Re: Dovecot 2.4 doveadm_worker_count corrupts tab-formatted output

On 27/02/2026 17:56, Philip Iezzi via dovecot wrote:
>   ...
>
>     Yes, I am definitely running into some kind of limit. It's not on MySQL
>     level - tuned it a lot for high performance and connection hammering, and
>     never found any error in MySQL log.
>     Above workaround is now running for a full day, pulling all user quotas
>     every 4mins, without running into this issue again.
>     As `doveadm quota get -A` was always running fine on Dovecot 2.3 and I can
>     now (under Dovecot 2.4.2) retrieve all quotas by piping all users into
>     `-F`, it should definitely be possible to fix/optimize the `-A`
>     iterate_query for mailservers with larger user base.
>     @Aki did you guys experience this issue and can I provide you any more
>     information to help you get this fixed?
>     I can definitely live with my workaround, just hope others are not
>     struggling with it and wasting so much time as I did.
>     Best regards,
>     Philip
>
>
Hi Philip

this is reproducible by filling the usertable with around 2000 users and 
running doveadm quota get -A. For me it also fails on

      doveadm quota recalc -A

      /usr/bin/doveadm index -A '*'

As you already saw the process never completes and gives an error on a 
different user each time though roughly somewhere between 2-3 seconds 
into the execution for quota recalc.

quota get seems to present slightly more variable behaviour in terms of 
how long before it fails but that could be influenced by terminal output 
time.

The log entry I saw was "auth: Error: auth-worker: Aborted LIST request 
for *: Shutting down"

doveadm user '*' does complete ok, but that only does the iterate query, 
whereas the other commands do the iterate and then lookup the single 
users too.

I don't see any configurable timeout limits that seem relevant to this 
issue, so it looks like a bug when running commands needing to iterate 
through 1000s of users with the iterate_query and then doing lookups for 
the single users user the userdb query.

John

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