maziggy 774eba73c8 feat(diagnostics): event-loop stall watchdog to catch silent backend freezes ...

Several "container hangs after adding a printer" reports (#1486) share a
  signature with nothing to act on: HTTP goes silent, /health hangs, the
  process may ignore SIGTERM, and the log just stops mid-stream - a frozen
  asyncio loop cannot log a thing.

  loop_watchdog re-arms faulthandler.dump_traceback_later() from an async
  heartbeat. While the loop ticks the timer is cancelled and re-armed before
  it can fire; if the loop stalls for 30s the heartbeat can't re-arm and
  faulthandler's C-level timer thread dumps every thread's stack to stderr,
  so the blocked frame shows up in `docker compose logs`.

2026-05-22 09:28:43 +02:00

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app

feat(diagnostics): event-loop stall watchdog to catch silent backend freezes

2026-05-22 09:28:43 +02:00

tests

feat(diagnostics): event-loop stall watchdog to catch silent backend freezes

2026-05-22 09:28:43 +02:00

__init__.py

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