[Dovecot] Dovecot imap processes pinning CPU

[Darren Pilgrim]

David Rosenstrauch wrote:
> 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.

Another data point:

I do not see this problem on multiple installations of 1.1.7 on FreeBSD 
6.3.  Clients are Thunderbird 2.0.0.18, Horde-IMP 4.3, Horde-DIMP 1.1, 
Roundcube 0.2.b and SquirrelMail 1.4.17.