On 08/07/2026 19:19 EEST Mail Operations via dovecot <dovecot@dovecot.org> wrote:
Hello list
We are running a dovecot 2.4 instance and the following errors start to pop up after a listener is configured to scrape metrics with Prometheus:
... dovecot[2090309]: stats: Error: conn unix:stats (pid=2090333,uid=108): Client sent invalid input for CATEGORY: Category parent 'ssl' changed to 'ssl' (input: CATEGORY ssl-client ssl)
Stats listener config:
service stats { inet_listener http { port = 9090 ssl = yes } }
So far I failed to reliably trigger the error messages and it looks like they appear randomly. Besides the logged errors, everything seems to work correctly.
Could this be a possible bug, or configuration error?
Kind regards, Patrik
Hi,
can you send full doveconf output please? I tried to reproduce this with your config snippet but at least with 2.4.4 it didn't happen.
Aki