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docs(cloud): dry-run #11 froze; #12 armed with longer window

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Jinwoo-H
2026-09-04 06:09:04 -04:00
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cloud/docs/relay-reconnect-2026-09-findings.md
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@@ -28,7 +28,8 @@ never raw ids. Nothing here is a production mutation record unless the "Mutation
| Monitor dry-run #8 (gen 112) | Green for 15 of 16 samples (09:09:38–09:24), froze on the final sample 09:25:22Z: `director.errors` 1 > 0. The one 500 was `/v1/admin/evacuation-status` at 09:23:50Z, 2.01 s latency = director pg-connect timeout, called by **the monitor's own collector** (`incident-monitor-sources.ts:492`). First evacuation-status 500 since Sep 1. The gate froze on a request it made itself. | run 33856905229 |
| Monitor dry-run #9 (gen 112) | Froze: c13/c23 crashed 50 s after dispatch, then c14/c20/c9 at 09:34. | run 33858650691 |
| Monitor dry-run #10 | Dispatched 09:46:13Z; froze at sample 5 (09:56:59Z): `director.errors` 12. All twelve at 09:55:17–21Z, 0.8–2.1 s latency, 10 on `/v1/regions` + 2 on `/v1/assign`; c16 and c8 crashed at 09:55:19 in the same second. A single 4-second Postgres connect stall hit director and cells together. | run 33859947207 |
| Monitor dry-run #11 | Dispatched 10:06:20Z; c8 and c20 crashed 10:05:54, 3 s before the waiter's quiet check passed (log ingestion lag). Expected to freeze on their probes. Next waiter: 10-min window, 60 s ingestion lag. Was armed 09:58Z; holds until 6 clean min (last crash 09:59:21). Cascade gaps since 09:00: 31, 2.9, 5.1, 16.1, 4.0 min (median 5); a 15-min clean window is ~28% per attempt at this rate. | |
| Monitor dry-run #11 | Froze at sample 2 (10:08:07Z): `director.concurrency` 79.8 > 64, the c8/c20 re-dial. They crashed 10:05:54, 3 s before the waiter's quiet check passed (log ingestion lag). | run 33861578009 |
| Monitor dry-run #12 | Waiter armed 10:09Z: 10-min quiet window + 60 s recheck for late-ingested crashes, then dispatch, then canary c7 on green. 11 dry-runs so far: 1 pass (#6), 10 freezes, none on a real fleet-health regression. | Cascade gaps since 09:00: 31, 2.9, 5.1, 16.1, 4.0 min (median 5); a 15-min clean window is ~28% per attempt at this rate. | |
| Gate decision | Owner asked at 09:36Z to choose: A keep looping / B recalibrate `directorErrors` 0 -> small n / C human bypass. Ten dry-runs, four froze on this bar. Recommendation B+A. Note: B alone would not have passed #9 or #10 (cell health probes and a 12-error burst); it fixes the single-500 false freezes (#7, #8) only. | |
| Batch roll | **Deferred by plan**: roll once with the lock-fix image instead of twice. | |
| PR #18606 lock removal (root cause) | **Merged** 09:2xZ as 7b108abf71 after review, fix, re-verify; CI green | https://github.com/stablyai/orca/pull/18606 |