MariaDB logged an [Warning] Aborted connection ... (Got an error/timeout
reading communication packets) for every DB connection PHP closed without
the COM_QUIT handshake — i.e. whenever a long-lived worker (queue/schedule/
reverb) was recycled, a php-fpm worker retired, or a container restarted.
These are protocol-normal, not a fault: Aborted_clients was 46 over ~24
days uptime (~2/day) with a non-persistent PDO pool and no connection leak.
They surface only because the mariadb:11 image ships log_warnings=2. Add
docker/mariadb/tuning.cnf (mounted in dev + prod) setting log_warnings=1 —
genuine errors still log, the expected-disconnect noise stops — plus a
higher net_read_timeout (120s) so a momentarily-stalled worker read isn't
aborted as aggressively. Verified: forcing app+queue restarts now produces
zero new "Aborted connection" lines. The DB is internal-network only, so
dropping the level-2 access-denied notes carries no real exposure.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
boban