'); Since *old is an empty string, oldseen will always be 0, and so the while() loop never exits. Unfortunately this is the first time I've ever looked at cyrus internals, so am not really sure what the seen list should look like normally. The confusing thing is that we have been using these packages for several clients and this is the *only* particular server and the *only* user on this server experiencing this problem. The one thing we have noticed is that this particular user has a larger mailbox compared to the other users (~1GB) but then it doesn't seem so large as if it would cause any problems. Finally, one more thing to add is that we have already gone through the steps of rebuilding the seen DB skiplist using the skiplist.py script several times when this has happened in the past, and it has made no difference. Many thanks, Mark. -- Mark Cave-Ayland Sirius Corporation - The Open Source Experts http://www.siriusit.co.uk T: +44 870 608 0063 ---- 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
