dovecot - Nov 2019 - Error: Corrupted index cache file and Error: Maildir filename has wrong S value

What version are you running?

Aki

On 11.11.2019 12.26, Brent Clark via dovecot wrote:
> Good day Guys
>
> Just an update, my colleague and I came across this script.
>
> https://www.dovecot.org/tools/maildir-size-fix.pl
>
> We made a backup, ran it, but unfortunately the problem still persists.
>
> Regards
> Brent
>
> On 2019/11/11 11:42, Brent Clark wrote:
>> Good day Guys
>>
>> I have been met with a very interesting set of error messages.
>>
>> Here is the snippet(s)
>> https://pastebin.com/raw/nFf79Ebc
>>
>> (Sorry for all the redacted REMOVED_*.)
>>
>> Google is proving to be a bit challenging in helping and explaining.
>>
>> Could anyone please share how something like this happens, but more
>> importantly how to recover from this.
>> doveadm index -u <username> INBOX do the trick?
>>
>>
>> I also would like to ask the community, is there any tips or tricks
>> any of you guys do to mitigate index / cache corruptions.
>>
>> Many thanks
>> Regards
>> Brent Clark

Good day Aki

Thanks ever so much for replying.

Interesting that you ask the version of dovecot. Any specific reason, 
this question.?

To answer your question.
dovecot-core 1:2.2.27-3+deb9u5

Regards
Brent

On 2019/11/11 12:27, Aki Tuomi wrote:
> What version are you running?
> 
> Aki
> 
> On 11.11.2019 12.26, Brent Clark via dovecot wrote:
>> Good day Guys
>>
>> Just an update, my colleague and I came across this script.
>>
>> https://www.dovecot.org/tools/maildir-size-fix.pl
>>
>> We made a backup, ran it, but unfortunately the problem still persists.
>>
>> Regards
>> Brent
>>
>> On 2019/11/11 11:42, Brent Clark wrote:
>>> Good day Guys
>>>
>>> I have been met with a very interesting set of error messages.
>>>
>>> Here is the snippet(s)
>>> https://pastebin.com/raw/nFf79Ebc
>>>
>>> (Sorry for all the redacted REMOVED_*.)
>>>
>>> Google is proving to be a bit challenging in helping and
explaining.
>>>
>>> Could anyone please share how something like this happens, but more
>>> importantly how to recover from this.
>>> doveadm index -u <username> INBOX do the trick?
>>>
>>>
>>> I also would like to ask the community, is there any tips or tricks
>>> any of you guys do to mitigate index / cache corruptions.
>>>
>>> Many thanks
>>> Regards
>>> Brent Clark

Good day Guys

I forgot to add and mention a very important piece of the puzzle.

We are making use of dovecots compression plugin.

I.e. https://doc.dovecot.org/configuration_manual/zlib_plugin/#compression

Regards
Brent Clark

On 2019/11/11 14:49, Brent Clark wrote:
> Good day Aki
> 
> Thanks ever so much for replying.
> 
> Interesting that you ask the version of dovecot. Any specific reason, 
> this question.?
> 
> To answer your question.
> dovecot-core 1:2.2.27-3+deb9u5
> 
> Regards
> Brent
> 
> On 2019/11/11 12:27, Aki Tuomi wrote:
>> What version are you running?
>>
>> Aki
>>
>> On 11.11.2019 12.26, Brent Clark via dovecot wrote:
>>> Good day Guys
>>>
>>> Just an update, my colleague and I came across this script.
>>>
>>> https://www.dovecot.org/tools/maildir-size-fix.pl
>>>
>>> We made a backup, ran it, but unfortunately the problem still
persists.
>>>
>>> Regards
>>> Brent
>>>
>>> On 2019/11/11 11:42, Brent Clark wrote:
>>>> Good day Guys
>>>>
>>>> I have been met with a very interesting set of error messages.
>>>>
>>>> Here is the snippet(s)
>>>> https://pastebin.com/raw/nFf79Ebc
>>>>
>>>> (Sorry for all the redacted REMOVED_*.)
>>>>
>>>> Google is proving to be a bit challenging in helping and
explaining.
>>>>
>>>> Could anyone please share how something like this happens, but
more
>>>> importantly how to recover from this.
>>>> doveadm index -u <username> INBOX do the trick?
>>>>
>>>>
>>>> I also would like to ask the community, is there any tips or
tricks
>>>> any of you guys do to mitigate index / cache corruptions.
>>>>
>>>> Many thanks
>>>> Regards
>>>> Brent Clark