A swarm overlay-network blip after the :latest redeploy left Redis healthy but
transiently unreachable; a worker starting in that window crash-looped on the
initial broker connect (kombu OperationalError) and needed a manual Redis reset
to recover.
Retry the broker forever on startup + at runtime (broker_connection_max_retries
=None), add redis-transport socket options to the broker (short connect timeout,
TCP keepalive, retry_on_timeout, periodic health check), and mirror the same on
the Redis result backend. Now a transient outage self-heals when overlay routing
returns instead of the worker exiting.
Test pins the key resilience settings.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XCUHUGQLrBrkgyk1t49kpX
Routes are pre-declared for FC-2/FC-3 task modules (import, ml, thumbnail,
download, scan, maintenance). Queue lanes match the ImageRepo pattern where
beat+maintenance run on a separate worker so long imports don't starve
periodic tasks. Smoke ping task confirms the wiring in eager mode for CI.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bvandeusen