[Dovecot] Stale imap processes
Brad
brad at comstyle.com
Wed Aug 2 03:43:16 EEST 2006
On Tue, Aug 01, 2006 at 05:38:00PM -0700, Pete Slagle wrote:
> Fran Fabrizio wrote:
>
> > Anyone have any theories or experiences as to why for a certain user,
> > some of his imap processes hang, and stay around for days and days? He
> > just reported that his Thunderbird was timing out when trying to open
> > folders, I looked on the server, and he had 3 old imap processes from 1
> > week+ ago. I killed those and his performance immediately improved.
> >
> > He checks mail with Thunderbird > 1.5 from both Win and Linux,
> > Squirrelmail webmail, and pine. Of those, pine is the only one that is
> > somewhat rare around here - any specific problems with pine's imap
> > client code that anyone knows about?
> >
> > We have been using the dovecot-1.0-0.beta2.7 rpm for Fedora Core 5, I'm
> > updating to 1.0-0.beta8.2.fc5 to see if that helps, as well. Just
> > curious if anyone else has seen this lately.
> >
> > Thanks,
> > Fran
>
> I have just seen this problem, big time. I was poking around on a
> FreeBSD 6.1 server because of Thunderbird hangs (see thread
> "dovecot-1.0rc2 problems with Thunderbird" if you are interested), and I
> found over 900 (!) imap process. Only two users were using the dovecot
> server at the time.
>
> I restarted dovecot, but this did NOT kill the multitudinous imap
> processes. After another restart, with a 'killall imap' in the middle,
> things were temporarily fine, but the number of imap processes
> immediately started to grow again. Apparently they never exit. or use
> any CPU, but just sit around in KQREAD state, eventually getting swapped
> out. No error messages are generated.
Stop using the kqueue support! It is broken and has never fully worked
properly. This is a known issue if you back in the list archives.
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