Dovecot User Listing Error - getpwent() failed: Invalid Argument

[Reuben Farrelly]

Hi Aki,

How did you go with this in the end?  Do you need anything more from me 
or were you able to reproduce this?

Thanks,
Reuben

On 1/09/2018 12:41 am, Reuben Farrelly wrote:
> Sure:
> 
> https://www.reub.net/files/dovecot/lightning-dovecot.conf
> https://www.reub.net/files/dovecot/thunderstorm-dovecot.conf
> 
> Updated nightly.
> 
> Reuben
> 
> 
> On 1/09/2018 12:26 am, Aki Tuomi wrote:
>> Can you provide doveconf -n?
>>
>>
>>
>> ---
>> Aki Tuomi
>> Dovecot oy
>>
>> -------- Original message --------
>> From: Reuben Farrelly <reuben-dovecot at reub.net>
>> Date: 31/08/2018 17:12 (GMT+02:00)
>> To: Aki Tuomi <aki.tuomi at dovecot.fi>, Dovecot Mailing List 
>> <dovecot at dovecot.org>
>> Subject: Re: Dovecot User Listing Error - getpwent() failed: Invalid 
>> Argument
>>
>> No.  Neither of those are installed on either system.
>>
>> Reuben
>>
>> On 1/09/2018 12:09 am, Aki Tuomi wrote:
>>  > Could apparmor or selinux be causing this!
>>  >
>>  >
>>  >
>>  > ---
>>  > Aki Tuomi
>>  > Dovecot oy
>>  >
>>  > -------- Original message --------
>>  > From: Reuben Farrelly <reuben-dovecot at reub.net>
>>  > Date: 31/08/2018 16:50 (GMT+02:00)
>>  > To: Dovecot Mailing List <dovecot at dovecot.org>
>>  > Subject: Dovecot User Listing Error - getpwent() failed: Invalid 
>> Argument
>>  >
>>  > Hi,
>>  >
>>  > I'm running dovecot-2.3 git and seeing on 2 of my Dovecot 
>> installations,
>>  > the following message logged quite frequently:
>>  >
>>  > Aug 31 16:55:53 lightning.reub.net dovecot[7698]: auth-worker(7707):
>>  > Error: getpwent() failed: Invalid argument
>>  > Aug 31 16:55:53 lightning.reub.net dovecot[7698]: replicator: Error:
>>  > User listing returned failure
>>  > Aug 31 16:55:53 lightning.reub.net dovecot[7698]: replicator: Error:
>>  > listing users failed, can't replicate existing data
>>  >
>>  > It appears that this could be having an effect on replication, but 
>> it's
>>  > unclear because the secondary/replica doesn't see much traffic.
>>  >
>>  > Authentication is via PAM and the system is Gentoo Linux x86_64. passb
>>  > driver = pam, userdb driver = static .
>>  >
>>  > doveadm user -u '*' shows the system users listed twice like this (is
>>  > this a problem?) and then prints:
>>  >
>>  > ----
>>  > reuben
>>  > liam
>>  > reuben
>>  > liam
>>  > <some other users>
>>  > Error: User listing returned failure
>>  > Fatal: user listing failed
>>  > ----
>>  >
>>  > To me that doesn't look right.
>>  >
>>  > Can anyone suggest what could be causing this?  I don't recall seeing
>>  > this message some time ago so I suspect it's a recent change in either
>>  > dovecot, or pam or glibc etc..
>>  >
>>  > Thanks,
>>  > Reuben