> ## Documentation Index > Fetch the complete documentation index at: https://docs.limitguard.ai/llms.txt > Use this file to discover all available pages before exploring further. # September 8, 2026 > Outage post-mortem published for the June 19 to September 5 event-loop block ## Post-mortem Published A new **Post-mortems** section collects write-ups of production incidents. The first entry covers the outage that ran from 2026-06-19 to 2026-09-05. ### June 19 to September 5 outage [Outage post-mortem, 2026-06-19 to 2026-09-05](/postmortems/2026-09-langfuse-event-loop) covers 78 days during which `api.limitguard.ai` returned HTTP 503. The process stayed alive throughout: its asyncio event loop was blocked in one synchronous call to the tracing backend that had no timeout, and a blocked process still counted as running, so the platform never restarted it. No API behavior changed with this entry, and no customer data was involved. The fixes it describes shipped to the API between September 5 and September 6, 2026. The page documents the timeline, the root cause, why no monitor reached a person, and the changes made since — probes moved off the event loop with a bounded pool and timeouts, a 30 s loop watchdog that turns a hung process into an exited one, host-side alerting and restart, and settlement reconciliation for rows stranded by a hard exit.