[Dovecot] Issues with VANISHED CHANGEDSINCE

[Michael J Rubinsky]

Quoting Timo Sirainen <tss at iki.fi>:

> On 5.11.2012, at 18.13, Michael J Rubinsky wrote:
>
>> I've been seeing the following wonky behavior with Dovecot.  
>> Currently this is with Dovecot 2.0.19, but I was also seeing it in  
>> earlier versions as well, including versions from the 1.x series.   
>> Some background, this is from Horde's ActiveSync library, when it  
>> is trying to determine what UIDs have recently been expunged.  I  
>> can guarantee that when this command was sent, there was only one  
>> or two emails that were removed since the provided MODSEQ value.
> ..
>> <quote>
>> There's definitely something wonky going on in the code.  There's a  
>> certain tipping point of modseqs where the values become incorrect.
>
> I don't think they become incorrect, just that there are more of  
> them than really necessary? Yes, there's a tipping point. It's when  
> the modseq no longer exists in the dovecot.index.log* files, which  
> get rotated once in a while. This shouldn't happen very often.

FYI, I see this about once every two weeks, sometimes more frequently.  
Is there anything we can do to reduce the chance of this happening?

-- 
mike

The Horde Project (www.horde.org)
mrubinsk at horde.org
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