Reuben, could you try this:

service auth-worker { executable = /usr/bin/strace -o /tmp/out /usr/libexec/dovecot/auth -w }

and send the out file to me? I wasn't able to reproduce your problem with glibc-2.28.

Aki

On 31.08.2018 21:30, Aki Tuomi wrote:

Ah. Thanks for the pointer.

---

Aki Tuomi Dovecot oy

-------- Original message -------- From: Michael Marley <michael@michaelmarley.com> Date: 31/08/2018 21:17 (GMT+02:00) To: dovecot@dovecot.org Subject: Re: Dovecot User Listing Error - getpwent() failed: Invalid Argument

I think this might be caused by glibc 2.28.  I saw a similar error with the "doveadm purge" command after upgrading my system to that version.

Michael Marley

On 2018-08-31 13:10, Aki Tuomi wrote:

...

I'll see if this is reproducible

Aki Tuomi Dovecot oy -------- Original message -------- From: Reuben Farrelly <reuben-dovecot@reub.net> Date: 31/08/2018 17:41 (GMT+02:00) To: Aki Tuomi <aki.tuomi@dovecot.fi>, Dovecot Mailing List <dovecot@dovecot.org> Subject: Re: Dovecot User Listing Error - getpwent() failed: Invalid Argument 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?

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Aki Tuomi Dovecot oy

-------- Original message -------- From: Reuben Farrelly <reuben-dovecot@reub.net> Date: 31/08/2018 17:12 (GMT+02:00) To: Aki Tuomi <aki.tuomi@dovecot.fi>, Dovecot Mailing List <dovecot@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@reub.net> > Date: 31/08/2018 16:50 (GMT+02:00) > To: Dovecot Mailing List <dovecot@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