Dovecot 2.2.16: disappearing messages, mismatched summaries, duplicated messages, excessive full re-downloads

[Edgar Pettijohn III]

On Apr 18, 2015, at 9:09 AM, David Gessel wrote:

> Edgar, thanks for the help!
> 
> -------- Original Message --------
> Subject: Re: Dovecot 2.2.16: disappearing messages, mismatched summaries, duplicated messages, excessive full re-downloads
> From: Edgar Pettijohn III <edgar at pettijohn-web.com>
> To: David Gessel <gessel at blackrosetech.com>
> Date: Sat Apr 18 2015 16:30:07 GMT+0300 (Arabic Standard Time)
> 
>> 
>> On Apr 18, 2015, at 8:00 AM, David Gessel wrote:
>> 
>>> 
>>> 
>>> -------- Original Message --------
>>> Subject: Re: Dovecot 2.2.16: disappearing messages, mismatched summaries, duplicated messages, excessive full re-downloads
>>> From: Timo Sirainen <tss at iki.fi>
>>> To: David Gessel <gessel at blackrosetech.com>
>>> Date: Sat Apr 18 2015 15:48:28 GMT+0300 (Arabic Standard Time)
>>> 
>>>> No. My best guess is that (your) ZFS+FreeBSD is simply not behaving the way Dovecot wants filesystems to behave (readdir() sometimes skipping over files). I don't have any other suggestion than trying a different filesystem or OS. I haven't heard ZFS having these problems before though.
>>> 
>>> 
>>> Or migrating to sdbox.  Absent any further suggestions, that will be my next step.  My commitment to Maildir is far lower than my commitment to FreeBSD/ZFS.  It is just a historical preference coming from a decade+ of courier IMAP. 
>> 
>> 
>> 
>> What is the output for:
>> 
>> # zpool status
>> 
>> perhaps you have a hardware issue?
>> 
> 
> All good - quite reliable hardware:  IBM x3655 dual AMD quad core, 40GB of ECC RAM, 8x IBM 2.5" SAS on battery-backed ServeRAID, RAID 6 and (somewhat pointlessly) ZFS2.  All IBM server diagnostics check, full RAM check run without errors, no ECC corrections reported, no uncorrectable errors reported. 
> 
> 
> 
> # zpool status
>  pool: bootpool
> state: ONLINE
>  scan: none requested
> config:
> 
>        NAME        STATE     READ WRITE CKSUM
>        bootpool    ONLINE       0     0     0
>          aacd0s1a  ONLINE       0     0     0
> 
> errors: No known data errors
> 
>  pool: zroot
> state: ONLINE
>  scan: none requested
> config:
> 
>        NAME            STATE     READ WRITE CKSUM
>        zroot           ONLINE       0     0     0
>          aacd0s1d.eli  ONLINE       0     0     0
> 
> errors: No known data errors


are you using compression? If so which.