Re: [Dovecot] Dovecot imap processes pinning CPU
On Sat, December 13, 2008 12:28 am, Timo Sirainen wrote: On Dec 13, 2008, at 3:40 AM, David Rosenstrauch wrote: In recent days, dovecot's imap processes keep getting stuck. Each time I check my server (running dovecot 1.1.7) there's a bunch of imap processes (sometimes 2 of them, sometimes 4, sometimes 6) that are using all of the box's CPU. I wonder what's going on. You're the 3rd person who has started a thread about this within a few days. See the unkillable imap process(es) with high CPU-usage thread that's going on, with the exact same issue.. http://dovecot.org/list/dovecot/2008-December/035662.html Wow. Yeah, *some*thing's changed recently to cause this. If I had to guess, I'd say it's a recent Thunderbird upgrade that's triggering it, as it's been 2-3 weeks since my last dovecot upgrade. I'll take a look at that thread. What distribution and kernel version are you using? Arch Linux, kernel 2.6.27.8 Thanks, DR
Re: [Dovecot] unkillable imap process(es) with high CPU-usage
On Sat, December 13, 2008 5:43 am, Timo Sirainen wrote: The other guy who also had a problem was using 2.6.27. If the 3rd guy also replies that he's using 2.6.27 then that's pretty clearly the problem. Might be worth asking about in Linux kernel mailing list. Has anyone reported this over on LKML yet? Or filed a bug? DR
Re: [Dovecot] Dovecot imap processes pinning CPU
David Rosenstrauch wrote: Wow. Yeah, *some*thing's changed recently to cause this. If I had to guess, I'd say it's a recent Thunderbird upgrade that's triggering it, as it's been 2-3 weeks since my last dovecot upgrade. Some other interesting data points: * This problem seems to happen when I use Thunderbird (both on Linux and Windows) as my MUA, but not with Squirrelmail. * The IMAP process seem to start going haywire when I shut Thunderbird down. DR
[Dovecot] Dovecot imap processes pinning CPU
In recent days, dovecot's imap processes keep getting stuck. Each time I check my server (running dovecot 1.1.7) there's a bunch of imap processes (sometimes 2 of them, sometimes 4, sometimes 6) that are using all of the box's CPU. And worse, there's no way to kill the processes either (neither kill -15 or kill -9 works), which means that I wind up having to reboot the box every time this happens. REALLY irritating. I don't normally even *see* the imap processes in htop, as I think they're pretty short lived. And I'm not sure what they're looping trying to do. My debugging skills on Linux are a bit weak, and so I don't know how to look at the process and see what it's doing. Also, not sure what's changed on my system to cause this, as this is definitely a recent problem. Maybe the upgrade to Thunderbird 2.0.0.18 (since I usually use T'Bird to access my email). I don't seem to run into this problem when I use Squirrelmail. Anyone have any idea what the problem might be? Or, if not, then suggestions on how I might be able to debug the situation myself? TIA, DR
