dovecot and broken uidlist

[Alessio Cecchi]

Hi Maciej,

I'm using LDA for delivery email in mailbox (Maildir) and I think(hope) 
that switching to LMTP via director will fix my problem, but I d'ont 
know why wiht old kernel works and with recent no.

Are you using POP/IMAP and LMTP via director so any update to dovecot 
indexes is done from the same server?

Il 19/01/21 16:22, Maciej Milaszewski ha scritto:
> Hi
> I use lmtp and you ?
>
> On 19.01.2021 10:45, Alessio Cecchi wrote:
>> Hi Maciej,
>>
>> I had the same issue when I switched dovecot backend from Cento 6 to
>> Centos 7.
>>
>> Also my configuration is similar to you, Dovecot Direcot, Dovecot
>> backend that share Maildir via NFS on NetApp.
>>
>> For local delivery of emails are you using LDA or LMTP? I'm using LDA.
>>
>> Let me know.
>>
>> Thanks
>>
>> Il 13/01/21 15:56, Maciej Milaszewski ha scritto:
>>> Hi
>>> I have been trying resolve my problem with dovecot for a few days and I
>>> dont have idea....
>>>
>>> My environment is: dovecot director+5 dovecot guest
>>>
>>> dovecot-2.2.36.4 from source
>>> Linux 3.16.0-11-amd64
>>> storage via nfs (NetApp)
>>>
>>> all works fine but when I update OS from debian 8 (kernel 3.16.x) to
>>> debian 9 (kernel 4.9.x ) sometimes I get random in logs:
>>> Broken dovecot-uidlist
>>>
>>> examle:
>>> Error: Broken file
>>> /vmail2/po/pollygraf.xxx_pg_pollygraf/Maildir/dovecot-uidlist line 88:
>>> Invalid data:
>>>
>>> (for random users - sometimes 10 error in day per node, some times more)
>>>
>>> File looks ok
>>>
>>> But if I change kernel to 3.16.x problem with "Broken file
>>> dovecot-uidlist"  - not exists
>>> if turn to 4.9 or 5.x - problem exists
>>>
>>> I have storage via nfs with opions:
>>> rw,sec=sys,noexec,noatime,tcp,hard,rsize=65536,wsize=65536,intr,nordirplus,nfsvers=3,tcp,actimeo=120
>>> I tested with "nocto" or without "nocto" - nothing changes ......
>>>
>>> nfs options in node:
>>> mmap_disable = yes
>>> mail_fsync = always
>>>
>>> I bet the configuration is correct and I wonder why the problem occurs
>>> with other kernels
>>> 3.x.x - ok
>>> 4.x - not ok
>>>
>>> I check and user who have problem did not connect to another node in
>>> this time
>>>
>>> I dont have idea why problem exists on the kernel 4.x but not in 3.x
>>>
>>>
>> -- 
>> Alessio Cecchi
>> Postmaster @ http://www.qboxmail.it
>> https://www.linkedin.com/in/alessice
>
-- 
Alessio Cecchi
Postmaster @ http://www.qboxmail.it
https://www.linkedin.com/in/alessice

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