[Dovecot] unkillable imap process(es) with high CPU-usage

[Seth Mattinen]

Timo Sirainen wrote:
> On Sun, 2009-02-15 at 12:10 -0700, Gene Steinberg wrote:
>> This is sounding similar to the problem I have with my setup:
>>
>> 1. High CPU usage.
>>
>> 2. Can't kill IMAP.
> 
> kill -9 doesn't work for imap processes? You didn't mention this before.
> 
>> I'm using CentOS 5.2 64-bit version with the latest cPanel.
>>
>> So what am I missing, other than the problem nobody else is having is  
>> clearly something they ARE having?
> 
> If you can't kill -9 a process, it means the kernel is buggy. At least
> 2.6.27 was buggy and it was fixed in 2.6.27.10.
> 


Or it's I/O locked on the filesystem i.e. NFS server went away or 
something else. What state ate the un-killable processes in? (Z, D, S, etc.)

~Seth